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(This is a re-release of a report that was originally published as pages from a copy machine. It was scanned and saved as a PDF file.) Interpretation of modern sedimentary environments requires an understanding of sub-seafloor sedimentary character. This is especially true on the Arctic shelves where ice-gouging activity influences sediments to depths of a meter or more on an annual basis such that surficial sedimentary parameters do not entirely reflect ongoing geologic processes. Knowledge of substrate character is also a precondition for safe and efficient offshore development activities.Preliminary insight into substrate character was obtained using a vibratory coring device to obtain cores up to 180 cm in length at 60 locations on the inner Beaufort Sea shelf. Locations were chosen from several different geologic environments. Three of these environments could be crudely characterized. This report provides the marine geologist and soils engineer with the field and laboratory methodology used and a preliminary interpretation of sedimentary environments together with descriptions, sketches, photographs, and radiographs of the cores. A general treatment of the shelf sedimentary environment is not given here; this paper gives references for such reports. In the first section of this report, we describe the coring procedures and methodology used in processing the cores. This section is followed by preliminary discussion of the sedimentary environments illuminated by the cores. The data, in the form of core descriptions, is contained in the appendix. |
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