Section 3. Measuring up from highest sidelite conc. layer in Elk Butte. Concs are 1'± in diam, hard, weath mzxroon zve light brownish gray inside. Conc in piece (1) 15.5 Shale, gray, silty, weathers to light gray flakes. About 3' above base is dark gray, earthy-weathering # popcorn (prob. bentonite) up to about 11' above base. On fresh surface it is good shale throught. (2) 13.3 Shale, gray, silty, similar to below(1) but with thin interbeds and lzm inch of silt. This in lower 3.0 feet±. Above silty zone is earthy dark gray silty clay shale chiefly blocky, which grades into Fe stained, silty-gray shale about 5.5 from top. Bp taken at thin jarosite layer (3) 11.0 Clay, locally shaly but mostly blocky, mixed clay and silt, Fe brown + rusty stain on fresh, weathers to brownish gray slipen At 5.5 weak jarosite layer, a few scetti concs. 4