OCEANOGRAPHIC CRUISE SUMMARY RECONNAISSANCE SURVEY OF NORTHERN MID-OCEANIC RIDGE.

• Main Author: Johnson, G. Leonard
• Other Authors: NAVAL OCEANOGRAPHIC OFFICE NSTL STATION MS
• Format: Text
• Language: English
• Published: 1967
• Subjects: Physical and Dynamic Oceanography; (*OCEAN BOTTOM TOPOGRAPHY; ATLANTIC OCEAN); MARINE GEOPHYSICS; OCEANOGRAPHIC DATA; GEOMAGNETISM; BATHYTHERMOGRAPH DATA; OCEANOGRAPHIC SHIPS; DEEP WATER; MAPS; FAULTS(MARINE); NORTH ATLANTIC OCEAN; RIDGES(MARINE); Greenland; Jan Mayen; Jan Mayen Fracture Zone; Iceland; North Atlantic
• Online Access: http://www.dtic.mil/docs/citations/AD0817251; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0817251

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)