Sept. 3. 
All day on Lone Mtn. 
In morning worked on Oral which is on West side Mtn under a bluff of 
Eureka quartzite. The section is not very fossilferous. Lower beds 
contain Girvanella, The Girvanella spans a considerable interval and 
also contains Pallisana and Receptaculites 
Anomalorthis comes in below Desmorthis (200'?). The Desmorthis bad 
is 1-1 1/2' thick and occurs about 200'? below the Eureka. Exposures 
are very poor above Desmorthis but I did not see Anomalorthis above it. 
Beds above Desmorthis, and Desmorthis bed are packed with 
Ostracodes. Above Desmorthis they are very large. Bathyurid trilobites 
were also seen. 
G. Arthur Cooper - Field notes, 1964 
Transcribed and Reviewed by Digital Volunteers 
Extracted Oct-12-2015 09:35:02 
Smithsonian Institution Transcription Center, Smithsonian Institution Archives 
