Accession Number:

ADA017774

Title:

Report on Leg 1B of Expedition COCOTOW: Observations at the East Pacific Rise-Siqueiros Transform Fault Intersection.

Descriptive Note:

Summary rept.,

Corporate Author:

SCRIPPS INSTITUTION OF OCEANOGRAPHY SAN DIEGO CALIF MARINE PHYSICAL LAB

Personal Author(s):

Report Date:

1975-09-22

Pagination or Media Count:

13.0

Abstract:

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

Subject Categories:

  • Physical and Dynamic Oceanography
  • Geology, Geochemistry and Mineralogy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE