OCEANOGRAPHIC CRUISE SUMMARY RECONNAISSANCE SURVEY OF NORTHERN MID-OCEANIC RIDGE.
A joint U.S. Naval Oceanographic Office and U.S. Coast Guard geological, geophysical survey was conducted during the summer months of 1966 on that portion of the mid-oceanic ridge that lies north of Iceland. Preliminary analysis of the data delineates the general form, magnetic signature, and size o...
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Format: | Text |
Language: | English |
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1967
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Online Access: | http://www.dtic.mil/docs/citations/AD0817251 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0817251 |
Summary: | A joint U.S. Naval Oceanographic Office and U.S. Coast Guard geological, geophysical survey was conducted during the summer months of 1966 on that portion of the mid-oceanic ridge that lies north of Iceland. Preliminary analysis of the data delineates the general form, magnetic signature, and size of the mid-oceanic ridge and several small related fracture zones. It was found that the mid-oceanic ridge between Iceland and Jan Mayen has an average width of about 60 miles and a poorly developed rift valley. East of Jan Mayen, the mid-oceanic ridge is well developed with a rift valley and flank provinces. It had been previously thought that the Jan Mayen Fracture Zone struck east-west in the region east of 5 degrees W. and 71 degrees N. Instead, it was found to be an en echelon feature striking northwest-southeast. This fracture zone extends from the base of the Greenland continental slope to the Norwegian coast. (Author) |
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