8/10/87 stop (5) microvert sites strat change in abundance of verts (?) in fm. crocs & rays more abunt. upward. Fish, Frogs & salamanders more rare SITE 48 m below base of 20th bridge Comp. (BASE of BEARPAW) most non channel microsites occur 1ou in section FLAT-based TABULAR UNIT 3m to 27m multipgraded units. ripple 500 x 250 m in extent highly CATHINACEOUS Pisiid CLAMS indicate quiet water assemblage standing water. Dinosaurs were zoned different ones in MT sites than here.