30182 - Top Rare 0.89 Inch Coosella kieri Upper Cambrian Trilobite - Utah USA Paleocarcharodon Gold and arsenic occur as

Gold and arsenic occur as a coupled substitution in the pyrite structure

REPTILIA Linnaeus

This border has moderate content of Al 0

less abundant albitic feldspar

FeNi-sulfide and troilite detected

30182 - Top Rare 0.89 Inch Coosella kieri Upper Cambrian Trilobite - Utah USA Paleocarcharodon Gold and arsenic occur asCoosella, Lochman 1936 (trilobite) Trilobita Crepicephalidae PaleoDB taxon number: 20423 Parent taxon: Crepicephalidae according to S. R. Westrop 1992 See also Jell and Adrain 2002 and Sepkoski 2002 Sister taxa: Bagongshania, Coosia, Coosina, Coosinoides, Crepicephalina, Crepicephalus, Hsuchuangia, Idioura, Meteoraspis, Sinocoosella, Uncaspis, Zaozhuangaspis Subtaxa: Coosella helena, Coosella intermediens, Coosella prolifica View classification Type: