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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
- IIT JAM
- Geology (GG)
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in which of following conditions ARKOSIC sandstone might have formed
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Rahul kumar Best Answer
Answer: A and D Arkosic sandstone contains major fraction of feldspars as framework grains. Since feldspar is relatively unstable than major framework mineral of sandstone (i.e. quartz); presence of feldspar indicates very less weathering conditions. Quick weathering without much transportation will help in preservation of feldspars and hence will result into arkosic sandstone.
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sir its msq choose another option apart from D
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Sajan sarthak
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BOTH TECTONICS AND CLIMATE PLAYS IMPORTANT ROLE IN STORING THE FELDSPAR IN ARKOSE.
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Saurabh 1![best-answer]()
Arkose is definitely a texturally immature sandstone rock as it consist of excess feldspar. Feldspar (as per goldich weathering cycle or series) is not much resistant to weathering or it is weathered prominently in long transportation and exposure. So long transportation is majorly avoided in this case and hence quick burial is dominant. Also arid or dry condition are required to prevent chemical Weathering which may leads to the formation of clay minerals.