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单词 arkose
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Arkoseis a sand or sandstone with considerable feldspar content, derived from weathering and erosion of a (usually nearby) granitic rock outcrop.
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Arkoseis often associated with conglomerate deposits sourced from granitic terrain and is often found above unconformities in the immediate vicinity of granite terrains.
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Arkosesandstones are more than 25 percent feldspar.
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Its cliffs, made ofarkosesandstone, are a very prominent landscape feature visible for miles.
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The sand often contains kaolinized feldspar, making it anarkose.
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Arkosic sand is sand that is similarly rich in feldspar, and thus the potential precursor ofarkose.
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The sand grains making up anarkosemay range from fine to very coarse, but tends toward the coarser end of the scale.
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It was described as red shale and sandstone with beds of micaceous sandstone,arkose, and conglomerate.
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Grus sand, when cemented into a sandstone, will form anarkose.
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Fossils are rare inarkose, due to the depositional processes that form it, although bedding is frequently visible.
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These types of sediments are typically formed during orogenic deformation; for example, thearkosedetrital sedimentary rock found in fault troughs.
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It consists of turbiditic sandstone (subgraywacke andarkose) interbedded with secondary siltstone, mudstone, tuff, volcaniclastic sedimentary rock, agglomerate, and conglomerate, which have all been metamorphosed to prehnitepumpellyite to blueschist facies.
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These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.

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更新时间:2025/2/26 4:38:09