paleocurrent direction

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• paleocurrent — noun A geological feature that indicates the direction of flow of water in the geologic past …   Wiktionary

• Cross-bedding — Crossbedding of sandstone near Mt. Carmel road, Zion Canyon, indicating wind action and sand dune formation prior to formation of rock (NPS photo by George A. Grant, 1929) …   Wikipedia

• The Hagerman Horse Quarry — The Hagerman Fossil Beds National Monument is located west of Hagerman, Idaho at the geographic division of the Snake River Plain. The Hagerman Horse Quarry is an integral part of the monument and is located on the northern flank of Fossil Gulch… …   Wikipedia

• Parting lineation — Parting lineation, from lower right to upper left; Kayenta Formation, Canyonlands National Park Parting lineation (also known as current lineation or primary current lineation) is a subtle sedimentary structure in which sand grains are aligned in …   Wikipedia

• 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

• Imbricated — Imbricate refers to clastics sediments that are laid down with a preferential orientation of the composing grains. [Pettijohn, F. J., 1957, Sedimentary Rocks, Harper and Row, Second Edition p. 78] This is most often applied to conglomerates and… …   Wikipedia