The deformation belts are formed by Late Carboniferous rocks, mainly mylonitization volcanic rocks and volcanic clastic sedimentary rocks. 变形带由下石炭统干墩组组成,为一套 化火山 、火山碎屑沉积 。 Interlayer oxidized zone and argillite-sisandstone-argillite sequence occur in redclastic rockformation ...
They were mainly formed by turbidity currents that originated on intrabasinal uplifts composed of tholeiitic basalts in the Permian. In the Triassic, the currents originated on uplifts consisting of ocean-island alkali basalts along with Permian and Lower Triassic cherty and cherty–clayey rocks. ...
Noun1.sedimentary rock- rock formed from consolidated clay sediments argillite- a sedimentary rock differing from shale in being bound by silica and from slate in having no slate cleavages rock,stone- material consisting of the aggregate of minerals like those making up the Earth's crust; "that...
…and sedimentary rock: (1) terrigenous clastic sedimentary rocks and (2) allochemical and orthochemical sedimentary rocks.Read More composition and properties In sedimentary rock: Classification systems …rocks are recognized: (1) terrigenous clastic sedimentary rocks, (2) carbonates (limestone and dol...
1.composed of fragments or particles of older rocks or previously existing solid matter; fragmental. 2.pertaining to an anatomical model made up of detachable pieces. 3.Biol.breaking up into fragments or separate portions; dividing into parts. ...
Example Sentences Lastly, the name clastic has been given, because the rocks so called are formed by the breaking up of pre-existing rocks. FromProject Gutenberg Clastic, klas′tik, adj. breaking into fragments, fragmental. FromProject Gutenberg...
Coarse‐grained rocks. Sedimentary brecciacontains an abundance of coarse, angular fragments of gravel that were deposited very near the source area. Aconglomerateis formed from coarse‐grained, rounded pieces of gravel.Sandstoneis a medium‐grained rock that contains rock particles (mostly quartz) abo...
Charac- teristics of carbonate cementation in clastic rocks from the Chang 6 sandbody of Yanchang Formation, southern Ordos Basin[J]. Science China: Earth Sciences,2012,42 ( 11 ) : 1681-1689.Characteristics of carbonate cementation in clastic rocks from the Chang 6 sandbody of Yanchang ...
(1992) and reviewed by Anderson (1995), reveal the MRS in Iowa (Fig. 1) to be characterized by a central horst (the Iowa Horst) dominated by mafic volcanic rocks, thrust over its contacts with the thick sequences of younger Keweenawan Supergroup clastic rocks that fill flanking basins (...
Twitter Google Share on Facebook nonclastic [¦nän′kla‚stik] (geology) Of the texture of a sediment or sedimentary rock, formed chemically or organically and showing no evidence of a derivation from preexisting rock or mechanical deposition. Also known as nonmechanical. ...