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A concretion is a hard, ... For example, concretions in ... In addition to providing information about the orientation of past fluid flow in the host rock, ...
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 ...
Concretion – Compact mass formed by precipitation of mineral cement between particles; Diagenesis – Physico-chemical changes in sediments occurring after their deposition; Lithology – Description of the physical characteristics of a rock unit; Parent rock – Original rock substratum; Petrifaction – Process of fossilisation
This is also important, for example, in the Grand Canyon of the Colorado River, to rebuild shoreline habitats also used as campsites. Sediment discharge into a reservoir formed by a dam forms a reservoir delta. This delta will fill the basin, and eventually, either the reservoir will need to be dredged or the dam will need to be removed.
Minute bubbles of fluid are often trapped within the crystals of the cementing material. These fluid inclusions provide direct information about the composition of the fluid and the pressure-temperature conditions that existed during diagenesis of the sediments. Some analyses of connate water samples from Louisiana (USA) compared to seawater
An example of this case is a hot, vertical flate plate with a horizontal flow, e.g. the surface of a solar thermal central receiver. While the free stream continues its motion along the imposed direction, the boundary layer at the plate accelerates in the upward direction.
Evidence that this mastodon was processed and cooked includes the presence of two sandstone knives with worked edges that were used to cut meat and/ or remove hide. A concretion representing a congealed mass of viscous fluid replaced by minerals, may represent fat drippings produced by cooking with fire.
Secondary structures include fluid escape structures, formed when fluids escape from a sedimentary bed after deposition. Examples of fluid escape structures include dish structures , pillar structures, [ 7 ] and vertical sheet structures.