7/23/81 515 POTOMAC - ACCOCEEK CR DIVIDE S of Stafford CTH on I95 SAND light grey Karinite X-bedded with RARE CLAY INTERBEDS X bedding & much comminuted plant matter on bedding planes tops of hills capped with 30' P110 - M10 gravels. cut & fill str's into POTOMAC Group. some interbedded greenish clays 815 b - Pollen Sample clay at _____ barometer SS bed outcrops in saddle at least 30-40' thick coarsening to base underlain by sulphide rich siltst & clays & SS