A passive margin is the transition between oceanic and continental lithosphere that is not an active plate margin. A passive margin forms by sedimentation...
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outermost zone of the continental margin. There are two types of continental margins: active and passive margins. Active margins are typically associated with...
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Syrian Arc (section Passive margin formation)
by extensional tectonics, was associated with the development of a passive margin in northern Africa as the Neotethys Ocean was formed. The second, dominated...
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form a passive margin. In this case the sedimentary rocks of the rift basin phase are overlain by those rocks deposited during the passive margin phase...
48 KB (4,634 words) - 05:32, 23 May 2025
Permian Basin (North America) (section Lower Paleozoic passive margin phase (late Precambrian–Mississippian, 850–310 mya))
marine sedimentation onto the ancestral Tobosa Basin characterized the passive margin, shallow marine environment. The Tobosa Basin also contains basement...
59 KB (7,014 words) - 07:23, 25 May 2025
straits. A passive margin developed on the edges of these new seas in the Death Valley region. Carbonate banks formed on this part of the two margins only to...
57 KB (5,546 words) - 12:48, 11 March 2025
Geology of North America (section Passive Margin)
Atlantic Coast turned from an active margin into a passive one. Terranes were no longer accreted onto the margin; instead, sediment eroded off the Appalachians...
34 KB (3,380 words) - 01:53, 25 May 2025
Extensional tectonics (section Passive margins)
antiformal closures and these are known as metamorphic core complexes. Passive margins above a weak layer develop a specific set of extensional structures...
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Volcanic passive margins (VPM) and non-volcanic passive margins are the two forms of transitional crust that lie beneath passive continental margins that...
10 KB (1,048 words) - 12:53, 30 December 2023
Baltica (section Northern margin)
Mesoproterozoic sediments. The margin became a passive margin facing the Ural Ocean in the Cambrian–Ordovician. The eastern margin stretches south through the...
23 KB (2,459 words) - 09:53, 24 May 2025
Non-volcanic passive margins (NVPM) constitute one end member of the transitional crustal types that lie beneath passive continental margins; the other...
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Overlying the arc-related sequence is a Late Cambrian to Early Devonian passive margin succession of clastic and carbonate sedimentary rocks. The Tākaka Terrane...
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of the deep ocean basin proper, but the flooded margins of the continent. Passive continental margins such as most of the Atlantic coasts have wide and...
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as a passive margin. Some passive margins have up to 10 km of sedimentary and volcanic rocks covering the continental crust. As a passive margin is pulled...
67 KB (8,304 words) - 23:31, 22 May 2025
Mountain formation (section Uplifted passive margins)
no widely accepted geophysical model that explains elevated passive continental margins such as the Scandinavian Mountains, eastern Greenland, the Brazilian...
18 KB (1,613 words) - 19:23, 5 January 2025
where passive margins form. The edges of these continents may rift. At this point, seafloor spreading becomes the driving force. Passive margins are therefore...
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Tectonic subsidence (section Passive margins)
subsidence on a large scale in a variety of environments, including passive margins, aulacogens, fore-arc basins, foreland basins, intercontinental basins...
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convergent margin. Along the then western margin, Late Neoproterozoic to early Cambrian rifting was followed by the development of a passive margin. To the...
88 KB (9,283 words) - 17:39, 23 May 2025
comprising the continental cratons. The margins of geologic continents are either active or passive. An active margin is characterised by mountain building...
90 KB (8,844 words) - 00:33, 26 May 2025
strike-slip faults, in back-arc basins, and on the continental end of passive margin sequences where a detachment layer is present. Thrust tectonics is associated...
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the passive margin of northeastern Laurussia (Baltica craton). The suture zone between the former island arc complex and the continental margin formed...
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have occurred within a rift basin that evolved into a largely marine passive margin setting. The glacial diamictite deposits within the Huronian are on...
14 KB (1,542 words) - 05:23, 23 May 2025
continental margin coincident with the initiation of subduction. Thrust faulting uplifted and warped older sedimentary rock laid down on the passive margin. As...
85 KB (9,197 words) - 00:10, 8 May 2025
again likely submerged under a greater sea.: 116 The passive margin switched to active margin in the early-to-mid Mesozoic when the Farallon Plate under...
53 KB (4,054 words) - 10:20, 27 May 2025
portion of Patagonia was separated from Gondwana, and the resulting passive margin that formed was a site of extensive sedimentation throughout the early-middle...
33 KB (4,107 words) - 08:43, 5 April 2025
continental margin, coincident with the initiation of subduction. Thrust faulting uplifted and warped older sedimentary rock laid down on the passive margin. As...
23 KB (2,593 words) - 11:31, 3 April 2025
Krishna Godavari Basin is a peri-cratonic passive margin basin in India. It is spread across more than 50,000 square kilometres in the Krishna River and...
14 KB (1,721 words) - 12:46, 25 February 2025
South American Plate developed into a passive margin with the Proto-Caribbean Seaway. This stable passive margin allowed for thermal subsidence to occur...
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Gondwana was mostly a passive margin, hosting extensive marine deposits in areas such as northwest Africa and Tibet. The eastern margin, though warmer than...
70 KB (7,622 words) - 19:17, 23 May 2025
Thrust tectonics (section Passive margins)
on strike-slip faults and as part of detached fault systems on some passive margins. In areas of thrust tectonics, two main processes are recognized: thin-skinned...
7 KB (832 words) - 02:56, 11 November 2024