Question

How is duricrust formed?​

Answer 1

Answer:

It is typically formed by the accumulation of soluble minerals deposited by mineral-bearing waters that move upward, downward, or laterally by capillary action, commonly assisted in arid settings by evaporation. ... Duricrust is often studied during missions to Mars because it may help prove the planet once had more water.

Answer 2

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It is a general term for a zone of chemical precipitation and hardening formed at or near the surface of sedimentary bodies through pedogenic and non-pedogenic processes. It is typically formed by the accumulation of soluble minerals deposited by mineral-bearing waters that move upward, downward, or laterally by capillary action, commonly assisted in arid settings by evaporation. There are different types of duricrusts, each distinguished by a dominant mineralogy. For example, ferricrete is dominated by sesquioxides of iron; alcrete is dominated by sesquioxides of aluminum; silcrete by silica; calcrete by calcium carbonate, and gypcrete by gypsum.

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