Trace fossil · Dwelling

Diplocraterion

A vertical U-shaped burrow with a spreite (a web of curved laminae) between the two limbs. Protrusive spreite (between the tubes) suggests erosion, with the animal burrowing deeper; retrusive spreite (below the tubes) records the animal adjusting up and down as sediment was eroded and deposited.

Behavior: Dwelling
Likely maker: Crustaceans (textbook); organisms maintaining a set depth in the sediment.
Age range: Not stated in the sources used here; cited studies include Cambrian tidal deposits.
Setting: Tidal settings with shifting erosion and deposition.

**Diplocraterion, Potsdam Sandstone.** Michael C. Rygel via Wikimedia Commons, CC BY-SA 3.0. Source

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All trace fossils Ichnofacies

Sources

Rygel & Quinton, Sedimentary Geology 9.6: Trace Fossils · Wikipedia: Diplocraterion