Field Notebook: SD, ND 1962
Page 111
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Transcription
Section B - Offset about 75' to E No. 5 conc. layer top of unit (5) sec A, measuring up. (1) 10.5 Interbedded shale, dk grey to grey silty & light gray siltstone. Silt predominates in lower 3+ feet which are dark rusty brown. Siliceous silt in pads, layers & wavy blebs, but laminations less well defined. Local 6-mt mess about 6.5± from base. (2) 16.5 concave, crep interval uncertain of bed rocks (3) 25.0 Interbedded to interlam., grey & dk grey silty clay & light gray silt, clay layers thicker. Upper 5' more mixed of clayey silt with yzvosite blebs. Few small sczh. rb wartz concs, At top layer is rb wartz concs. (4) 34.0 To base big conc. layer (1st) gets progressively more silty upward becoming gray clayey silt with yzvosite blebs in upper 10'± At 15.5 from base zrc row small is concs. 54.