This causes an escarpment for a long ways along the foothills, most of the way from Little Thompson to Big Thompson and probably further, the upper Niobrara being somewhat resistant, the overlying Pierre being eroded away. ((Drawing in field book)).
This causes an escarpment for a long ways along the foothills, most of the way from Little Thompson
Little Thompson Creek, Colorado to Big Thompson Big Thompson Creek , Colorado and probably further, the upper Niobrara being somewhat resistant, the overlying Pierre being eroded away. ((Drawing in field book)).
