. Collected reprints, Essa Institute for Oceanography. Oceanography 140° CHALLENGER SNELLIUS EXPEDITION CORES SWEDISH DEEP SEA EXPEDITION CORES PIONEER (USCaGS) TRENCH CORE POSITIONS ^MINDANAO '/, TRENCH /264 â 108 -271 225 ,/M MARIANA - TRENCH <o '&*§ *^_. Location of cores taken in the Java, Mindanao and Mariana Trenches. Features diagnostic of turbidites Similarity between the sediment properties described on the following pages and the properties of turbidites listed by Kuenen (1964a) is presented as evidence of turbidites in the Indo-Pacific Trench cores. Max
. Collected reprints, Essa Institute for Oceanography. Oceanography 140° CHALLENGER SNELLIUS EXPEDITION CORES SWEDISH DEEP SEA EXPEDITION CORES PIONEER (USCaGS) TRENCH CORE POSITIONS ^MINDANAO '/, TRENCH /264 â 108 -271 225 ,/M MARIANA - TRENCH <o '&*§ *^_. Location of cores taken in the Java, Mindanao and Mariana Trenches. Features diagnostic of turbidites Similarity between the sediment properties described on the following pages and the properties of turbidites listed by Kuenen (1964a) is presented as evidence of turbidites in the Indo-Pacific Trench cores. Maximum grain sizes The coarsest particles in the trench sediments fall within Kuenen's (1964) size limits. Grain sizes at the first percentile are coarser than very fine sand ( phi) in Java and Mariana Trench sediments, and fine sand ( phi) in Mindanao Trench sediments. Grading Pronounced grading occurs in the Java Trench core. A bed grades phi units over 10 cm in one case. Less well-defined graded beds occur throughout the core. Size grading was not observed in the sediments in the Mindanao Trench core; however, the contacts between beds of coarse and of fine texture are often transitional over several centimeters. This grading of texture can be considered as graded bedding in this core. In the Mariana Trench core, the size and abundance of mud lumps grades uniformly in beds up to 20 cm thick. There is no corresponding gradation in mean grain size in these sediments. Marine Geo!., 5 (1967) 141-154. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Institute for Oceanography; Atlantic Oceanographic Laboratories (U. S. ); Pacific Oceanographic Laboratories; United States. Environmental Science Services Administration. Research Laboratories. Washington, D. C. : U. S. Dept. of Commerce, Environmental
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