Revised Chronology of Neogene DSDP Holes from the World Ocean: Lazarus et al., 1995



The following pages show age-depth plots for each hole analysed. At least one plot is given for a hole, and where the density of data requires it, several plots are given for expanded parts of the total section. All plots were created with the ADP program described in Lazarus (1992a), which gives additional details of plotting procedures, conventions, and usage. All plots were originally created in color, which adds considerably to their readability. For economy they are reproduced here in black and white, although the computer file versions retain all color information. In all plots, depth runs vertically down the page, age horizontally, increasing to the right. A paleomagnetic polarity scale (Berggren et al., 1985) is plotted on all figures along the bottom margin, regardless of whether paleomagnetic data was actually available or not. Paleomagnetic polarity data, when available, is entered as just another data type. In a few plots, the actually polarity pattern vs. depth in section is also plotted along the left hand margin. Cores are plotted vs depth on the right hand side of each plot. The actual recovery of each core was used, with incomplete recovery between cores thus leaving a visible gap. The short red lines within the cores are section marks, spaced at 1.5 meter intervals from the top of each core. Note that, due to a change in core labeling conventions by DSDP, the absolute total depth in mbsf of these section marks (and data points positioned relative to them) may not precisely correspond to the mbsf values used in older DSDP volumes (pre Leg 47), although the differences are usually less than 50 cm.

Labels along the top of the plot give the symbol type for each data type: D-diatoms, F-planktonic foraminifers, M-paleomagnetic polarity boundary, N-calcareous nannofossils, R-radiolaria. Additional special data types and symbols are usually noted in the comments line at the lower right corner of each plot. The file name/version number of the line of correlation (continous line on plot) is given at the lower left, while the loc creation date is at the upper right. Each data point plotted is labeled with a short combination of letters. The full name of each of these data points can be found in Chapters 4 and 5. Labels have been arranged so that in most cases the association between label and data point should be clear. However, the group to which a label belongs can also identified by conventions usually used for each group. Diatom event labels are 3 letters long, with the first letter and last letter in lowercase. Foram event labels are 4 letters long, first letter uppercase, the remaining letters usually lowercase. Magnetostratigraphic events are all caps, and include the number of the polarity chron. Nannofossil events are also 4 letters long, but the first two letters are usually uppercase and separated by a space. Lastly, radiolarian event labels are in all caps, 5 letters long, with no spaces between letters or numbers in the label.

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