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Showing results for tags 'eagle ford ammonite'.
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I fossil hunted the lower limestone flag member of middle Eagle Ford Formation in Travis County, Texas USA yesterday. I came up with three nice finds. The first is a 130 mm x 75 mm section of a large ~2' diameter ammonite. Two pics included but it is difficult to make out. I think it is an EUOMPHALOCERAS genus, based on GEOLOGICAL SURVEY PROFESSIONAL PAPER 274-C 1955. Any different opinions? The second find is a 15 mm wide Ptychodus Occidentalis per Shawn Hamm's recent email help for me on a couple of 10 mm wide Ptychodus out of 8 total located ~1/2 mile NE from the subject area. Check out last two ptychodus pics in question. He says ridge bifurcation doesn't always occur on P. Occidentalis. Sometimes the ridges extend to the marginal area and curve anteriorly without bifurcation on one or both sides. The third is a shark vertebrate?? The largest I have seen in Travis County at 33 mm diameter. All three were present in the same 20' x 20' area in a 2" thick layer of limey mud rock coated top & bottom with thinner layers of oyster shell hash. Wow! Lots of fun!
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