. Bulletin of the Geological Society of America. Geology. l)'2S K. M. KINDLE DEb\)KIM ATIOK IN NOVA SCO'JM A AND ONTARIO thick. The sand of these delta deposits, where it is in contact witli the side of the tank, shows as a black band above the clay in lignres 4 and 5. The inequality of the load of sediment thus placed on the soft clay bed resulted in the unequally weighted clay breaking through the weakest point in the sand-bed covering it and forming a small clay dome or plug extending through the sand, as seen in the photograph, figure 4, directly under the arrow. This occurred at the compl
. Bulletin of the Geological Society of America. Geology. l)'2S K. M. KINDLE DEb\)KIM ATIOK IN NOVA SCO'JM A AND ONTARIO thick. The sand of these delta deposits, where it is in contact witli the side of the tank, shows as a black band above the clay in lignres 4 and 5. The inequality of the load of sediment thus placed on the soft clay bed resulted in the unequally weighted clay breaking through the weakest point in the sand-bed covering it and forming a small clay dome or plug extending through the sand, as seen in the photograph, figure 4, directly under the arrow. This occurred at the completion of the second delta. After this photograph was taken the sand load on the clay was consider- ably increased to a nearly uniform depth over the clay. By means of. i Figure 4.—Stratified Clays (iciwsited from Water in experimental Tanlc Showing- "mud lump" and deformation produced by differential weighting of the clay beds with sand. The surfaces of each of the four strata below the sand were perfectly horizontal before the introduction of the sand. Note the great disturbance of the char- coal band in lower half of section and the clay plug pushed through the sand below the arrow. current scour the sand was then somewhat reduced in thickness at one point, a small tube being used to introduce a stream of water for this purpose. Additional pressure was then placed on the sand by means of a bag of shot. This resulted in the clay slowly rising at the point where the sand load had been reduced on the side of the tank by scour (figure 5). The mass squeezed out through the sand assumed the shape on the upper surface of a steep-sided half dome, the contact with the face of the tank preventing the formation of a complete dome. The plug of clay continued to rise till it was slightly above the surface of the water in the tank. Examination of the photographs shows that marked disturbance. Please note that these images are extracted from scanned page images that may have bee
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectgeology, bookyear1890
