sedimentary rock
sedimentary rock Rock formed by the deposition and compression of mineral and rock particles, but often including material of organic origin and exposed by various agencies of
denudation. Sedimentary rocks may be classified as terrigenous (i.e. derived from the breakdown of pre-existing rocks exposed on the land), organic (i.e. produced either directly or indirectly by organic processes such as shell production or
peat formation), chemical (i.e. produced by precipitation from water, e.g. some
carbonates and all
evaporites), or volcanogenic (
pyroclastic, e.g.
tuffs and
bentonites). They may also be described according to their chemical properties and behaviour and their environmental deposition, and each scheme complements the others.
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Geochemistry of Sediments and Sedimentary Rocks: Evolutionary Considerations to Mineral Deposit-Forming Environments.(Book Review)
Magazine article from: Geoscience Canada; 9/1/2004; ; 700+ words
; ...the geochemistry of sedimentary rocks, especially their...radiogenic isotope and whole rock chemical composition...geochemistry of sedimentary rocks" is an overview of the current status of sedimentary geochemistry with emphasis...effects of weathering, sedimentary sorting and ...
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Nd isotopic and geochemical constraints on provenance of sedimentary rocks in the eastern Officer Basin, Australia: implications for the duration of the intracratonic Petermann Orogeny
Magazine article from: Journal of the Geological Society; 5/1/2005; ; 700+ words
; ...from Neoproterozoic to Cambrian sedimentary rocks in the intracratonic eastern...constraining the provenance of sedimentary rocks within it. This paper...Neoproterozoic to Ordovician sedimentary interval of the eastern Officer...
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NEW PIECE OF CLIMATE CHANGE PUZZLE FOUND IN ANCIENT SEDIMENTARY ROCKS BY UMASS AMHERST RESEARCHERS
News Wire article from: US Fed News Service, Including US State News; 7/23/2008; 700+ words
; ...course of one year, the rock samples had lost approximately...release of carbon from sedimentary rocks by soil bacteria, which...meets the weathered rock," says Petsch. According...organic material from sedimentary rocks contributes approximately...
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Microbes in hot springs might help in dating of sedimentary rocks
News Wire article from: The Hindustan Times; 1/23/2008; 605 words
; ...might help in the dating of sedimentary rocks. For the research...communities and the growth of sedimentary rocks at Mammoth Hot Springs in Yellowstone...University of Illinois. A form of sedimentary rock, calcium carbonate is the...
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Encyclopedia of Sediments and Sedimentary Rocks.(Book Review)
Magazine article from: Geoscience Canada; 9/1/2005; ; 700+ words
; ...Encyclopedia of Sediments and Sedimentary Rocks Edited by Gerard V. Middleton...encyclopedia devoted to sediments and sedimentary rocks, a Herculean volume that...professional of the field of sedimentary geology. The encyclopedia has...
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Contrasting Magnetic Fabrics in Sedimentary Rocks of the Accretionary Prisms of the Western Carpathians and the Eastern Rheno-Hercynian Zone
Magazine article from: Geolines; 1/1/2005; ; 700+ words
; ...the subduction zone. The rock deformation history can be...sensitive indicators of strain in rocks. Using modern instruments...can be reliably measured in rocks exhibiting the degree of AMS...The magnetic fabrics in sedimentary rocks of the Alpine thrust...Carpathians range from essentially ...
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World's Oldest Sedimentary Rocks Show How Earth May Have Avoided Becoming Giant Snowball; Carbon Dioxide May Have Acted as Planet's 'Thermostat' Since Earliest Times.
News Wire article from: Ascribe Higher Education News Service; 2/5/2007; 700+ words
; ...analysis of the world's oldest sedimentary rocks. Scientists have for...Canadian scientists, the Quebec rocks are among the oldest-known...remains of the planet's oldest rock. The only other outcropping of rocks that are about as old occur...critical issue with these rocks is that ...
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WORLD'S OLDEST SEDIMENTARY ROCKS SHOW HOW EARTH MAY HAVE AVOIDED BECOMING GIANT SNOWBALL
News Wire article from: US Fed News Service, Including US State News; 2/5/2007; 700+ words
; ...analysis of the world's oldest sedimentary rocks. Scientists have for...Canadian scientists, the Quebec rocks are among the oldest-known...remains of the planet's oldest rock. The only other outcropping of rocks that are about as old occur...critical issue with these rocks is that ...
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The Magnetic Fabric of the Vel'ká Fatra Mts. Part Two: Emplacement Mode of the Hercynian Granitic Pluton and its Relation to the Alpine Sedimentary Rocks, Based on AMS Study
Magazine article from: Geolines; 1/1/2004; ; 700+ words
; ...tools for study of rock fabrics. It has...metamorphic and covering sedimentary rocks, being partly or...Hercynian granitic rock types building a...xenoliths of wall rocks paragneisses. The...basement and Mesozoic sedimentary rocks. The measurements...susceptibility of Mesozoic ...
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Provenance of the Moine Supergroup of NW Scotland: Evidence from geochronology of detrial and inherited zircons from (meta)sedimentary rocks, granites and migmatites
Magazine article from: Journal of the Geological Society; 3/1/2003; ; 700+ words
; ...of analyses). Three rocks above the Sgurr Beag...provenance of clastic sedimentary rocks and hence assist in...highly problematic in rock sequences that have...grains obtained from rocks within the Neoproterozoic...regions for the Moine sedimentary rocks and provide the...
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Sedimentary Rocks
Book article from: World of Earth Science
...existing rocks or organic debris. The term sedimentary rock applies both...metamorphic, and sedimentary rocks produces rock fragments...consolidated sedimentary rocks. Chemical rocks are classified...composition. Rock salt (composed...
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sedimentology, sediments, and sedimentary rocks
Book article from: The Oxford Companion to the Earth
...sedimentology, sediments, and sedimentary rocks Sedimentology is the study of...conversion into rocks—sedimentary rocks. Sediments are the products...of the ocean. The analysis of sedimentary sequences and their associated...
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Sedimentary Rock
Encyclopedia entry from: The Gale Encyclopedia of Science
Sedimentary Rock Sedimentary rocks form at or near Earth ’ s surface from the weathered...decomposes rocks. Weathering of igneous, metamorphic, and sedimentary rocks produces rock fragments, or clastic sediments, and mineral-rich...
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sedimentary rock
Book article from: World Encyclopedia
sedimentary rock Type of rock formed by deposition of sediment derived from pre-existing rocks, which may have been sedimentary, igneous or metamorphic . Most sediment accumulates on...
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sedimentary geochemistry
Book article from: The Oxford Companion to the Earth
...form sedimentary rocks. These processes...in sedimentary rocks that a sedimentary geochemist can use in reconstructing rock history and diagenetic...fluid chemistry. Rocks may be analysed...Materials making up sedimentary rocks can be divided...
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