Site summaries (continued)

Site BSB-8B

Priority: Will not be attempted because of ammunition dump safety concerns. Alternative Site BSB-7B will be utilized.
Position: 55°17.258′N, 15°28.917′E
Water depth (m): 93
Target drilling depth (mbsf): 93
Approved maximum penetration (mbsf): 93
Seismic coverage: Primary line(s): GeoB06-079, SP 40660, SES-96 parametric sediment echosounder
Imagery: No photography or video available.
Sampling: No marine drilling, but land drilling (Lykke-Andersen et al., 1993), Core 318270-3 (vibro core), Core 318280-5 (vibro core) (FS Merian Cruise MSM-01).
Objectives (see text for details): To drill and recover early and mid-Weichselian lake sediments in deepwater phase.
Drilling Program: Up to 3 × APC to refusal, XCB to target depth and up to 5 short cores to capture the upper 0.75 m of the sequence undisturbed. One additional core for the deep biosphere theme.
Downhole logging program: Standard logging suite: neutron-porosity, lithodensity, gamma ray, resistivity, acoustic, and formation image.
Anticipated lithology: Holocene mud, glacial varved clays, glacial tills, and Eemian mud.

Seismic interpretation:

0–47 m 1450 m/s Clay, varved clay Marine late Holocene, late Glacial
47–93 m 1600 m/s Till, clay, partly deformed Glacial, interstadial/interglacial