Abstract Name: Northeastern North American continental margin carbonate shelf Author: L. F. Jansa Location: From 42° 30' to 46° north latitude and 57° to 68° west longitude, shelf off eastern Canada and northeastern United States Geologic time interval: Tithonian–Aptian Tectonic-sedimentary setting: Outer shelf; tectonically, eustatically, and climatically controlled, localized continuation of Jurassic carbonate megaplatform deposition Basin type: Pericratonic (extensional), developed at the continental margin edge Paleoclimate: Generally humid, subtropical Platform type: Complex; intraplatform variety of environmental settings from shelf lagoon to an open shelf and/or rimmed shelf with steep escarpment in front Platform geometry: Early Cretaceous segment of platform is a series of discontinuous carbonate platforms and banks up to 472 m thick and 50 km wide. It constitutes an integral part of a 1100-km-long carbonate platform belt representing the northern segment of a 6000-km-long or more Mesozoic carbonate megaplatform Facies and fossils: Predominantly mudstone to skeletal wackestone, minor oolitic and skeletal grainstone, rare sponge bioherms; occasionally intercalated shale and terrigenous siltstone; pelagic and benthic foraminifers, molluscs, corals, sponges, and calpionellids Systems tracts: Not established Stacking pattern: Sigmoid; complex, sigmoid oblique; aggradational as well as retrogradational; different patterns synchronously developed at different places on the same platform