See Arnsbergian age rocks here
Eosyngastrioceras hesperium (Miller and Furnish) 1940
Glaphyrites
millardensis Titus 2000
Top Row left and ?right: Glaphyrites
millardensis Titus 2000, both 21mm dia.
Top Row middle (2): Eosyngastrioceras
hesperium (Miller and Furnish) 1940, 28mm - 25mm dia.
Bottom Left: ?Stenoglaphyrites sp.
(or crushed Eosyngastrioceras)
Bottom Center: Stroboceras
(Epistroboceras) texanum (Miller and Youngquist) 1948, Latex cast
Bottom Right: a small latex cast of
Eumorphoceras girtyi Elias 1956
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