[[image: pencil sketch showing layer profile of soils]] 
Swan Peak 15' 
100' { 80' Upper Pogonip dolomitized 
{ Hesperonomia 
{ Chert 20’ 
[[written sideways]] According to Deiss 
840' [[/sideways]] 
{ Hesperonomia 
{ Diparelasma about middle 
{ "Ophileta" 
50' Apheoorthis & Tetralobala 
Dolomite St. Charles } 
Thin bedded limestone Franconia fossils } 
Quartzite Worm Creek } 
G. Arthur Cooper - Field Notes and Maps, 1939 
Transcribed and Reviewed by Digital Volunteers 
Extracted Qct-09-2015 11:35:33 
Smithsonian Institution Transcription Center, Smithsonian Institution Archives 
