How to use fossils in a sentence

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Sentence Examples The last time you were in Las Vegas, you scooped up too many tchotchkes at Comdex, emptied your pockets at the slot machines, hunted for fossils. La Brea tar pits and the Page Museum is an excellent place to see the fossils and reconstructions from this period. Not all these fossils are in pristine condition, however, as taphonomy has taken its toll. Weidenreich came to the Museum in 1941, just before the Japanese invaded Beijing and his beloved Peking man fossils were lost in the shuffle. Ediacaran fossils are represented by Charnia, a sagittate fossil reaching up to 0.6 m in length. In contrast, dinosaur fossils have been traced in Triassic, Jurassic and Cretaceous periods. The La Venta site has yielded fossils assignable to as many as ten genera, whereas most localities will have no more than three. Remains of ostraderms from Ordovician rocks comprise some of the oldest vertebrate fossils. Experts have been cleaning the 13 fossils ready for display as part of the terms of the loan from the Geological Museum of China in Beijing. They are mainly bioclastic limestones, containing abundant fossils and fossil fragments. The first fossils from this area were found in 1819 in limestone along the lake's shore, and new species continue to be found there. The fossils indicate the wings had feathers, arranged in a similar pattern to that of modern birds. Harris and Leakey review the rhinos, represented by cranial, dental, and postcranial fossils. The oldest anthozoans are probably some of the polyp-like and sea pen-like fossils from the Vendian. In these fossils, detail of legs, antennae, wings, and even small body hairs are preserved. This is a sequence of fossils which shows in great detail how the mammalian inner ear bones evolved from similar bones in the reptilian jaw. He and his type would be regarded as living fossils, relics of an earlier era. Features such as knots and branches can be recognized in some of the fossils. Fortunately, fossils of woolly mammoths are abundant in many parts of this species' former range. Paleontologists who work on relatively recent fossils have developed approaches to reconstructing past climates and environments. Show More Sentences They are known from Recent fossils and probably survived until the arrival of Europeans. However, there are no fossils of animals which appear to be intermediate between possums and kangaroos. Until recently, sauropod body fossils and ichnofossils were known only from Jurassic and Cretaceous sediments. By the Miocene, whales of both lineages are relatively common fossils in many marine deposits. He made many contributions to knowledge of the vertebrate and invertebrate fossils of the West Coast. The shoreline was ten feet away, lined with weather-beaten fossils of forgotten fishing boats. He jets to Bruce Springsteen concerts, has several luxury cars and collects fossils in prehistoric amber. Variation in individual samples is high, and quantitative analysis of amino acids from fossils of this age has no value for taxonomy. A Pliocene age for the Siesta palaeosol and Nothofagus fossils has been inferred from diatom and palynological biostratigraphy. However palynology and vertebrate fossils have yielded reliable ages for a few basins. The only fossils I recall seeing that day were masses of a perpendicular pipe-like burrow in the rock. Yet the earliest dinosaur fossils that best fit into the dino to bird scenario are contemporary with the earliest bird fossils. Vertebrate and invertebrate animals, land plants, and protists are all represented as fossils in the Solnhofen Limestone. After we cleaned off the detritus, I spotted several small fossils embedded in the rock and pointed them out to Zack. He says future biomechanical studies of fossils like the recently found foot bones could determine just how fleet-footed large terror birds were. Molecular fossils are recovered and studied using chromatographic techniques, mass spectrometry, and spectrophotometry. He has taken possession of the fossils to study them, and this has a number of researchers worried. Scientific testing has determined that the oldest dinosaur fossils are hundreds of millions of years old. Two years ago, scientists described 5-million-year-old albatross fossils representing five different species. The decapod fossils are preserved in remarkable detail as molds and as body fossils. Show More Sentences The new fossils are from chronometrically controlled stratigraphic sequences and date to about 4.1-4.2 million years ago. The oldest fossils of parrotfishes, including one eroding species, are all of Miocene age. Until recently, however, no sponge body fossils had been identified or described from this fauna. Pasting on a fake smile, I nodded fervently, no longer eager to study silly fossils of dead organisms. Most geologists are familiar with the occurrence of plant compression fossils in bedded sedimentary rocks. Almost no dinosaur fossils have been found from that time, particularly in North America. Shallow marine invertebrate fossils occur throughout the formation, but are mainly concentrated in four broad intervals. Marine rocks commonly contain plant fossils but they are outnumbered by more common and spectacular shelly invertebrate fossils. I decided that my own role could be to collect plant fossils for their research and museum collections. The fossils were accidentally discovered by a farm worker in a remote area in the Patagonian province of Chubut. Most of the other scholars were old fossils that seemed so fragile that the slightest breath of wind would keel them over. Old words become linguistic fossils as new words replace them in response to events and developments in a rapidly changing world. It has usually been represented in ModE by gh, leaving its silent fossils in such words as dough, night, through, thought, thorough. Spiders are rarely fossilized since they have no hard skeleton and usually thrive away from water, where sediments ideal for fossils accumulate. The fossils were uncovered when land was being cleared for an olive orchard. The combination of fossils and gouged marks created a metaphoric interplay between fossilized creatures and shelled victims. Many fossilized insects and animal fossils are identical to those living today. Almost half of the dinosaur fossils found in southeastern Australia are hypsilophodontids. The discovery of the Peking Man fossils in China was a landmark discovery for archaeologists and anthropologists. Fragments of several fossils generically identical with those of the Applethwaite Beds are easily discoverable. Show More Sentences In marine environments, fossils often furnish excellent geochronometry from which relatively precise rate calculations are possible. Early fossils are all simple-celled prokaryotes such as bacteria and cyanobacteria. Investigators have suggested that these fossils represent new growth from cycads, deciduous trees, ginkgos and, most commonly, conifer trees. The scientists analysed fossils of gingkoes and ferns that were growing at the time to estimate the amount of carbon dioxide that was in the air. One is reminded of the famous fernlike markings on the Solnhofen fossils known as dendrites. By the Cretaceous, fossils with well-defined longitudinal ridges appear, as in modern species of Dentalium and its close relatives. Plant fossils of the lower Pease River Flora are preserved mainly as compressions and coalifications. The formation has yielded numerous fossils of stromatolites in addition to microfossils. Some of the fossils are proving pivotal in testing the hypothesis that birds are the living descendants of dinosaurs. When we do this we can use dinosaurs, fossils and DNA as tools to share the gospel of Christ. But there should be some mechanism that protects the rare fossils and the important sites that the science of palaeontology depends upon. The percentage method has also been used in studying these kinds of fossils in other regions of the Indo-Pacific. Insect palaeontology depends on assigning fossils to extant taxa usually on the basis of wing characters. The richest sources of diatom fossils are deposits of their skeletons known as diatomite, or diatomaceous earth. Later that year, after an earthquake, a new spring eye burst open, bringing to the surface fossils and stone tools. At the foot of the mountain, colourful fossils of shells and dinosaurs add a mysterious flavour to the place. He was also able to travel to Bloemfontein to compare the fossils with those of an early dinosaur in the National Museum. Because beetle elytra may be common fossils in Pleistocene deposits, they are often important sources of data on Pleistocene environments. There are also thousands of fossils of animals, such as colobus monkeys, pigs, birds, rodents, and even carnivores like hyenas and big cats. Assemblages are denned as coherent suites of plant fossils preserved in discrete lithological units. Show More Sentences It is in these layers that fossils of odd-toed ungulates, even-toed ungulates, and primates first appear. The reality is that fossils are being found in new places all the time but these finds do not cause evolutionists to doubt evolution. The occurrence higher in the succession of nummulites and neritic fossils indicates overall shallowing upwards. The fossils now give a branching and very bushy picture of equine evolution, with numerous now-extinct lineages living side by side. Lynn will receive training so she can excavate sites, remove fossils and artifacts, and carefully map the finds. In the nineteenth century, the definitions of the eras and systems of the geological column were based on fossils and sequences. There is more to paleontology than just using fossils to estimate the ages of rocks or their past environmental settings. Basic questions such as the chromosomal evolution or the phylogeny of these living fossils are still unresolved. Crab fossils were found within the lowest portion of the exposed Bahariya Formation in a blue-gray indurated shale. Until recently, the geosphere was studied primarily by mapping rocks, fossils and soils as they vary across the landscape. Many paleontologists study Pleistocene fossils in order to understand the climates of the past. Trace fossils provide important data on the paleoenvironmental distribution and behavior of extinct animals. An important aspect of palaeobotanical research is to unravel the palaeoecology of plant fossils to use the results in reconstructing ecosystems. Terrestrial deposits contain fossils ranging from Paleocene leaf imprints to Cretaceous dinosaur remains. These difficulties are compounded by the lack of trained paleobiologists who specialize on algae, or of phycologists who examine fossils. The phylogenetic and paleobiological significance of the new fossils is discussed. We seem to be witnessing a classic struggle in palaeoanthropology between the molecules and the fossils. Second, key morphological transitions, such as the purported change from paired fins to limbs with digits, remain undocumented by fossils. Thousands of soft-bodied animal fossils paint us a picture of Cambrian marine life. Answers to the ancestry question could come from studying hominin fossils from Africa, the researchers say. Show More Sentences Do hominid fossils from one to two million years ago represent a single species or numerous branches on the family tree, some of which died out? Based on fossils discovered in earlier digs, hominids appear to have lived in the area for nearly six million years. Teeth and jaw fossils of an early hominid were found with fossils of other animals. For a more reliable source, you need to be directly over the clay seam where the fossils are buried. The research is based on cetacean fossils representing four groups of early whales. As well as early fossils, there are displays of stuffed animals and birds, including a male and female Great Bustard. The C 1 calibration was based on the estimated ages of the three earliest putative cercopithecoid and hominoid fossils. However, in many reefal carbonates stromatoporoids are the only recognizable fossils available to the biostratigrapher. The stromatoporoids had massive calcareous skeletons that are preserved as rather conspicuous fossils. Among its surprises are a 96-yard par 3 and a series of back-nine holes in a strip mine of vertical limestone walls, outcroppings and fossils. Most fossils are replicas of bones, teeth, shells, and other hard, mineral-based tissues that resist decay. First and last occurrences of fossils seldom record the actual times of origination and extinction. The evolution of the cave bear and brown bear has been studied by analyzing both modern DNA samples and ancient DNA from fossils. Carboniferous and Permian strata often contain useful index fossils belonging to this group. All these fossils are stratigraphically below the Siesta palaeosol in a glacial sequence deposited on the lower Oliver Platform. And after identifying worker ants in several of the fossils, he believes that ants had already begun to specialize into castes. A number of fossils from the Cambrian have been described which look more or less like onychophorans. Some carnivorous dinosaurs routinely fed on their own species, according to an analysis of scarred fossils. The rhizomes, or root systems, of both genera, known as stigmariae, were thought to be distinct plants when their fossils were first discovered. He was studying a group of fossils sent to him by various collectors when he began to suspect he was seeing a new type of insect. Show More Sentences Fossils of the group are mostly Cenozoic, though some Permian and Carboniferous fossils are also known. And carbon dating isn't used to determine the age of the earth or of fossils, so it's pretty much irrelevant to the discussion. Some stromatolite fossils found in the Pilbarra region of northwestern Australia have been carbon-dated at around 3.5 billion years old! Both sites show evidence they once contained liquid water and might therefore harbor fossils of primitive life. The 1980s saw a marked lack of clear statements about the lack of transitional fossils, or criticism of claimed fossil series. Another theory was that fossils were nonliving imitations of living things, directly created by God. Directly observable from fossils, the ancestral cetacean also had a pachyostotic bulla and elongate molar shear facets. Its displays cover millions of specimens, including fossils, meteorites, mammals, plants, minerals, and insects. The ecological role and niche of coiled cephalopods can be studied by considering the common morphological characters of these fossils. In fact even Neanderthal fossils have been found at this site and at other locations nearby. Around the hall are galleries where minerals and fossils lie under sloping glass. A researcher at the University of Manchester has reported finding slit-like structures and book lungs on some eurypterid fossils. These living fossils are scavengers which share physical characteristics common to both sharks and true bony fish. Unlike with bony fish, only a handful of lamprey fossils have ever been found, because cartilage usually decays too fast to become fossilized. The oldest fossils of bony fish all come from marine waters, where fish presumably didn't have to worry too much about running low on oxygen. The occurrence of musk ducks as fossils in New Zealand is reviewed and updated. The types of scales that are present in fossils permit us to say something about the dermal musculature. The Napartulik fossils are mummified plant remains that were buried in a freshwater, low-oxygen environment that limited decay. On display are approximately twenty-two hundred minerals, nine hundred cut and uncut gems, and nine hundred fossils. North of the Burd Gol zone there is a small area of interbedded marine mudstone and limestone which reportedly contain Carboniferous fossils. Show More Sentences Corystosiren is a late-surviving dugong at a time when sirenian fossils are exceedingly rare in Florida. By adhering to the cover slips during mounting, most of the isolated, two-dimensional fossils were usefully oriented into a single focal plane. In May 1884 C.W. Marsh was sinking a trial shaft hoping to find gold but only found indications of fossils. Other fossils commonly found in the formation include Brachiopods, corals, moss animals, and Crinoids or sea-lilies. The Australian fossil record of monotremes also includes some quite good Miocene and Pleistocene fossils of giant echidnas. In most studies, bulk samples are sieved and all fossils of a specified size fraction are counted and identified. The majority of the fossils used for calibration of avian molecular clocks have uncertain phylogenetic relationships. As noted above, creationists do not have a really satisfactory explanation for the increasing modernness of fossils. This is the basic unit of biostratigraphy in which fossils are used in the correlation of rock units. These fossils include graptolites, trilobites, and various types of microfossils visible only under the microscope. Paleontologists behind some of these fossils believed they were the oldest snakes yet discovered and a missing link with mosasaurs. To avoid confusion with binomial nomenclature used in naming body fossils, trace fossils are named as ichnogenera and ichnospecies. Triassic asteroids are among the rarest of fossils, hitherto comprised of only three genera, all from Europe. A number of other minerals, including silica, may play a role, but some of the most spectacular fossils are preserved in pyrite. Pulmonate snails, millipedes, scorpions, spiders and mites were certainly present, but are not known from fossils. In addition any invertebrate fossils or trace fossils will be noted or collected if any new examples come to hand. Rhynie fossils were preserved when mineral sediments settled around and on top of the organic matter and compressed them. On display are minerals, fossils, meteorites, and some rocks, most of which are of reference quality. In contrast, metatherian fossils from the Late Cretaceous are exclusively from Eurasia and North America. In 1923 Sir Flinders Petrie found another cache of fossils at Qua, wrapped in linen and carefully stored in rock tombs. Show More Sentences It seeks to achieve the precise definition of systems, series, and stages by the use of fossils within the Phanerozoic rocks. Oligocene fossils of todies and motmots from Wyoming and France, for example, indicate that the current ranges of these two groups are relictual. Recognizable Ediacaran fossils are concentrated at the base of graded beds and are generally deformed bodies cast in erosional scours. The development of Skolithos trace fossils on the upper surface of some beds suggests periodical emergence into an intertidal zone. Some of these medusoid fossils show clear impressions of tentacles around their margins. While fossils of this species do not occur in Europe, archaeological finds suggest that it periodically inhabited the Mediterranean region. These fossils cover a period of around 30 million years, from the Sinemurian to the Bathonian. However, the fossil graveyard is a sedimentary basin where fossils would be concentrated. Except for a few small bone fragments, no fossils have been observed within the clasts or in the matrix. Rhombs of ferroan dolomite occur both in the fringe around the fossils and within the matrix of the concretion. Protruding from the frozen earth, like dinosaur fossils in a matrix of rock, was a row of brown vertebrae, ancient and massive. Limited dolomitization of the calcite around the edges of the fossils and in the matrix of the concretion occurred at a later stage. His study is so full of fossils and chemical apparatus of various kinds that there is barely room to sit down. We took off our climbing gear and started to fan out over the rocks, keenly searching for fossils. When pieces are stolen and smuggled out, sometimes blocks of fossils are matched together mistakenly. Some Late Precambrian Ediacaran fossils bear strong resemblances to colonial coelenterates called pennatulids, or sea pens. Furthermore, it is not always clear whether fossils from a given locality are from in situ rocks or from spoil or clasts in glacial drift. The fossils from the formation represent organisms that thrived during the Pliocene epoch, at the end of the Tertiary period. They were primarily studying the igneous rocks in the region but still managed to bag a few good fossils. Of great interest to Tennesseeans will be the display of fossils from the Gray Fossil Site. Show More Sentences It occurs as nodules and thin bands and sometimes replaces organic material in marine fossils. The proximity of vertebrate fossils to the crab fossils suggests that they may also have scavenged vertebrate carcasses. Some of the most attractively preserved fossils are the yellow and brown calcitic moulds of ammonites that are characteristic of calcareous concretions. Rocks of late Precambrian and early Paleozoic age have yielded a variety of tiny spine-like fossils of dominantly organic or weakly phosphatic composition. The badlands are significant due to the plethora of fossils and dinosaur bones that have been recovered in the slowly eroding hoodoos, narrow valleys and bone-dry coulees. Fossils of this group date back into the Jurassic, where they first become abundant, and some possible fossils of coccolithophores have been recovered from the Pennsylvanian. One possibility would be to look for preserved hyphae in Ediacaran fossils and in associated microbial mats, specifically hyphae with perforate cell walls. Cuticle was not preserved on the surfaces of the compressions, although surface features could be observed in parts of some fossils preserved as limonite petrifactions. Petrified wood and fossils are evident during backcountry hikes away from the river, but remember to take only pictures and leave only footprints. This is partially due to the heavy load our lab must bear in its normal operation, and partly due to carbon dating's notorious inaccuracy in fossils of recent geologic record. Quasimodaspis, along with the inarticulate brachiopods that are the only other fossils so far recovered from this locality, was probably transported from a shallower facies. Preservation of fossils in the lower part of the Benbolt Formation was enhanced by periodic influxes of terrigenous mud, which also facilitate collection and cleaning. A few were very competent in geology, both as a result of extensive reading and field study of geological formations and fossils in Britain and in Europe. We have virtually no fossils of tropical fleshy algae, especially the small soft epilithic species that characterize primary productivity on modern reefs. During that time new hominid fossils have been discovered in Africa. Very few dinosaur fossils are actually found near this boundary. The oldest true vertebrate fossils date back 530 million years. In addition to their possible connection with Brown's discovery, these T. rex fossils also were found to contain coprolites, fossilized remains of the dinosaur's last meal. Bass suggested that the fossils might represent fructifications of angiosperms or gymnosperms, or perhaps both, but said formal identifications had not been made. So we're going to look at dating fossils and we're going to talk about dating the earliest human remains in Australia and how accurate those datings are. Show More Sentences Such studies permitted taxonomic identification of morphologically depauperate fossils as a prerequisite to assembling databases for biodiversity studies. Earlier, Witmer and others had performed a similar study on fossils of the flying reptiles called pterodactyls, which are not related to Archaeopteryx. These fossils constitute a gradation between Neandertals and modern humans, demonstrating that the distinction made by evolutionists is an artificial one. On the other hand, in the grey-pink argillaceous levels, fossils are much more better preserved, although slightly distorted or weakly diagenetically flattened. Other marine fossils commonly found throughout the Silurian record include trilobites, graptolites, conodonts, corals, stromatoporoids, and mollusks. The fossils had been collected in the early 1840s in pits dug to provide material for the embankments to carry Brunel's Great Western Railway from London to Bristol. These fossils are from a time when the warm equable climate of the early Eocene was changing to the cooler more seasonal climates that we know today. Attachment cones of the latter type are likely to be extensively contaminated with extraneous material, even if the fossils are well preserved and unaltered. The confidence on fossils to determine the relative age of strata was so strong that the necessity to confirm their relative age based on the law of superposition was thought unnecessary. Locally, some index fossils can be correlated with absolute age dates that are slightly older or slightly younger than the upper and lower age limit of the time slice. The earliest fossils of anatomically modern humans are from about 200,000 years ago. The majority of fossils recovered from the site are acanthodian fish belonging to Mesacanthus and Ischnacanthus with occasional Euthacanthus, Parexus and Climatius. The slab of crust containing the deposit and its assemblage of vent fossils was then translated northeastwards on the Farallon Plate and accreted to its present location. The Cambro-Ordovician boundary is now radiometrically dated at 490 Ma and so only rocks and fossils of late Cambrian age are included in this part of our survey. Early in the 1800s, experts had agreed upon a vast age for the Earth and for life forms found in fossils, later reinforced by techniques like radiometric dating. The black market trade in fossils stolen from the richest Cretaceous fossil locality in the world has prompted a crackdown. In fact there is a great deal at Riversleigh that is more complex than just the fossils of koalas and wombats and kangaroos and other weird creatures. Consequently, the extant data imply that the small size of these fossils does not rule out a woody habit or low-light, closed forest habitats, as some have argued. The young-Earther proposes that the sequence of fossils represents the differing abilities of animals to avoid the rising flood waters in the time of Noah. The children have dug up fossils of ammonites from millions of years ago. Show More Sentences The scientists were able to extract sufficient DNA from the roots, and they did indeed find the virus fossils. And if the fossils go to a private collector, they are effectively lost to paleontology and the public for good. The living armadillos of South America bore a striking resemblance to fossil glyptodonts, extinct armored mammals whose fossils occurred in the same area. What clues from the rock record or the fossils themselves might tell you whether a fossil assemblage was autochthonous, transported only a little bit, or truly allochthonous? To do so requires a careful look at the many current problems presented by Cambrian fossils, including those stemming from systematics, taphonomy and dating. Smilodon fossils from the La Brea tar pits include bones that show evidence of serious crushing or fracture injuries, or crippling arthritis and other degenerative diseases. Not only that, but much of the land in this region of Wyoming is owned by ranchers who know the terrain like the back of their hand, and have become adept at spotting fossils. Last Sunday, 60 Minutes aired a remarkable story about the discovery of two hominid fossils in South Africa. Analysis of these fossils showed the ancient creature to be a small mammal, possibly distantly related to the modern scaly anteater known as the pangolin. Fossils are also featured in art as in the use of petrified wood for ornaments or the more general inspiration provided by fossils in painting and sculpture. To his surprise, fossils within the matrix were also silicified. Mayor researched paleontological finds in the Gobi and discovered that some of the most abundant fossils there belong to Protocerotops, a beaked dinosaur. Like the Tapara bed, it contains some shelly material and molds, but the most readily recoverable and complete fossils are present in cobble-sized concretions. Mesosaur fossils appear suddenly in the fossil record, and disappear equally suddenly, and their fossils show no sign of evolution during their existence. The junk itself is a collection of fossils from our evolutionary history, which makes it interesting in the same way that a midden is interesting to archeologists. Where is the evidence of fossils being millions of years old? A few mineralized animal fossils, including sponge spicules and probable worm tubes, are known from the Vendian period immediately preceding the Cambrian. Understanding of how mineralized materials formed leads to deciphering complex microstructures or diagenetic changes that have occurred in our fossils. The team of bioarchaeologists used a newly refined technique of amino acid analysis that measures the deterioration of proteins in fossils found close to the tools. It seems these days that there are precious few ordinary human or ape fossils unearthed, rather they all have to be a missing link between the two. Show More Sentences Rates of sediment accumulation, differential bioturbation and preservational processes may also have influenced the final diversity of fossils in the rocks. The presence of vestimentiferan tube worm fossils in the Figueroa deposit is at odds with the supposed time of origin of the modern vestimentiferans, based on molecular data. Bedding planes in the enclosing limestones do not bend around the nodules, and any brachiopods, corals, or other fossils that are in them have been silicified. According to Dr. Norell, the American Museum of natural history has a strict policy regarding suspect fossils. The temporal distribution of first appearances of sinistral clades as documented by fossils generally differs from that of clades with a labral tooth. The fossils are found in siltstone and mudstone under limestone. When falling into water this ash instantly cements as sodium carbonate and, in this alkaline environment, bone apatite and calcium carbonate fossils are relatively insoluble. In Proterozoic carbonaceous fossils, ultrastructural and biochemical characters are unavailable, and anatomical and reproductive structures are uncommon. Trace fossils are concentrated towards the base of the member, where preferential cementation of the bioturbation has resulted in prominent erosion-resistant horizons. The already diverse and abundant record of dinosaur skeletal fossils was increased by the discovery in 1999 of the first evidence of pachycephalosaurs from this region. Although some marine fossils more than 500 million years old sport holes, many paleontologists have been hesitant to say these are signs of predators, says a paleoecologist. These fossils help scientists to date the core and to understand the depositional environment in which the rock units formed. Many fossils of the Late Jurassic Plesiocidaris still have the spines attached. Trace fossils are the remains of the activity of an animal, such as preserved trackways, footprints, fossilised egg shells, and nests. More revealing, and in many places more common, than bones are trace fossils that don't contain any remnants of body parts. Martin previously discovered the trace fossils of non-avian dinosaur burrows, including at a site along the coast of Victoria. The significance of trace fossils in sedimentology, stratigraphy and palaeoecology with examples from Lower Palaeozoic strata. Most echinoid fossils are often abundant in the restricted localities and formations where they occur. Cidaroids have changed very little since the Late Triassic and are today considered to be living fossils. Among the fossils are a variety of creatures from sponges, worms and nautiloids to solitary hydroids, also known as the flowers of the sea. Show More Sentences Crocodiles are living fossils that haven't changed their appearance much in millions of years. The oldest modern polecat fossils occur in Germany, Britain and France, and date back to the Middle Pleistocene. The oldest alcid fossil is Hydrotherikornis from Oregon dating to the Late Eocene while fossils of Aethia and Uria go back to the Late Miocene. The fossil record includes a progression from early biogenic graphite, to microbial mat fossils, to fossilized multicellular organisms. It is marked by a sudden abundance of hard substrate trace fossils such as Trypanites, Palaeosabella, Petroxestes and Osprioneides. On the surface I have found common fossils of clams, gastropods, shrimp tunnels and tube worms. This second period of the Paleozoic era created abundant fossils that became major petroleum and gas reservoirs. The evidence came in the form of fossils of the Greater Noctule found in the excavation site at Abric Romani in Barcelona. In the Italian Renaissance, Leonardo Da Vinci made various significant contributions to the field as well designed numerous fossils. This led the scientists to deduce that a protozoan parasite was to blame for the diseased jawbones seen in many tyrannosaurid fossils. However, misleading results are produced if the index fossils turn out to have longer fossil ranges than first thought. Such index fossils must be distinctive, be globally distributed and have a short time range to be useful. Consequently, paleontologists must usually rely on stratigraphy to date fossils. Based on his microscopic observations of fossils, Hooke was an early proponent of biological evolution. It is also the site that revealed the first co-occurrence of insects in amber and dinosaur fossils that inspired many Hollywood blockbusters. Beds that preserve fossils typically lack the radioactive elements needed for radiometric dating. The chalk has many fossils, and bands of flint occur throughout the formation. You can tell he's completely in his element when he's talking about fossils. A substantial hurdle to this aim is the difficulty of working out how old fossils are. Geochemical observations may help to deduce the global level of biological activity, or the affinity of certain fossils. Show More Sentences In 1994 and 1995, 80 fossils of six individuals who may have belonged to the species were found in Atapuerca, Spain. Invertebrate paleontology deals with fossils of invertebrates such as molluscs, arthropods, annelid worms and echinoderms. Vertebrate paleontology concentrates on fossils of vertebrates, from the earliest fish to the immediate ancestors of modern mammals. The island is one of the most important areas in Europe for dinosaur fossils. So far, the earliest fossils of the alligator's family, the crocodilians, have been found in rocks from near the end of dinosaur days. This technique is used to date sequences that generally lack fossils or interbedded igneous rocks. Kenyanthropus displays bone cracking and twisting comparable to that in the most distorted oreodont fossils, White contends. Trace fossils and predatory borings in Cloudina shells provide further evidence of Ediacaran animals. Trace fossils from Late Pleistocene varved lacustrine sediments in eastern Lithuania. Some Cambrian trace fossils indicate that their makers possessed hard exoskeletons, although they were not necessarily mineralised. Minimum age constraints were imposed based on two fossils, and the vicariant split between Palearctic and Nearctic Timarchini. The samples were black shale, and on the shales were some ancient fossils called graptolites. The layers of the Doushantuo formation from around 580 million year old harbour microscopic fossils that may represent early bilaterians. In the 1970s, analyses of pachycephalosaur fossils revealed large numbers of bony fibers within the crown of the skull. The Ordovician hardgrounds and their bioerosional trace fossils are best known in North America. Our picture of Precambrian marine diversity is dominated by small fossils known as acritarchs. Or is it the result of the massive consumption of the fossils that gave off the ozone? Also, many traces date from significantly earlier than the body fossils of animals that are thought to have been capable of making them. Don't be discouraged, Dave Rudkin, a palaeobiologist at the ROM, says many important fossils in Ontario have been found by amateurs. Fossilization is a rare event, and most fossils are destroyed by erosion or metamorphism before they can be observed. Find more words! 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What is the opposite of fossils? Words that rhyme with fossils What is the adjective for fossils? What is the noun for fossils? Use our Sentence Generator Nearby Words fossil record fossilized fossilize fossilization fossilised fossilise fossil water fossor fossorial foster Foster fosterage 7-letter Words Starting With f fo fos foss fossi fossil