Brief descriptions of the cores recovered from four holes drilled at four sites along Transect EG64 are provided below. A summary of the drilled cores is given in Table T1. Basement recovery was restricted for the same reasons as for the previous transects. Igneous material was only recovered at two of the six sites.
The hole penetrated to a depth of 3.00 meters below seafloor (mbsf) without recovery.
The hole penetrated to a depth of 2.10 mbsf without recovery.
Hole SEG69A penetrated 0.20 m before coring began and terminated at 1.94 mbsf. Unit S-1 is 19 cm of rounded to subrounded, pebble-sized rock fragments that include sandstone, gneiss, and breccia. The volcanic basement was not sampled at Site SEG69.
Hole SEG70A penetrated 0.32 m before coring began and terminated at 0.88 mbsf. Unit I-1 is 61 cm of vesicular and amygdaloidal, highly plagioclase-clinopyroxene-olivine phyric and glomerophyric basalt, containing 20% plagioclase, 2% clinopyroxene, and small amounts of olivine phenocrysts. The volcanic basement was sampled at Site SEG70.
Two holes were drilled at Site SEG71. Hole SEG71A penetrated 0.84 m before coring began and terminated at 1.92 mbsf. Unit I-1 is 34 cm of fine- to medium-grained aphyric diabase, containing olivine (1%), clinopyroxene (33%), plagioclase (50%), and Fe-Ti oxide minerals (4%). All olivines are altered to a green clay mixture. Hole SEG71B penetrated 0.60 m before coring began and terminated at 1.42 mbsf. Unit S-1 is 9 cm of angular to subangular gravel- to pebble-sized clasts. The clasts are gneissic and basaltic in composition. Three of the clasts are fragments of leucocratic gneiss consisting of quartz, garnet, brown mica, and tourmaline. The igneous unit recovered at Site SEG71 is a dike or sill. The volcanic basement was sampled at Site SEG71.
The hole penetrated to a depth of 3.00 mbsf without recovery.