Fig. 1 in Taphonomy of the fossil insects of the middle Eocene Kishenehn Formation

Fig. 1. Stratigraphy of the middle Eocene Kishenehn Formation from the type area at Coal Creek, Middle Fork of Flathead River region, shown in relation to the measured section at the Tunnel Creek locality—oil shale stratigraphy is representative of the other insect localities and demonstrates the heterogeneous lithologic makeup of the lower sequence of the Coal Creek Member. The thicknesses of the oil shale beds in meters is shown in parentheses. For the interval with numerous interbeds of marlstone and mudstone denoted by the bracket, the composite thickness of oil shale is listed. The oil shale within this bracket contains fossil insects.