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1 Kansas Geological Survey, 1930 Constant Avenue, Lawrence, Kansas 66047, USA
One of the most important steps in the analysis and correlation of stratigraphic data is establishing an age model or line of correlation (LOC) for an individual core hole or stratigraphic section. Chronos Age-Depth Plot (ADP) is a Java re-implementation of an earlier Macintosh program for plotting ages of stratigraphic events versus depth and interactively fitting an LOC to those data. ADP is delivered from the Chronos Web site via Java Web Start and runs locally on the user's machine, allowing access to local data files as well as data from the Neptune database via a geographic-information-system interface. ADP allows the user to develop an LOC using a palette of tools for adding, moving, and deleting LOC control points. In addition, the user is able to zoom in to a more detailed view of different plot regions, toggle the display of different plot groups, and edit plot and axis titles and labels. Output options include saving the LOC control point data, the event data projected to the LOC, and the plot itself in portable-network-graphics (PNG), Joint-Photographic-Experts-Graphic (JPEG), or scalable-vector-graphics (SVG) format. The SVG output file is designed for convenient editing of various plot characteristics, with font and line characteristics for various plot elements and the palette of plotting symbols defined at the top of the file. In addition to being a useful application in its own right, ADP serves as a prototype for other clients interfacing with the Web services provided by the Chronos portal.
Keywords: paleontology • geoinformatics • Java • databases
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