Definition: Redclay: The earth's reddest layer, consisting of fine-grained sandstone. It's found on ancient rocks and can vary in texture, color, and age. Redclay describes the reddish-brown appearance of earth layers due to minerals like calcite (sandy) or quartz (crystalline). Detailed definition: Redclays are fine-grained sedimentary rock that is predominantly composed of sandstone; they can exhibit various colors from red to orange, depending on their source. Redclays provide insights into the geologic history and environmental conditions on Earth.
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