TAILIEUCHUNG - Marine Geology Phần 10

Sạt lở đất một kiến tạo xuống dốc nhanh chóng của vật liệu trái đất gây ra bởi động đất và Langmuir thời tiết khắc nghiệt lưu thông gần bề mặt xen kẽ các xoáy liên kết theo chiều gió. | MARINE GEOLOgy landslide a rapid downhill movement of earth materials triggered by earthquakes and severe weather Langmuir circulation near-surface alternating vortices aligned downwind generated by the interaction of waves and mean shear currents Laurasia lure-AY-zha a northern supercontinent of Paleozoic time consisting of North America Europe and Asia Laurentia lure-IN-tia an ancient North American continent lava molten magma that flows out onto the surface limestone a sedimentary rock composed of calcium carbonate that is secreted from seawater by invertebrates and whose skeletons compose the bulk of deposits lithosphere LI-tha-sfir the rocky outer layer of the mantle that includes the terrestrial and oceanic crusts the lithosphere circulates between Earth s surface and mantle by convection currents lithospheric plate a segment of the lithosphere the upper-layer plate of the mantle involved in the interaction of other plates in tectonic activity lysocline the ocean depth below which the rate of dissolution just exceeds the rate of deposition of the dead shells of calcareous organisms magma a molten rock material generated within Earth and that is the constituent of igneous rocks magnetic field reversal a reversal of the north-south polarity of Earth s magnetic poles magnetometer a devise used to measure the intensity and direction of the magnetic field manganese nodule a cobble-shaped ore on the deep-sea floor which is rich in manganese and iron mantle the part of a planet below the crust and above the core composed of dense rocks that might be in convective flow massive sulfides sulfide metals deposited from hydrothermal solutions megaplume a large volume of mineral-rich warm water above an oceanic rift Mesozoic MEH-zeh-ZOE-ik literally the period of middle life referring to a period between 250 and 65 million years ago metamorphism me-teh-MORE-fi-zem recrystallization of previous igneous metamorphic and sedimentary rocks created under extreme temperatures and

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