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arkosic sandstone

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arkosic sandstone [är′kōs·ik ′san‚stōn]
(petrology)
A sandstone in which much feldspar is present, ranging from unassorted products of granular disintegration of granite to partly sorted river-laid or even marine deposits.


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King (1990) described the stone as a medium- to thick-bedded, red, arkosic sandstone having thin to medium interbeds of siltstone, mudstone, intraformational breccia, red conglomerate and green sandstone.
The rock units are the same Triassic black shales and arkosic sandstone, overlain by shale fragment breccias and tertiary tuffs, and there is extensive silification and argillic alteration.
 
 
 
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