GK
WORLD GEOGRAPHY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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unweathered bedrock
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weathered parent material
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plant litter at various levels of decomposition
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None of the above
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Detailed explanation-1: -R horizons denote the layer of partially weathered or unweathered bedrock at the base of the soil profile. Unlike the above layers, R horizons largely comprise continuous masses (as opposed to boulders) of hard rock that cannot be excavated by hand.
Detailed explanation-2: -The R horizon is basically the deepest soil horizon in the soil profile. Unlike the horizon above, this horizon does not comprise rocks or boulders, but instead is made of continuous mass of bedrock. It is very difficult to dig through this layer.
Detailed explanation-3: -C-Horizon – A layer of weathered bedrock that lies below the sub-soil layer – Made up of fragments of stones and rock. R-Horizon – Unweathered parent material – Compacted and cemented layer.