| In recent years radiometric dating of volcanic lavas, particularly in North Germany, has been used to redefine the PermianCarboniferous boundary. |
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| The San Juan Member is late Oligocene based upon biostratigraphy and radiometric dating. |
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| For radiometric dating we selected from each zircon concentrate about 10-20 clean crystals with neither fractures nor inclusions. |
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| A drawback is that the U content of the titanites is very low, making radiometric dating difficult. |
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| Here, rifting took place in the Early Griesbachian and the Late Griesbachian, respectively, based on ammonoid data and radiometric dating. |
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| An attempt to resolve the chronological debate regarding Baehr-Gust has been made through stratigraphic analysis and radiometric dating. |
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| Samples for radiometric dating were collected after the main magnetostratigraphic units were defined in the field. |
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| The age of the Ordovician boundaries were determined using potassium-argon and uranium radiometric dating. |
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| As an old earth creationist, he accepts the validity of radiometric dating and the ancient age of life on earth. |
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| Of these artifacts, the material best suited for radiometric dating was a set of bone awls. |
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| With the advent of radiometric dating methods, absolute ages for various periods can be determined. |
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| The main assumption of radiometric dating is that the decay rates are constant with time. |
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| Scientists have realized that there are difficulties in dealing with the assumptions of radiometric dating. |
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| The RATE group is a creation science research team focused on the problems with radiometric dating. |
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| However, research by creationists has revealed a large number of problems with radiometric dating. |
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| Crude chronologies of these rocks of the Precambrian Eon are provided by different radiometric dating techniques. |
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| What is interesting about chondrules is that radiometric dating has put them among the first solids to have formed in the solar nebula. |
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| Geologists have broken this enormous length of time into major divisions using fossil assemblages and radiometric dating of rocks. |
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| More researchers are using a mix of both AMS and radiometric dating in order to properly answer the complex questions posed by their research. |
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| Patterson used radiometric dating, specifically U-Pb dating, to determine the age of the Canyon Diablo meteorite in the early 1950s and that date was 4.55 billion years old. |
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| Recruited to join a research project on the Earth's magnetic field, Dalrymple came to the USGS in 1963 to establish a laboratory for precise radiometric dating of rocks. |
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| 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. |
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| The inclusions crystallize at the same time as the host diamond and incorporate trace elements such as samarium and neodymium, which may be used for radiometric dating. |
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| Using radiometric dating techniques, the crystals were dated at up to three billion years old. |
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| Because fission-track dating requires a manual count of the fission tracks, the process is more prone to human error and bias than other radiometric dating methods. |
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| Subsequent fieldwork, metamorphic studies and radiometric dating has refined their chronology but supported their original hypothesis. |
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| By the early 20th century, radiometric dating allowed the Earth's age to be estimated at two billion years. |
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| Scientists have linked crater density to age for locations on the moon using radiometric dating of samples from Apollo missions. |
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| According to radiometric dating and other sources of evidence, Earth formed over 4 billion years ago. |
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| Beds that preserve fossils typically lack the radioactive elements needed for radiometric dating. |
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| The RATE research group investigates the validity of radiometric dating. |
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| Paleontologists have for years painstakingly collected fossils from these sites, and worked to precisely determine their ages using radiometric dating. |
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| There is special emphasis on how recent advances in radiometric dating, functional morphology, molecular biology, and archaeological inference have impacted the field. |
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| Students were asked questions about superposition and radiometric dating. |
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| A terminology has evolved covering the early years of the Earth's existence, as radiometric dating has allowed real dates to be assigned to specific formations and features. |
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| Both dates are gaining accuracy by using more accurate forms of radiometric dating, in particular the decay of uranium to lead in zircons formed at time of the impact. |
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| The development of radiometric dating techniques in the early 20th century allowed scientists to quantitatively measure the absolute ages of rocks and the fossils they host. |
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| The paint-analysis technique may provide an inexpensive alternative to other methods of determining the age of archaeological sites, such as radiometric dating of artifacts. |
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| Radiometric dating of lava flows has been used to establish a geomagnetic polarity time scale, part of which is shown in the image. |
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| Radiometric dating has shown these metasediments to be of Paleoproterozoic age, similar to the rocks of the Loch Maree Group. |
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