There are two approved site-specific locations, designated 8B-2 and 8B-3.
Both are discussed.
Position: 8B-2: 39° 23.0124'N, 72° 43.6350'W; 8B-3: 39° 22.9488'N, 72° 43.6988'W
Water Depth: 8B-2: 87 m; 8B-3: 88 m
Sediment Thickness: both sites, ~10 km
Approved Maximum Penetration: 8B-2: 1166 mbsf, 8B-3: 1165 mbsf
Seismic Coverage: 8B-2: at the crossing of seismic lines Oceanus 270 #147 (cdp 10359/shot 14.97) and #806 (cdp 10264/shot 11.00); 8B-3: at the crossing of seismic lines Oceanus 270 #806 (cdp 10288/shot 12.00) and #885 (cdp 10238/9.91) These lines are shown in accompanying figures.
Objectives: The objectives of MAT-8B are to:
1.Date major Oligocene-Holocene unconformities on the New Jersey margin and evaluate their correlation with glacial-eustatic age estimates obtained from the deep-sea d18O record; this site will concentrate on surfaces that are middle Miocene (m3) and younger.
2.Place constraints on the amplitudes and rates of sea-level change that may have been responsible for unconformity development.
3.Assess the lithostratigraphic response of changes in sequence architecture to glacial-eustatic forcing.
4.Provide a baseline for future scientific ocean drilling that will address the effects and timing of sea-level changes on this and other passive margins.
Drilling Program: Double APC/XCB to refusal holes A and B; APC/XCB to refusal, then RCB (after installation of FFF) to TD at Hole C (see Fig. 7).
Logging and Downhole Operations: Triple-Combo, FMS-Sonic, WST, VSP to TD at Hole C; Logging While Drilling* to TD at Hole D (see Fig. 7).
Nature Of Rock Anticipated: Sands, silts, and clays; subordinate gravel.
Seismic lines 8B map
Seismic section 8B-2
Seismic section 8B-3
Seismic section 8B-3 and 8B-2
*LWD tools: CDR, CDN (see preceding text).
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