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See all on WikipediaThe greywacke zone is a band of Paleozoic metamorphosed sedimentary rocks that forms an east-west band through the Austrian Alps. The greywacke zone crops out between the Mesozoic rocks of the Northern Calcareous Alps and the Austroalpine and Penninic basement rocks of the Central … See more
The lithologies of the greywacke zone are:
• Paleozoic turbidites (among them greywackes) and limestones of Ordovician to Devonian age; and
• felsic and mafic volcanic rocks of Ordovician See more
The rocks were formed at a passive margin of the Paleo-Tethys Ocean, when the Austroalpine terrain was part of the micro-continent Avalonia. Together with the other … See more
Wikipedia text under CC-BY-SA license The origin of greywacke was unknown until turbidity currents and turbidites were understood, since, according to the normal laws of sedimentation, gravel, sand and mud should not be laid down together. Geologists now attribute its formation to submarine avalanches or strong turbidity currents. These actions churn sediment and cause mixed-sediment slurries, in which the resulting deposits may exhibit a variety of sedimentary features. Supporting the turbidity origin theory is the fact th…
Wikipedia · Text under CC-BY-SA license- Estimated Reading Time: 4 mins
WEBThe Wellington Region of New Zealand has a foundation of Torlesse Greywacke rocks, that make up the Tararua and Rimutaka Ranges, that go from Wellington in the south to the …
WEBApr 23, 2023 · Greywacke is thought to be formed from muds and sands that flow down the continental slope and out onto the deep sea floor where they accumulate great thicknesses over a long period of time. These …
Greywacke | Natural Atlas
WEBGreywacke or graywacke (German grauwacke, signifying a grey, earthy rock) is a variety of sandstone generally characterized by its hardness, dark color, and poorly sorted angular …
WEBGreywacke [ 1] is a type of sandstone. It is hard, and dark in color. It has different sized grains of quartz, feldspar, and small rock fragments set in a compact, fine clay matrix. It …
WEBSep 14, 2021 · Examples of greywacke textures, identification, and description in thin section and under a polarizing microscope
WEBGreywacke is a gray to green-gray rock consisting mainly of sandstone with a high proportion of feldspar and matrix. The term "Grauwacke" originates from the miners' …
WEBGraywacke is a variety of impure sandstones and is generally characterized by its hardness, dark color, and poorly sorted angular grains of quartz, feldspar, and small rock of lithic …
WEBFeb 28, 2015 · Graywacke is deposited in deep ocean water near volcanic mountain ranges, where underwater landslides and density currents called turbidites quickly transport sediment short distances into a subduction …
Sedimentary rock - Wackes, Stratification, Deposition
WEBJul 25, 2024 · Wacke, or graywacke, is the name applied to generally dark-coloured, very strongly bonded sandstones that consist of a heterogeneous mixture of rock fragments, feldspar, and quartz of sand size, together …
Geology of the Waikato-King Country Region - Wikipedia
WEBThe Waikato and King Country regions of New Zealand are built upon a basement of greywacke rocks, which form many of the hills. Much of the land to the west of the …
Greywacke - WikiMili, The Best Wikipedia Reader
WEBDec 26, 2023 · Greywacke or graywacke (German grauwacke, signifying a grey, earthy rock) is a variety of sandstone generally characterized by its hardness, dark color, and …
WEBEarly ideas were that greywackes were shallow water deposits, laid down in near-shore areas by streams. Later, theory of diastrophism led to belief that they were associated …
Greywacke | SpringerLink
WEBNov 11, 2019 · Greywacke is also known as mixed sandstone or grey sandstone. It includes a variety of sandstones characterised by their hardness and dark colour. …
About: Greywacke zone - DBpedia Association
WEBThe greywacke zone is a band of Paleozoic metamorphosed sedimentary rocks that forms an east-west band through the Austrian Alps. The greywacke zone crops out …
Category:Greywacke zone - Wikipedia
WEBGeology of Austria.
Geologic Formations - U.S. National Park Service
WEBNov 10, 2021 · Bedrock underlying the Sitka area is comprised of greywacke with interbedded argillite that was formed in the Jurassic to Cretaceous periods (180-140 …
Greywacke - chemeurope.com
WEBGreywacke (German grauwacke, signifying a grey, earthy rock) is a variety of sandstone generally characterized by its hardness, dark color, and poorly-sorted, angular grains of …
Geology of the Auckland Region - Wikipedia
WEBAs with most of New Zealand, the basement rocks of the Auckland Region are composed of greywacke (indurated sandstone, siltstone and mudstone). Murihiku Terrane Greywacke …
硬砂岩 - Wikipedia
WEB硬砂岩 （こうさがん）またはグレーワッケ （英: greywacke 、graywacke、独: Grauwacke ）は砂岩の一種である。 一般に「硬く、暗色で、 分級 に乏しい角ばった 石英 ・ 長 …
greywacke: meaning, translation - WordSense
WEBThe greywacke zone is a band of Paleozoic metamorphosed sedimentary rocks that forms an east-west band through the Austrian Alps. Greywacke zone - Wikipedia. The …
Talk:Greywacke zone - Wikipedia
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