sentences:  Horizontal to low-angle cross-bedded, fine-grained sandstone with intercalated bivalve pavements indicates tidal currents that operated in small flood and ebb tidal deltas and along the coast.Stacked successions of trough cross-bedded, medium- to coarse-grained sandstone of the upper part of the "Indotrigonia africana" Member are interpreted as tidal channel and sand bar deposits.At some places in the surroundings of Tendaguru Hill, these sediments interfinger with oolitic limestone layers that represent high-energy ooid shoals.