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In geology, exhumation is the process by which a parcel of buried rock approaches Earth's surface. [ 1 ] It differs from the related ideas of rock uplift and surface uplift in that it is explicitly measured relative to the surface of the Earth, rather than with reference to some absolute reference frame, such as the Earth's geoid .
Example of the application of identifying geological structures and rock contacts using aerial photographs. The black dash lines refer to some local faults which are determined according to the photo-lineaments. The yellow area is the deposits. The pale blue area is volcanic rock. The blue area (bottom right) is rhyolite. The pink area is granite.
Examples of such islands are found in the Pacific, notably the three phosphate islets of Nauru, Makatea, and Banaba, as well as Maré and Lifou in New Caledonia; Fatu Huku in the Marquesas Islands; and Henderson Island in the Pitcairn Islands. The uplift of these islands is the result of the movement of oceanic tectonic plates.
Exhumation, or disinterment, is the act of digging something up, especially a corpse. This is most often done to relocate a body to a different burial spot; families may make this decision to locate the deceased in a more pertinent or convenient place.
Tectonic Burial is the deformation of rocks caused by extreme pressure over millions of years. [1] It often causes temperature evolutions and deep burials. [2] Tectonic burial is usually the result of continental collisions or subduction in a region. [3]
A low-angle fault forms and is ready to act as décollement. Then, the upper crust is thinned above the décollement by normal faulting. New high-angle faults control the propagation of the décollement and help crustal exhumation. Finally, major and rapid horizontal extension lifts the terrain isostatically and isothermally. A décollement ...
Also called Indianite. A mineral from the lime-rich end of the plagioclase group of minerals. Anorthites are usually silicates of calcium and aluminium occurring in some basic igneous rocks, typically those produced by the contact metamorphism of impure calcareous sediments. anticline An arched fold in which the layers usually dip away from the fold axis. Contrast syncline. aphanic Having the ...
The basin-fill occurs concurrently with the exhumation. Calculations examining sediment infill suggest that differences in core complexes can be controlled by erosion rates and hanging wall resistance of the fault. [9] Tilted blocks are formed under specific crustal conditions, where the lower crust is relatively warm, not hot.