31. The results of this unique freeze-thaw cycle are customarily found in Arctic periglacial regions of Eastern Siberia and Alaska. 32. In addition to periglacial and coastal refugia, there were also possible areas of embedded refugia in Patagonia and New Zealand. 33. They originated mainly under periglacial conditions, i . e . during the course of the ice ages, and their retreat. 34. These barren block fields occur in periglacial environments where outcrops of resistant rock are exposed with a slope of less than 25? 35. This is mainly due to erosion during the sustained permafrost and tundra like conditions in the periglacial zones of multiple ice ages. 36. Brickearths are periglacial loess, a wind-blown dust deposited under extremely cold, dry, peri-or postglacial conditions. 37. Many of the landforms resemble periglacial features seen on Earth, such as moraines, ice-wedged polygons, and pingos. 38. Periglacial boulder fields are present on both sides of the water gap, and the boulders are formed of the Silurian Tuscarora Formation.39. Periglacial phenomena are observed on Llullaillaco, commencing at altitude and reaching their maximum around on the Chilean and on the Argentine side.40. This is material which drifted down the slope which we have followed, while it was under the water of the Devensian periglacial lake.
