Field Notebook: SD, ND 1962
Page 87
Image from the Biodiversity Heritage Library. Contributed by Yale Peabody Museum of Natural History. | www.biodiversitylibrary.org
Transcription
Locality 98 Rattlesnake Butte. Section - Notice - measured down from top. (8) 23.0-? A952 Butte cap, a fq to vfg sandstone of "Colgate" type, silicified. Crossbedded to x1em, good current bedding + ripples, intersecting channels, loczl indurated clay pellet cgl, and salty clay lenses, fossil wood and some fairly well preserved leaves. A highly variable cap in its sed features but all indicate current. uncont. (7) 8.0 Clay, silty to sandy. In upper 5.0, blocky, grey, weathers light gray with ob strm and chips near top. I'ze stdt plznt fragz throught. (Bszl ll:ot is brn gray finely silty clay shale with plant frags, grades to lq shale below and into about 1.5 of gray, vfg sand, x1zm above. (6) 5.0 Clay, brownish gray, plant frags & lq streaks and pockets with prominent ledgey hard liquidtic red-gray weath shale at top and a tough dk gray clay of bosal 1.0 to 1.5 with lq streaks. It purplish cast. (5) 3.8 Clay, tough, gray, plant frags, silty, with a few layers & laminae silty vfg sand. At base becomes hard massive silty clay + grades to unit below. 42