Figure F4. Average core recovery, selected logging data annotated with physical property measurements on cores, and some petrologic observations for units drilled at Site 1253 during Leg 205. Major and minor petrologic boundaries are indicated. Zones labeled 1 to 6 at the base of the lower igneous unit (Subunit 4B) indicate the following observations: 1 = location of basaltic horizon; 2 = greater number of magmatic contacts; 3 = more veins or voids filled with holo- and cryptocrystalline groundmass/altered glass, clay, and zeolites; 4 = up to 5% degree of alteration within 1 m of Section 205-1253A-37R-1 and higher abundance of voids filled with clays and zeolites, ending in an homogeneous microcrystalline gabbro; 5 = increasing number of centimeter-scale fractures and veins; and 6 = homogeneous microcrystalline to fine-grained gabbro with very weak magmatic contacts. Subunit 3C is a calcareous sedimentary horizon. Modified after Morris, Villinger, Klaus, et al., 2003.

Figure F4. Average core recovery, selected logging data annotated with physical property measurements on cores, and some petrologic observations for units drilled at Site 1253 during Leg 205. Major and minor petrologic boundaries are indicated. Zones labeled 1 to 6 at the base of the lower igneous unit (Subunit 4B) indicate the following observations: 1 = location of basaltic horizon; 2 = greater number of magmatic contacts; 3 = more veins or voids filled with holo- and cryptocrystalline groundmass/altered glass, clay, and zeolites; 4 = up to 5% degree of alteration within 1 m of Section 205-1253A-37R-1 and higher abundance of voids filled with clays and zeolites, ending in an homogeneous microcrystalline gabbro; 5 = increasing number of centimeter-scale fractures and veins; and 6 = homogeneous microcrystalline to fine-grained gabbro with very weak magmatic contacts. Subunit 3C is a calcareous sedimentary horizon. Modified after Morris, Villinger, Klaus, et al., 2003.