Field Notebook: SD, NE 1959
Page 118
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Transcription
1570 62 Comparative section in next appreciable gulley to E begins on cone layer base of unit (3), traced over. OLD UNIT NEW UNIT FEET (3) (A) 6.6 fairly To top persistent cone unit reddish worth, locally fossilif, some scrt cones between. cones vary in size up to 3't in bedding clown. Matrix is clayey sand. (4) (B) 20.5 Clayey sand, fq v.fq, graywackys, some highly glaucounitic louses + layers, cone 5.5 from base locally) that weather rusty brn (another about 15.0t). loose big Idouezzers scrt in lower 5.0 at least. At top is layers scattered rb worth cones. Becomes clayey th upper 3b4#; whole is thoroughly mixed except for discontinuous layers with glauc. Local cone zone comes in here to W. C 5.8 Clayey sand, at top discontinuous layer cone-in-cone cones marking local bentonitic salty clay which seems to have become locally thoroughly mixed thru, "worm-working" + thus dissipated. (Note glauc & brn, A+B ended #) (6) (D) 6.0 As below becoming somewhat more clayey upward. At top persisted layer cones that are apparently brown, weather rusty brn. (7) (E) 21.4 Lower 5't a clayey sand becoming less sandy upward, upper 15.0 predominantly a silty clay-clayey silt with sandy streaks + patches, some sandy layers appear as cross-beds. Fossils begin loose in clayey silt or in scrt. cones as much as 6.0 from top. In upper 1.0 persistent cone layer in a below it avoid highly fos. cones,