Above the transgressive sequence are Late Cretaceous shales with tight, micritic carbonate, marking the top of the Mesozoic.
Recent to Oligocene succession consists of; (1) lower zone of fine to coarse sands with some clay partings and dolomite beds; (2) middle zone of gray-green, red-brown shales and clays; and (3) an upper zone of largely unconsolidated, slightly feldspathic sands.