sedimentary rock


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sedimentary rock:

see rockrock,
aggregation of solid matter composed of one or more of the minerals forming the earth's crust. The scientific study of rocks is called petrology. Rocks are commonly divided, according to their origin, into three major classes—igneous, sedimentary, and metamorphic.
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; sedimentsediment,
mineral or organic particles that are deposited by the action of wind, water, or glacial ice. These sediments can eventually form sedimentary rocks (see rock).
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sedimentary rock

[¦sed·ə¦men·trē ′räk]
(petrology)
A rock formed by consolidated sediment deposited in layers. Also known as derivative rock; neptunic rock, stratified rock.

sedimentary rock

Rock, such as limestone or sandstone, which is formed from materials deposited as sediments, in the sea or fresh water, or on the land. Also see stratified rock.
References in periodicals archive ?
Sedimentary rocks of FG (Jurassic) have Mississippi valley type (MVT) and Sedex type sulphide mineralization, in which Zn, Pb, Cu and barite are important.
This unit corresponds to the geomorphological unit of Alto Parnaiba Chapadoes, which is composed by sedimentary rocks that are cut by a major system of fractures and are the valley elements.
While the pyroclastic volcanic igneous rock and the carbonate dominated Permian sedimentary rocks are quartz-poor, almost void, the Triassic sedimentary rock largely composed of sandstone is quartzrich.
Sedimentary Rocks. Density of sedimentary rocks depends on the density of their compositional minerals, porosity, and the density of filling liquid and gas [19].
SEDIMENTARY ROCK: Formed when layers of sediment are squeezed and cemented together.
Most of Earth's continents are made of granite, which over millions of years has been broken down, transported and deposited as sedimentary rock. Under the crust's sedimentary and granite rock layers is a denser rock called basalt, which lies above Earth's thick, sedimentary mantle.
A mainstream theory suggests that 65 million years ago, pressures beneath the Earth's surface reached a climax, pushing through the ground with enough force to create the Rocky Mountains, the Black Hills, and a stream of molten magma that intruded into sedimentary rock layers, thus forming this monument.
Thirty one real sedimentary rock samples were taken from the Silesian Unit (Tesin-Hradiste Fm., Hradiste Lower Cretaceous, Lower Barremian) from the depth 170-230 m.
To the uninitiated, it is hard to imagine that flood geologists regard the Grand Canyon, with its thousands of feet of layers of sedimentary rock deposited over the eons, as a suitable icon.
The composite sequence of sedimentary rock on the Earth, supposedly deposited by the Noachian Flood, approaches 100 miles thick.
One example of a sedimentary rock that forms this way is sandstone.