Results: 1 - 2 of 2
Aug 31, 1983
Open File Report
… sedimentological framework of Lower Cretaceous coal-bearing rocks in … sedimentological framework of Lower Cretaceous coal-bearing rocks …
Jun 30, 1980
Open File Report
… the Bad Heart Sandstone of Late Cretaceous age. The deposit crops … marine shales of the upper and lower Smoky Group. The deposit has …