dune cross-bedding

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• 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

• 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

• Opportunity — Mars Rover Opportunity (MER B), künstlerische Darstellung NSSDC ID 2003 032A Missionsziel Mars, Meridiani Planum Auftraggeber NASA …   Deutsch Wikipedia

• Aeolian processes — Aeolian (or Eolian or Æolian) processes pertain to the activity of the winds and more specifically, to the winds ability to shape the surface of the Earth and other planets. Winds may erode, transport, and deposit materials, and are effective… …   Wikipedia

• MER-B — Mars Exploration Rover, Künstlerische Darstellung Opportunity im Endurance Krater, künstlich generiertes fotorealistisches Bild …   Deutsch Wikipedia

• Geology of the Capitol Reef area — [ Waterpocket Fold is the major geographic feature in the area of the park. This view is from above Capitol Reef Scenic Drive looking back at the west face of the broken and eroded fold.] The exposed geology of the Capitol Reef area presents a… …   Wikipedia

• Triassic Period — Interval of geologic time, с 248–206 million years ago, that marks the beginning of the Mesozoic Era. Many new vertebrates emerged during the Triassic, heralding the major changes that were to occur in both terrestrial and marine life forms… …   Universalium

• Geology of the Grand Canyon area — The geology of the Grand Canyon area exposes one of the most complete sequences of rock anywhere, representing a period of nearly 2 billion years of the Earth s history in that part of North America. The major sedimentary rock layers exposed in… …   Wikipedia

• Shoal — Bar (landform) redirects here. For other uses, see Bar (disambiguation)#Landforms. Sandbank redirects here. For other uses, see Sandbank (disambiguation). For other uses, see Shoal (disambiguation). Sandbar between St. Agnes and Gugh on the Isles …   Wikipedia

• Meander — For other uses, see Meander (disambiguation). A hypothetical stream bed following a tilted valley. The maximum gradient is along the down valley axis represented by a hypothetical straight channel. Meanders develop, which lengthen the course of… …   Wikipedia

• pyroclastic surge deposit — GLOSSARY OF VOLCANIC TERMS Pyroclastic deposits that are left by pyroclastic surges. These deposits mantle topographic features but also generally thicken within topographic depressions. These deposits are generally well sorted, and are enriched… …   Glossary of volcanic terms