sea-floor spreading hypothesis 沿大洋中部穿透岩石圈的裂缝或裂谷向两侧扩展并导致新生洋壳的学说。它认为地幔物质在这种裂缝带下因软流圈内的物质上涌、侵入和喷出而形成新的洋壳,随着这个作用不断进行,新上涌侵入的地幔物质把原已形成的洋壳向裂谷两侧推移扩张,致使洋底不断新生和更新。由于洋壳不断向外推移,及至海沟岛
The presence of ophiolitic rocks, included sheeted dikes, in the Proterozoic and Archean indicates sea floor spreading throughout Earths history. The Proterozoic may have begun when oceanic crust thinned to a subductable thickness.MOORES, Eldridge M...
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2—eds.). The tsunami resulted in flooding of the Electric Equipment Room (containing switchgears, power center, batteries, power source for Reactor Protection System) located on the underground floor of Turbine Buildings of Units 1–4, which almost completely (with exception of DC power in ...
Answer to: When four legged animals walk, they always have three of their legs on the ground at any instant. Explain why using the concept of...
that many full-flavored ingredients has a high risk of failure. And, with that many variables in play in each drink, there’s no way of predicting whether my $20 is being advanced for something heady and delightful or something that tastes like water mopped up from a flower-shop floor. ...
Introduction to Pre-event Assignments The below seven assignments are vital to reaching an understanding of specific and critical core elements that go into the creation of a commercially viable genre novel or narrative non-fiction. Of course, there is m
Most geosynclinal sediments are results more than causes of orogenesis; an orthogeosyncline is simply a sediment-filled orogenic belt. The early, strictly uniformitarian sea-floor spreading model for geosynclines was unacceptable because it re...
Prasad Patel flopped over on his bedroom floor with a warm grin. This golden Sunday had rolled out a trim carpet of shimmering light to deliver him to his moment in the sun. Tomorrow, he’d cross the threshold of adolescence and graduate to the big One-Oh. Double digits. Ten. Freaking...