Oceanic crust is the uppermost layer of the oceanic portion of the tectonic plates. It is composed of the upper oceanic crust, with pillow lavas and a...
15 KB (1,854 words) - 03:10, 23 June 2024
low-density mantle supporting the oceanic crust. As the oceanic plate cools, away from the ridge axis, the oceanic mantle lithosphere (the colder, denser...
36 KB (4,631 words) - 23:46, 17 June 2024
oceanic crust. Because continental crust is less dense than oceanic crust, when active margins of the two meet in subduction zones, the oceanic crust...
17 KB (2,006 words) - 01:17, 14 March 2024
secondary and tertiary crust, which correspond to oceanic and continental crust, respectively. Secondary crust forms at mid-ocean spreading centers, where...
13 KB (1,670 words) - 18:49, 26 August 2024
Convergent boundary (redirect from Convergent crust boundary)
lithosphere, and deformation. Convergent boundaries occur between oceanic-oceanic lithosphere, oceanic-continental lithosphere, and continental-continental lithosphere...
20 KB (2,374 words) - 05:34, 23 May 2024
Plate tectonics (redirect from Crustal plate)
oceanic crust and continental crust is based on their modes of formation. Oceanic crust is formed at sea-floor spreading centers. Continental crust is...
112 KB (13,659 words) - 22:00, 13 August 2024
Seafloor spreading (redirect from Oceanic spreading)
spreading, or seafloor spread, is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves...
28 KB (4,179 words) - 19:17, 11 June 2024
terrestrial planets have fairly uniform crusts. Earth, however, has two distinct types: continental crust and oceanic crust. These two types have different chemical...
11 KB (1,379 words) - 05:24, 25 July 2024
under a plate carrying an igneous oceanic plateau, the volcanism which erupts on the plateau as the oceanic crust heats up on its descent into the mantle...
11 KB (1,064 words) - 21:34, 24 March 2024
between an oceanic and an oceanic crust, creating a so-called oceanic trench. It can also take place between an oceanic and a continental crust, forming...
17 KB (2,196 words) - 03:10, 23 June 2024
The lower oceanic crust is the lower part of the oceanic crust and represents the major part of it (volumetrically biggest part). It is generally located...
12 KB (1,786 words) - 09:19, 29 July 2024
two principal types of material: oceanic crust (also called sima from silicon and magnesium) and continental crust (sial from silicon and aluminium)...
20 KB (3,088 words) - 22:47, 31 August 2024
Lithosphere (redirect from Oceanic lithosphere)
lithosphere can be divided into oceanic and continental lithosphere. Oceanic lithosphere is associated with oceanic crust (having a mean density of about...
16 KB (1,881 words) - 06:48, 31 July 2024
sediments for microorganisms. Subduction zones drag down subducted oceanic sediments, oceanic crust, and mantle lithosphere that interact with the hot asthenospheric...
67 KB (8,251 words) - 10:32, 3 August 2024
Ophiolite (section Origin as ocean lithosphere)
of Earth's oceanic crust and the underlying upper mantle that has been uplifted and exposed, and often emplaced onto continental crustal rocks. The Greek...
32 KB (3,876 words) - 01:55, 27 March 2024
Volcanic arc (redirect from Oceanic arc)
subducting oceanic tectonic plate, with the belt arranged in an arc shape as seen from above. Volcanic arcs typically parallel an oceanic trench, with...
19 KB (2,425 words) - 22:02, 8 April 2024
melting of subducted oceanic crust and the melting of thickened oceanic arc crust. The continuous melting of oceanic arc crust and mantle upwelling generated...
39 KB (3,535 words) - 01:37, 6 August 2024
the mantle at mid-ocean ridges produces oceanic crust, and partial melting of the mantle at subduction zones produces continental crust. Earth's upper mantle...
28 KB (3,157 words) - 17:37, 3 August 2024
Basement (geology) (section Continental crust)
originally been oceanic crust, but it was highly metamorphosed and converted into continental crust. It is possible for oceanic crust to be subducted...
11 KB (1,489 words) - 06:10, 29 April 2024
Geologically, an ocean is an area of oceanic crust covered by water. See also the list of seas article for the seas included in each ocean area. Though generally...
49 KB (6,556 words) - 16:26, 28 May 2024
continental crust abutting oceanic crust under coastal waters. It is one of the three major zones of the ocean floor, the other two being deep-ocean basins...
8 KB (949 words) - 07:59, 15 February 2024
Abyssal plain (category Coastal and oceanic landforms)
oceanic crust. Magma rises from above the asthenosphere (a layer of the upper mantle), and as this basaltic material reaches the surface at mid-ocean...
80 KB (9,035 words) - 11:43, 27 July 2024
Crustal structure – The landmass should consist of the continental crust, which is thicker and has a lower seismic velocity than the oceanic crust. Limits...
90 KB (8,790 words) - 21:19, 24 August 2024
provinces, extended crust and oceanic crust. Igneous and metamorphic rocks make up 90–95% of the top 16 kilometres (9.9 mi) of the Earth's crust by volume. Igneous...
48 KB (5,656 words) - 02:36, 23 June 2024
bits of continental crust), separated across a tract of ocean (and oceanic crust), approach each other, while the oceanic crust is slowly consumed at...
11 KB (1,384 words) - 16:46, 24 June 2023
into oceanic and continental crust. Beneath the ocean-floor sediments, the oceanic crust is predominantly basaltic, while the continental crust may include...
218 KB (19,278 words) - 17:27, 31 August 2024
Passive margin (section Nature of transitional crust)
distinction between active and passive margins refers to whether a crustal boundary between oceanic lithosphere and continental lithosphere is a plate boundary...
24 KB (2,909 words) - 11:08, 18 April 2024
sedimentary basins formed on oceanic crust are likely to be destroyed by subduction. Continental margins formed when new ocean basins like the Atlantic are...
47 KB (4,615 words) - 00:16, 31 July 2024
Orogeny (redirect from Crustal deformation)
intrusive igneous rock called batholiths. Subduction zones consume oceanic crust, thicken lithosphere, and produce earthquakes and volcanoes. Not all...
38 KB (4,243 words) - 21:59, 13 August 2024
crust ranges from 5–70 kilometres (3.1–43.5 mi) in depth and is the outermost layer. The thin parts are the oceanic crust, which underlie the ocean basins...
33 KB (3,140 words) - 10:12, 29 August 2024