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The Newark Supergroup consists largely of poorly sorted nonmarine sediments; typical rocks are breccia, conglomerate, arkose sandstone, siltstone, and shale. [3] [4] Most of the strata are red beds that feature ripple marks, mud cracks, and even rain drop prints; dinosaur footprints are common, though actual body fossils are very rare. [4]
Terrestrial Rift Valleys - largely subaerial valleys that are rifts in continental crust commonly with bimodal volcanism; Proto-oceanic rift troughs - incipient ocean basins where new oceanic crust is forming, flanked on either side by young rifted continental margins; Typical rift formation in cross-section: Terrestrial rift valleys. Rio ...
Cratons of South America and Africa during the Triassic Period when the two continents were joined as part of the Pangea supercontinent. A craton (/ ˈ k r eɪ t ɒ n / KRAYT-on, / ˈ k r æ t ɒ n / KRAT-on, or / ˈ k r eɪ t ən / KRAY-tən; [1] [2] [3] from Ancient Greek: κράτος kratos "strength") is an old and stable part of the continental lithosphere, which consists of Earth's two ...
Examples of such basin classifications include intracratonic, rift, passive margin, strike-slip, forearc, backarc-marginal sea, fold and thrust belt, and foreland basins. [1] Sedimentary basin analysis is largely conducted by two types of geologists who have slightly different goals and approaches.
By definition, a basin is any area that collects sediments. These "aborted rifts" (rifts that are tectonically inactive and no longer collecting sediments) extend from North Carolina to Newfoundland. Along certain basins, rifting was not partial. Where full rifting occurred, the Atlantic Ocean was created.
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The Midcontinent Rift System (MRS) or Keweenawan Rift is a 2,000 km (1,200 mi) long geological rift in the center of the North American continent and south-central part of the North American plate. It formed when the continent's core, the North American craton , began to split apart during the Mesoproterozoic era of the Precambrian , about 1.1 ...
Second-cycle platform and basin sedimentation occurred from 1.88 to 1.87 Ga and is associated with a new rifting episode or development of a fore-trough basin. This period is characterized by the intrusion of mafic-ultramafic sills, meimechite and carbonatite deposition, and MORB-like mafic volcanism corresponding to the formation of a ...