rafted erratics

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• Touchet Formation — The Touchet Formation (also referred to as Touchet beds) consists of large quantities of gravel and fine sediment which overlays several thousand feet of volcanic basalt of the Columbia River Basalt Group. These Touchet beds are often covered by… …   Wikipedia

• Glacial erratic — [ Doane Rock, at Cape Cod National Seashore] A glacial erratic is a piece of rock that deviates from the size and type of rock native to the area in which it rests; the name is based on the errant location of these boulders. These rocks were… …   Wikipedia

• quaternary — /kwot euhr ner ee, kweuh terr neuh ree/, adj., n., pl. quaternaries. adj. 1. consisting of four. 2. arranged in fours. 3. (cap.) Geol. noting or pertaining to the present period of earth history, forming the latter part of the Cenozoic Era,… …   Universalium

• sedimentary rock — Rock formed at or near the Earth s surface by the accumulation and lithification of fragments of preexisting rocks or by precipitation from solution at normal surface temperatures. Sedimentary rocks can be formed only where sediments are… …   Universalium

• Willamette Valley — This article is about the geographic feature. For other uses, see Willamette Valley (disambiguation). Willamette Valley Valley Farmscape in northern Polk Cou …   Wikipedia

• Missoula Floods — Glacial Lake Columbia (west) and Glacial Lake Missoula (east) are shown south of Cordilleran Ice Sheet. The areas inundated in the Columbia and Missoula floods are shown in red …   Wikipedia

• Interstate Park — For other places with the same name, see Breaks Interstate Park. Coordinates: 45°23′30″N 92°39′55″W / 45.39167°N 92.66528°W / …   Wikipedia

• Dropstone — Examples of dropstones from the Eocene, when it has been suggested that there were no ice sheets.[1] Dropstones are isolated fragments of rock found within finer grained water deposited sedimentary rocks. They range in size from small pebbles to… …   Wikipedia

• Pleistocene Epoch — Earlier and longer of the two epochs that constitute the Quaternary Period. The Pleistocene began с 1.8 million years ago and ended с 10,000 years ago. It was preceded by the Pliocene Epoch of the Tertiary Period and followed by the Holocene… …   Universalium