Mud cracks - nothing's simple
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Mud cracks - nothing's simple

by David Tanner, Leibniz Institute for Applied Geophysics (LIAG), Hannover, Germany

Positive imprint of dessication cracks in micritic mudstone from the Triassic Muschelkalk in Germany. The cracks are not similar polygons - most are rectangular and all different sizes. Width of sample - 9cm.