silt jackets 10.0 - to fossiliferous conc. JM-1, a hard gray ls conc, with purplish stained (manganese?) perving surfaces, hazly weth 0B to red brown, has very thin (1/2"+) kind of gypsum, no jacket. About 6' from base is a barren, conc with tough silt jacket small barren ls core EIK Butte- Trzel City (1) 7.0 - Clzy, smottled blotchy gray and dark gray with jxrosite blotches and concentration of some in lower 1 foot At top is scattered conc layer+ thick over silty cllc jackets around small lite gray ls core - barren. At base sczti. Scmilar concs but most with thin- bodded silt jackets. (2) 3.0 To first of hard ls. concs (JM-1) 49