Hole 31 Surf. Elev. Depth 78'7" From To Th. 0 21'5" 21'5" White medium, locally fine grained micaceous sandstone, minor carbonaceous streaks and partings, gray in lower 7' Clarion 21'5" 22'1 8" Coal A coal 22'1 25'5 3'4" Black to dark gray clay shale, coaly in upper part, silty in lower. Clarion or Homewood shales? 25'5" 26'6" 1'1" Gray siltstone and sandstone. 26'6" 31'8" 5'2" Black shale, locally finely silty + sandy, plant fragments. 31'8" 33'9" 2'1" Hard gray silty shale 33'9" 46'9" 13' Gray sandstone, medium to fine grained, micac- eous. Banded, x lam- nated, with coaly seams and partings. (1" coal from 40'10" to 40'11") Homewood 46'9" 48'8" 1'11" Sandy shale, shaley sand- stone and fine grained coaly sandstone, gray to black. ? ? shale 48'8" 59'6" 10'10" Gray to black shale, silty in upper 9', some coaly clay layers. Monson 59'6" 61'10" 2'4" Coaly shale, coal, and gray clay with plant fragments, and coal. lower coal horizon 61'10" 67'4" 5'6" Hard clay as follows:- Coal from 61 to 61'7". 2" dark gray flinty top block' Clay 9" gray flinty block