Sedimentary Structures


Many organisms produce a variety of distinct sedimentary structures in loose, unconsolidated sediment such as mounds, cross lamination, divots, layer truncations, and flame structures. These structures are the result of surface excavation and intrusion into the sediment. Layering or lamination may be produced in structureless sediment as the result of excavating a burrow. Conversely, sediment layers may be cut, deformed, or homogenized by an organism moving through the subsurface. These biogenic structures are often indistinguishable from abiotically produced sedimentary structures.

Organisms that produce notable sedimentary structures

Ocellated Skink
Arizona Desert Scorpion
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