21. Therefore, periglacial environments are anywhere that freezing and thawing modify the landscape in a significant manner. 22. Sediments, boulders and sands in the cave appear to be from a periglacial or subglacial origin. 23. This contrasted sharply with the views of others that tors are essentially arctic features produced by periglacial processes. 24. This concept contrasts with periglacial processes, which are directly driven by formation or melting of ice or frost. 25. Intense freezing and thawing during the Pleistocene periglacial period slowly shattered the walls, much like breaking tempered glass. 26. String bogs are features associated with periglacial climates, where the temperature results in long periods of subzero temperatures. 27. These moraines are morphologically quite different from the very widespread stone runs, which are the result of periglacial processes. 28. Periglacial processes, such as cryoturbation and stone stripping, occur on Level Mountain at elevations greater than } }.29. Also paleo-soils as well as eolian and periglacial landforms and sediments may be used to find correlations between terraces. 30. There are no indications that Cwm Craf on its northern side held a glacier but it is perhaps periglacial in origin.
