[[left margin, circled]] 10 [[/left margin]] 
May 20 
Iowa farm (Roll 2 color F7, F8 just N of Mason City, W side US65 
[[insertion]] 335b [[/insertion]] 6632 - Abandoned Qy on N side US20 1/2 
mile E of intersection with Iowa 150, E edge of Independence, la 
Small quarry showing about 3-4 feet of Independents zone and about 
10' of profundum zone. 
Large Atrypa abundant, Gypidula very rare. 
Small channel of probable Independence shale. = loc 6633=335d 
[[left margin]] 335c-6632a - Same as 6632 but from the profundum zone 
- base of this zone with many Cystiphyllum [[/left margin]] 
[[insertion]] 335e [[/insertion]] 6634 - large quarry exactly 1 mile on U.S. 
20 east of its junction with la 1 50, on south side of road. 
Section has Davenport, and Solon with a thin independents zone and 
possibly 10' of profundum zone. 
Called on Mr Levorson in morning. 
6635 coal from sink in 6634. 
G. Arthur Cooper - Field notes, 1 966 
Transcribed and Reviewed by Digital Volunteers 
Extracted Nov-02-2015 11:09:05 
Smithsonian Institution Transcription Center, Smithsonian Institution Archives 
