In geology, a dome is a deformational feature consisting of symmetrically-dipping anticlines; their general outline on a geologic map is circular or oval. "Glacial" and "Glaciation" redirect here For the geological periods see Glacial period. Half Dome is a Granite dome in Yosemite National Park, located at the eastern end of Yosemite Valley — possibly Yosemite's most familiar sight A granite dome is a dome of Granite, formed by exfoliation. Formation Granite forms Plutons of Igneous rock Geology (from Greek γη gê, "earth" and λόγος Logos, "speech" lit In Structural geology, an anticline is a fold that is convex up and has its oldest beds at its core A map is a visual representation of an area—a symbolic depiction highlighting relationships between elements of that space such as objects, Regions, and Themes The strata in a dome are upwarped in the center; if the top of a dome is eroded off, the result will be a series of concentric strata that grow progressively older from the outside-in, with the oldest rocks exposed at the center. Many geologic domes are too large to be appreciated from the surface, and are apparent only in maps. Well-known regional structural domes include the Llano Uplift and the Ozark Dome. The Llano Uplift is a roughly circular geologic dome of Precambrian rock primarily Granite, in Central Texas in the United States [1]
Domes formed by intrusives
Localized domes may be formed when magma forms a shallow intrusion warping the overlying strata. Magma (Plurals magmas and magmata) is molten rock that sometimes forms beneath the surface of the Earth (or any other Terrestrial planet In Geology and related fields a stratum (plural strata) is a layer of rock or Soil with internally consistent characteristics that distinguishes An example would be the laccolith domes of the Henry Mountains of southeastern Utah. A laccolith is an Igneous intrusion (or concordant Pluton) that has been injected between two layers of Sedimentary rock. The Henry Mountains are located in the southeastern portion of the U The State of Utah (ˈjuːtɔː or) is a western state of the United States. Salt domes are formed above a diapiric intrusion of low density evaporite rocks. A salt dome is a type of structural dome formed when a thick bed of Evaporite minerals (mainly salt or Halite) found at depth intrudes vertically into A diapir (ˈdaɪəpɪər) ( French, from Greek diapeirein, to pierce through is an Intrusion caused by Buoyancy and Pressure Evaporites (iˈvæpəraɪt are water-soluble Mineral sediments that result from the Evaporation of bodies of surficial Water.
See also
References
- ^ Monroe, James S. In Structural geology, an anticline is a fold that is convex up and has its oldest beds at its core A structural basin is a large-scale structural formation of rock strata formed by tectonic warping of previously flat lying strata. A granite dome is a dome of Granite, formed by exfoliation. Formation Granite forms Plutons of Igneous rock A petroleum reservoir or an oil and gas reservoir (or system) is a subsurface pool of Hydrocarbons contained in porous In Geology, a resurgent dome is a dome formed by swelling or rising of a Caldera floor due to movement in the Magma chamber beneath it A salt dome is a type of structural dome formed when a thick bed of Evaporite minerals (mainly salt or Halite) found at depth intrudes vertically into , and Reed Wicander. The Changing Earth: Exploring Geology and Evolution. 2nd ed. Belmont: Wadsworth Publishing Company, 1997. ISBN 0-314-09577-2
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