沿美国东部陆缘,白垩纪沉积出露于沿海平原,向东倾没于陆架水体之下(图1)。其中坎佩斯尼阶至下麦斯特利希特阶沉积于晚白垩世全球海面上升时期。由于地处沿海平原,相应的海浸、海退造成了该区上白垩统一系列超复和退复层序。Olsson 和 Nyng(1984)指出,新泽西和特拉华沿海平原中的生物相组合及有 Along the continental margin of the eastern United States, Cretaceous sediments were exposed to the coastal plains and plunged eastward into the shelf waters (Figure 1). Among them, the Campanianian to the Lower Maistrichlicht was deposited in the late Cretaceous global sea level rise. Due to its location on the coastal plain, the corresponding seafloor retreat caused a sequence of superfamily and recovery of Upper Cretaceous in this area. Olsson and Nyng (1984) pointed out that the combination of biophases in New Jersey and Delaware coastal plains