. Collected reprints, Essa Institute for Oceanography. Oceanography 148 W. A. ANIKOUCHINE AND H. Y. LING Mud lumps Mud lumps occur in all three cores. They are about 1 mm in diameter in the Mariana Trench core and about 1 cm in diameter in the Mindanao Trench core (Plate IA). Only a few large (up to 3 cm in diameter) lumps occur in the Java Trench core. The lumps have the same color as the surrounding sediment. An analysis of mud lumps indicated that they are not aggregations of the sur- rounding fine-textured sediment. Sand-silt-clay ratios for disaggregated mud lumps are plotte
. Collected reprints, Essa Institute for Oceanography. Oceanography 148 W. A. ANIKOUCHINE AND H. Y. LING Mud lumps Mud lumps occur in all three cores. They are about 1 mm in diameter in the Mariana Trench core and about 1 cm in diameter in the Mindanao Trench core (Plate IA). Only a few large (up to 3 cm in diameter) lumps occur in the Java Trench core. The lumps have the same color as the surrounding sediment. An analysis of mud lumps indicated that they are not aggregations of the sur- rounding fine-textured sediment. Sand-silt-clay ratios for disaggregated mud lumps are plotted , 6 and 7 as open circles. Ratios for the sediments including mud lumps are plotted as solid circles. The sediments from the Mindanao Trench core have sand-silt-clay ratios that fall along the dashed line in Because mud lumps fall in the sand size, their removal from the sediment should not affect the silt-clay ratio of the remaining material and the ratio should remain that indicated by the dashed line in Ratios for disaggregated mud lumps do not fall near the dashed line, indicating a silt-clay ratio different from that of the complete sediment. In the sediments from the Mariana Trench core (), there is no linear trend in sand-silt-clay ratios. However, a line drawn through the sand apex and a solid circle intersects the silt-clay axis at a point representing a silt-clay ratio lower than that of the mud lumps removed from that sediment. It appears that these mud lumps are not formed in situ. CLAY. SAND^ *SILT Java Trench core triangular diagram of size components. Marine Geol., 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. Enviro
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