7/11/84 8460 (cont.) LACK of apparent current feat, or sorting of lake sed. Noted in section as they would have lain well below wave base in a relatively small lake. Streams would also have been small, mostly directed away from upturned margin of crater rim. - Paleozoic peneplain into which crater is blasted was uplifted in Plio or Pleist. - Platey limey sh is paleozoic not lake beds 8461 By the Roberton reports are red ss flat platey beds remnants on breccia indicating former presence of lake beds over breccia