. Bulletin of the Department of Geology. Geology. 1918] Davis: The Radiolarian Cherts of the Franciscan Group 285 In some of the beds, the laminae are seen to abut upon the bound- ing surface of the bed at a notable angle (fig. 12). This is also shown in plate 34a. This relation also might be explained as due to scour- ing of the currents which deposited the coarser sediments. Occasionally a layer of chert will show a lenslike termination. In such instances the laminae of the chert may follow the walls of the. Fig. 12. Discordance between lamination and bounding Please note that thes
. Bulletin of the Department of Geology. Geology. 1918] Davis: The Radiolarian Cherts of the Franciscan Group 285 In some of the beds, the laminae are seen to abut upon the bound- ing surface of the bed at a notable angle (fig. 12). This is also shown in plate 34a. This relation also might be explained as due to scour- ing of the currents which deposited the coarser sediments. Occasionally a layer of chert will show a lenslike termination. In such instances the laminae of the chert may follow the walls of the. Fig. 12. Discordance between lamination and bounding 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 University of California, Berkeley. Dept. of Geology. Berkeley : The University Press
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