| Sandstone-filled cracks exposed at the unconformity are viewed as periglacial frost fissures. |
|
| These may be of fluviatile, glacial, periglacial, lacustrine, aeolian, or marine origin. |
|
| These were carved on a large earthfast boulder situated on a natural lynchet that follows the line of a periglacial feature. |
|
| Glacial, periglacial, fluvial, and mass-movement processes dominate in mountain environments. |
|
| The occurrence of ventifacts and frost fissures implies a cold, windy periglacial climate. |
|
| On a smaller scale, the periglacial landscape possesses a diversity of patterned ground phenomena, including circles, stripes, and nets. |
|
| Hence the cracks probably developed following glacial retreat when the area containing the eroded surface of Bedford Sandstone was in a periglacial setting. |
|
| Preserved sediments record deposition in a periglacial to ice-margin lake that contains one of the earliest assemblages of freshwater arthropods from Gondwana. |
|
| Similar laminated deposits are formed in more distal periglacial lakes. |
|
| Severe conditions in a periglacial tundra with the predominance of cryophytes, cryophytes of the fern and club moss group disappeared completely. |
|
| Gelifluction is prominent in periglacial regions where snow falls during six to eight months of the year. |
|
| In periglacial climates a patterned form of blanket bog may occur, known as a string bog. |
|
| The Fms are unusual in that many of them are periglacial sandstones often sealed by glacial tillites. |
|
| The major elements of the study area's relief are represented by planation surfaces, glacial and periglacial landforms. |
|
| Many Fms are periglacial sandstones sealed by glacial tillites. |
|
| The mammoth steppe was a periglacial landscape with rich herb and grass vegetation that disappeared along with the mammoth because of environmental changes in the climate. |
|
| Periglacial environments occur not only in high latitudes and in tundra regions, as defined by Lozinzki, but also below the treeline. |
|
