一、洋中脊(Mid-ocean ridges) 1、指贯穿世界四大洋、成因相同、特征相似的海 底山脉系列。全长6.5×104km ,占洋底面积的 … www.docin.com|基于8个网页 2. 中大洋脊 中大洋脊(mid-ocean ridges)中大洋脊(mid-ocean ridges)是什麽? tw.knowledge.yahoo.com|基于6个网页 ...
The presence of mid - ocean ridges is evidence of which plate movement? A. Plates moving sideways B. Plates colliding C. Plates moving apart 相关知识点: 试题来源: 解析 C。解析:大洋中脊是板块运动的重要证据之一。在大洋中脊处,板块是相互分离的,新的岩浆从地幔上升到地壳表面,形成新的岩石,从而...
Learn the mid-ocean ridge definition and see a mid-ocean ridge example. Find out what causes mid-ocean ridges and what happens at a mid-ocean ridge.
Mid-ocean ridges do not form straight lines but are instead offset in many places by fracture zones, or transform faults. Fracture zones are thought to occur due to zones of weakness in the pre-existing continent before it was rifted apart. Most mid-ocean ridges are divided into hundreds of...
Mid-Ocean Ridges: Fine Scale Tectonic, Volcanic and Hydrothermal Processes Within the Plate Boundary Zone 来自 mendeley.com 喜欢 0 阅读量: 159 作者: Macdonald,K C 摘要: The fine-scale tectonic, volcanic, and hydrothermal processes of mid-ocean ridges are reviewed, including the three-dimensional...
for the adequate mapping of expected small-scale structures induced by, for example, lithosphere subduction, deep mantle upwellings, and mid-ocean ridges. ... H Bijwaard,W Spakman,ER Engdahl - 《Journal of Geophysical Research》 被引量: 2347发表: 1998年 Geologically current plate motions Six sm...
MID-OCEAN RIDGES IN ATLANTIC AND INDIAN OCEANS, AND CONTINENTAL DRIFTPROBLEM TO BE SOLVED: To clarify the relation of continental drift with mid-ocean ridges in Atlantic and Indian Oceans, and also to clarify the relation of meteorites with continent separation.KOBORI SHIZU...
Mid-ocean ridges (MORs) are quintessential sites of tectonic extension1,2,3,4, at which divergence between lithospheric plates shapes abyssal hills that cover about two-thirds of the Earth’s surface5,6. Here we show that tectonic extension at the ridge axis can be partially undone by tectoni...
Mid-ocean ridges Abstract A map of the ocean basins (Fig. 5.1) shows that their most conspicuous topographic feature is the system of mid-oceanic ridges, the crests of which rise on average 1000–3000 m above the adjacent ocean floor. Such ridges extend through all the major ocean basins,...
Studies of mid-ocean ridges in the Pacific and Atlantic oceans show that the volcanism that forms the oceanic crust along the spreading-plate boundaries is concentrated at regular intervals related to spreading rate. This observation and a new calculation for a Rayleigh–Taylor type of gravitational...