Report on Leg 1B of Expedition COCOTOW: Observations at the East Pacific Rise-Siqueiros Transform Fault Intersection.
SCRIPPS INSTITUTION OF OCEANOGRAPHY SAN DIEGO CALIF MARINE PHYSICAL LAB
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The second half of COCOTOW I Expedition concentrated on near-bottom geological and geophysical investigation near 8 deg 17 min N and 104 deg 10 min W. Detailed structural analysis of the East Pacific Rise Siqueiros Transform Fault intersection revealed a complex arrangement of lineations which can be subdivided into three trends 1 N-S constructional outliers protrude into the deep tow basin from the East Pacific Rise. Normal crustal spreading is occurring well within the northern confines of the survey area 2 major E-W aligned scarps, along the fracture Zone Median Ridge, have vertical offsets up to 350 fathoms and 3 The formation of WNW-ESE trending tension gashes reveal a component of extension across the fracture zone. Author
- Physical and Dynamic Oceanography
- Geology, Geochemistry and Mineralogy