Figure F3. Summary of basement and borehole observatory characteristics, Holes 1027C and U1301B (modified from Fisher et al., 2008). A. Basement recovery, primary lithology, borehole size, and bulk density, Hole U1301B (see the "Expedition 301 summary" chapter). Basement cores were collected from ~355 to 575 mbsf (~100 to 320 msb), with recovery indicated by black intervals next to depth column. Borehole diameter was measured with wireline caliper tool. Note large washed-out intervals above 470 mbsf (220 msb). Bulk density log (line) and analyses of pieces of rock (diamonds) show evidence for considerable porosity in uppermost basement and a layered basement structure especially below 470 mbsf (220 msb), with alternating more and less dense intervals. Horizontal bands = depths where CORK casing packers and the drill string packer used for hydrogeologic testing were set against the borehole wall. B. Casing and CORK configurations, Holes U1301B and 1027C. TD = total depth.
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