Site summaries

Site BSB-1B

Priority: Primary
Position: 56°36.695′N, 11°42.361′E
Water depth (m): 34.2
Target drilling depth (mbsf): 214
Approved maximum penetration (mbsf): 220
Seismic coverage: Primary line(s): GeoB06-012, SP 4760 Crossing line(s): GeoB06-015 (projected; distance 450 m), SP 6812, SES-96 parametric sediment echosounder
Imagery: No photography or video available.
Sampling: No marine drilling, but land drilling (Lykke-Andersen et al., 1993), gravity Core 318270-3 (FS Merian Cruise MSM-01).
Objectives (see text for details): 1. To recover the most complete sediment sequence covering the Saalian (MIS 6), Eemian (MIS 5e), and early Weichselian (MIS 2–4 and MIS 5a–5d).
2. Thick Holocene sediments can also be expected.
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, contourites (?), glacial varved clays, clayey tills, and Eemian mud.

Seismic interpretation:

0–77 m 1450 m/s Clay Marine late Holocene
77–114 m 1600 m/s Varved clay Late Glacial
114–214 m 1600 m/s Till, clay, partly deformed Glacial, interstadial/interglacial