Field Notebook: SD, NE 1959
Page 65
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Transcription
but - 1. No sign of lignite or lignitic shale the Denson & others report at contact in this area. 2. Is Helynuites sand an unconsolidated phase of the Colgate? Restudy this area. - possible composite for Hump Creek area. Restudied. - Colgate is massive fluted sand