Field Notebook: SD, NE 1959
Page 135
Image from the Biodiversity Heritage Library. Contributed by Yale Peabody Museum of Natural History. | www.biodiversitylibrary.org
Transcription
Loc 30-F Cone layer at top, = Lucine cones. unless I'm off on slump. Two sperioids found in small ovoid cones 8' beneath it. 35' beneath a D nick from local cone layer. Also the pre-neborzkeensis type in float between 5 + 15 feet below top cone layer.