Field Notebook: SD 1964
Page 7
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Transcription
Check with JR Note - except where interbedding noted or beds called "banded", questionable how much JR calls silty shale is actually a shale - i.e. in contrast to silty clay, where doubtful original is quoted. Doubt consult "ironstone" 6 5.2 As in (2), with concentration of concretions as follows - 2.3 extensive thin layer dk qr. concs with light "bumpy" rind. 3.3 sparsely scat, layer of similar concs. 5.2 loczl, scat, small punky, sudy concs some with cores. 7 8.0 Chiefly interbedded silt and silty-shale with extensive conc. zone at top. Concs in broad sand jackets that may constitute layer, conccs are "ironstone" [question this]. Beds below have gerosite layers .2 to .5 thick at 2.6, 4.1 and 7.2. 8 5.2 "Silty shale", layer concs 1.1 thick at top, Concs "ironstone" with convoluted gray ss jackets. 9 11,4 "Silty shale", dk gray weathous ten-gray some limonitic streaks. At top 9" limonitic zone with pocket loose fossils (A-4650) 10 9.5 "Silty shale", with 1.0 conc. layer, "ironstone" with with gray ss jackets, at top. 11 10.0 Clayey silt, lay small (3" thick) "ironstone" concs at top. 12 4.8 "Silt", with zone large "ironstone" conccs up to 2.0 dm with gray to tan ss jackets. 13 6.9 Sand, fine grained, brown wth., minor shaley beds, small scattered "ironstone" concs at 1.9 and 5.5. At top a layer "ironstone" conccs with red-yell-barn.