Jiesen Posted May 30 Share Posted May 30 (Sorry no tape measure; didn't have one. But it's about 12 cm, top to bottom. Toyota key fob for relative scale.) Found this in the Pecan Gap Chalk (Cretaceous era, Western Interior Seaway) of south-central Texas. Thanks Link to comment Share on other sites More sharing options...
Thomas.Dodson Posted May 30 Share Posted May 30 Looks like the trace fossil Thallasinoides. They're found in the Pecan Gap (and a lot of Texas Cretaceous). A lot of things potentially make them but decapods are usually what people assume. 1 1 4 Link to comment Share on other sites More sharing options...
DPS Ammonite Posted May 30 Share Posted May 30 Not seeing any shell of a tubeworm or coral septa. Burrows in the Cretaceous are common and this may be one. 1 My goal is to leave no stone or fossil unturned. See my Arizona Paleontology Guide link The best single resource for Arizona paleontology anywhere. Link to comment Share on other sites More sharing options...
rocket Posted May 30 Share Posted May 30 (edited) Thalassinoides, they are - depending on the sediment and location - very common Thalassinoides - Wikipedia Edited May 30 by rocket Link to comment Share on other sites More sharing options...
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