clay zone, not well exposed anywhere in vicinity. Shallow trench in weathered outcrop shows following section from base sandstone down 1.1 - Silty shale, iron stained! 1.6 Hard ledge, claystone - like porcellanite? Sample 18 1.7 Dark gray plastic clay, Fe stained layers of silt, Brownish clay in lower .3 .3 White very plastic clay, bentonite-like Sample 19 2.5 Alternating dark gray, mottled mottled plastic clay and Fe stained siltstone. (weathered clay v siltstone) .3 Siltstone bed, laminated top & base Fe stained .5 Dark mottled clay Sample 20, compost of interval meltinated,