Three gravity cores (IM02bis, IM03, IM05) and one piston core (PI40) were split, photographed and described. The digital photos were recorded every 30 cm for all core sections. Core descriptions were entered on standard forms provided by the IGM Institute and the format for description (lithology, accessories, and contacts) followed the Ocean Drilling Program standard procedures. Graphic description of the cores (IM03, IM05, and PI40) was saved as PostScript files (see Figures 42 to 44 of Appendix 8). The size fraction of the core catchers greater than 63 micron was preliminary studied for sediment and faunal assemblage characterization. These observations permitted to identify the environments of deposition and they were incorporated in the visual and graphic core descriptions.
Two gravity cores (IM03 and 05) collected for paleoseismological purposes were sampled for characterizing mass-wasting events, their timing and stratigraphy. Future analyses to be conducted include: core x-ray, grain size, calcium carbonate, organic carbon, bulk and clay mineralogy, oxygen and carbon isotopes, radiocarbon dating and biostratigraphy.
Fig. 37 shows one of the cores that were opened, described and sampled.
