Initial Reports of the Deep Sea Drilling Project - Volume 10

This volume covers Leg 10 of the cruises of the Drilling Vessel Glomar Challenger. Leg 10 of the Glomar Challenger was the first leg of the second phase of the Deep Sea Drilling Project. The second phase was well justified by the results of the first phase—18 months of drilling. Glomar Challenger sailed from Galveston, Texas, on February 13, 1970. Due to delays, the time permitted for the cruise leg was extended and the leg ended in Miami on April 5,1970. During the leg, holes were drilled at thirteen sites. Because of drilling restrictions, many of the proposed sites had to be neglected and new sites and objectives were chosen by the scientific staff on board. The planned objectives of the Gulf Coast Site Selection Board were: 1) delineation of the Sigsbee Deep and associated continental rises; 2) evaluation of the various features believed to be associated with salt tectonics; 3) determination of the nature of the Florida and Campeche scarps; 4) investigation of the Mississippi Deep Sea Fan; and 5) the study of the transition from the Gulf of Mexico to the Straits of Florida. Most of these objectives could not be achieved because of the drilling restrictions imposed just prior to and during the leg, but significant drilling results were obtained in spite of these restrictions.