They have good shale outcrops and are good for sites for farm ponds. These rocks have gently to moderately steep slopes.
Small sinkholes are common on upland terraces.
Shaly parts of the rock are impermeable. Osgood and Brassfield Formations are not good for cesspools and septic tanks. They are poor foundation material for buildings and roads. Excavating is necessary for more solid bedrock. JCPS takes no responsibility for the contents of those sites.