Chemical weathering in bedrock below the land surface often begins along joints and sheeting fractures.

Question

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Chemical weathering can begin along joints and sheeting fractures because these cracks provide avenues for water and other chemical agents to penetrate deeper into the bedrock, where they can cause chemical reactions that break down the minerals and weaken the rock. Over time, this weathering can lead to the formation of caves, sinkholes, and other landforms.

Chemical Weathering in Bedrock Below the Land Surface Often Begins