Field Notebook: Texas 1957b
Page 299
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Transcription
172 The gastunk Lower is very dark and is apparently separated from exposures of Dingle Down on the "Flats" because of the Dingle's Lachy fossils. The Lower Gastunk (Gr.) the Hayden are gradational - slate and thin ss. giving way to shales which in an interval 20' 9/7/58 - Lennox Hills Collected for G.A. Cooper, see note p. 129