The mid-oceanic ridges
mountains below sea level
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Word Count
50,000 words, Guess
Page Count
200 pages
Identifiers
- Open LibraryOL1271527M
- ISBN-103540573801
- OCLC Control Number31970522
- OCLC Control Numbermidoceanicridges0000nico
- Library of Congress Control Number95002777
and 1 more
- Goodreads1921705
Classifications
- DDC551.1/36
- LCCQE511.7 .N5313 1995
Description
Despite turbulent actions of plate tectonics, continents, which since the first cooling of the planet float on its substratum, are a geological record of the history of Earth. Since the existing oceans are geologically relatively young, they register the activity, the life of the Earth. They formed when a large supercontinent (Pangea) broke apart some 150 Ma ago. The mid-oceanic ridges are narrow belts of submarine mountains marking the boundaries between plates which are moving apart, with new oceanic crust being created at the same time. Under the continents oceanic crust is subducted. The ocean bottom is an ideal location to study recent geodynamic processes on Earth. Of special interest to the reader will be the combination of the most recent oceanographic data with ophiolites, representing fossil ocean crust, obducted onto the continents by tectonic processes.
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