Interpretations from resistivity and lithologic logs in selected wells in the Williston basin

These data represent the interpretations from borehole electric (resistivity) logs from oil and
gas wells and lithologic logs from nearby water wells. These interpretations were used to
build the hydrogeologic framework in the Williston structural basin. The resistivity logs were
used to identify the hydrogeologic units (fig. 3A of SIR 2014-5047) and to quantify the vertical
detailed lithology (thickness of sand, coal, gravel, silt, and shale) in the oil and gas exploration
boreholes.