Field Notebook: USA 1995c
Page 73
Image from the Biodiversity Heritage Library. Contributed by Yale Peabody Museum of Natural History. | www.biodiversitylibrary.org
Transcription
5/17/95 [24B] Upper part of Staleston about 5E7 miles Scale Mound on railroad cut. Photo 1-B/W on RR tracks 18+ W photo from top (edge of road) looking down on RR cut Silty shale, lt grayish gray in 2 to 3" beds and regularly interbedded with Siltstone, very shely in 2 to 4" beds. - There are at least 22 cycles of these two lithologies regularly repeated through about 14' of exposure above debus that covers base of cut, ie about 8+9' not seen at base of cut above railway level. Some surfaces have fragments (1/4") of organic material (something like a flattened grass"), worn burrows in Siltstone faces. Dribble frogs (? Isotites?) Slightly limy (lingir) bed about 4' down from top of exposure with gray afference on one surface (? top surface) 1/2" ripple crests about 2 wide in some places. Binds of pyrite nodules in Some beds - Question (?) Could the upper part of this railroad cut be as high as NW Illinois faces of H. Aitchison ?? Could the 22 cycles (or thereabouts) correlate with the cyclicicy in the Cincinnati area