Sept. 4 
Morning went to N end Martins Ridge. Sept 4. - two small knobs a mile S 
of N end of Martins Ridge contains a long section of Antelope Valley fm. 
Top of first knob produced 2 brachs. Top of 2nd knob produced 
Anomalorthis. On back slope of second knob and from 0-10' below the 
first quartzite Rube found a peculiar fauna which seems to have 
Valcourea plectambonitids and what looked like [[underlined]] 
Desmorthis [[/underlined]]. 
To the SW of this hill and about 0.4 mile SSE of 7427 came slopes with 
Copenhagen fm. 
Lower yellow part I would guess about 100' thick with Sowerbyites and 
other fossils. Upper slopes of a gully contained the Oxoplesia forma. In 
lower part was Leptellina, followed by lumpy Is. with Isoteloids. This was 
followed by Oxoplesia - Plectonithis - Eoplectodonta - Christiania. Near 
top came Reuschella but whole section not there. 
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 
