Proetus Trilobite From Iowa
Posted 04 August 2012 - 06:51 PM
Little Cedar Formation
Johnson County, Iowa
Posted 04 August 2012 - 07:46 PM
W.J. Hickerson, 1992
Trilobites from the late Givetian Solon Member, Little Cedar formation of eastern Iowa and northwestern Illinois
Iowa Dept. of Natural Resources, Guidebook No. 16: J. Day and B. J. Bunker (editors)
The stratigraphy, paleontology, depositional and diagenetic history of the Middle-Upper
Devonian Cedar Valley Group of central and eastern Iowa, pp. 123-139.
Not sure if a pdf is available but the paper should be easy to discover.
Posted 04 August 2012 - 08:33 PM
Posted 05 August 2012 - 08:57 AM
I have this piece of a proetid from Johnson county. The bump on the top of the head is a drop of water, I was trying to bring out some of the detail by wetting it. Somewhere I have a paper by Hickerson where he identifies several species by the pattern of the dark furrows on the head. I think I misplaced the paper.
Posted 05 August 2012 - 10:27 AM
Posted 06 August 2012 - 08:25 AM
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