shell creek shale 예문

예문

1. Eicher redefined these beds in 1960 as the Shell Creek Shale, separating them from the Mowry Shale.
2. This effectively put the Thermopolis Shale below the Muddy Sandstone Formation . } } In 1998, Porter et al . identified the Shell Creek Shale as the upper member of the Thermopolis Shale, a position with which Lash agreed in 2011.