. Bulletins of American paleontology. 154 Bulletin 361 1995n 0- 1990- 1985- 25- 1980- 1975- a 1970- 50- 1965- 1960- 75-1 -r Pass Key Core 37 CONISS P 04 Total sum of squares Text-figure 9.—A stratigraphically constrained cluster analysis of the Pass Key core 37 diatom assemblages. The Y axis shows sediment depth with the top of the core at the top of the diagram. The second Y axis shows dates based on Pb-210 analyses. The samples counted and diatom zones are indicated on the left. in the 24-26 cm sample, decreasing to in the 20—22 cm sample and then resuming a gradually incre
. Bulletins of American paleontology. 154 Bulletin 361 1995n 0- 1990- 1985- 25- 1980- 1975- a 1970- 50- 1965- 1960- 75-1 -r Pass Key Core 37 CONISS P 04 Total sum of squares Text-figure 9.—A stratigraphically constrained cluster analysis of the Pass Key core 37 diatom assemblages. The Y axis shows sediment depth with the top of the core at the top of the diagram. The second Y axis shows dates based on Pb-210 analyses. The samples counted and diatom zones are indicated on the left. in the 24-26 cm sample, decreasing to in the 20—22 cm sample and then resuming a gradually increasing trend toward the top of the core. The high- est ratios occur between 36 and 24 cm ( 1979- 1985). DISCUSSION Russell Bank 1882-1949 The bottom zone I ( 1882-1888; 130-138 cm) in Russell Bank core 19A is difficult to interpret due to the poor diatom valve preservation. Many of the. 0 Difference. 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 Paleontological Research Institution (Ithaca, N. Y. ); Columbia University. Ithaca, N. Y. , Paleontological Research Institution [etc. ]
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