(Table 1) Core intervals of sediment core CRP-3 that have been stitched and reorientated to North

• Main Authors: Jarrard, Richard D, Paulsen, Timothy S, Wilson, Terry
• Format: Dataset
• Language: English
• Published: PANGAEA 2001
• Subjects: Angle; Cape Roberts Project; Confidence; Core wireline system; CRP; CRP-3; CWS; Depth; bottom/max; sediment/rock; top/min; Number of observations; Ross Sea; Sampling/drilling from ice; Standard deviation
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.465903; https://doi.org/10.1594/PANGAEA.465903

CRP-3 cores were not orientated with respect to North during coring operations. However, borehole televiewer (BHTV) logging did obtain azimuthally orientated images of the borehole wall, and core processing included digital imaging of the outer surface of 85% of the cores. Images of many individual core segments can be digitally joined, or stitched, by rotating them to match the shapes of their adjoining surfaces and then closing the gap. By aligning features (fractures, bedding, and clasts) on stitched-core images with correlative features on orientated BHTV images, we reorientated 231 m of core, or 25% of the cored interval. We estimate that the orientation uncertainty is ±10° for entire stitched-core intervals, and ±15° for individual features such as a single fracture or palaeomagnetic sample. Reliability of core orientations was confirmed by comparing azimuths of bedding and fractures measured directly within these reorientated cores to those measured within orientated borehole televiewer images.