Field Notebook: Illinois, Indiana, kentucky, Missouri, Wyoming, Pennsylvania 1909
Page 49
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Transcription
Sep. 18 Saturday, Richmond Ind. 2nd of at 6 A.M. and collected a jar of the morning along the West Fork of the Whitewater up to Thistlewaite Falls. The highest beds are the Rhyz- ochitrema dentata beds. Here R. capax is very rare, below are the beds abounding in Stiptulasyna rusticum and R. capax more common. At Thistlewaite Falls level R. capax and small forms are very common. Therefore the development is from the high convex forms of R. capax to R. paradentella that I collected yesterday at the very top of the Rich- mond. The R. dentata beds are particularly rich in fossils of which 9/10 are Ostraceli podrid. Brachiopods are apt to be single valves and most of them were dead shells for they are usually worn away by Bysson. In fact at all levels the Byssons dominate the life and take possession of all prominences once dead to grow upon. The commonest shell of these beds is R. dentata. Raphiguina alternate is very rare. Gastropods are bivalves are always present but the specimens are too few to talk about.