User Name
Remember my login
Create new account 
Forget your password?
tab inactive left border CHRONOS tab inactive right border tab inactive left border Searches tab inactive right border tab active left border Tools tab active right border tab inactive left border Resources tab inactive right border 
 Index   3rd Party Tools   Age Depth Plot   Age Range Chart   TimeScale Creator   TimeScale Converter   WorkFlows 

Searches for data can be done at the Search Section
Tutorials are available for tools (Look for the button)
Most of the on-line applications use Java. Some of the application style tools can run via web start. Look for the web start button. Other will run in your browser or can be downloaded. GetJava Download Button
Metadata (DOAP) about each tool is available on their respective pages
Wikipedia WVisit WikiPedia entry on metadata
RDF Resource Description Framework Metadata Icon
Web and ReST services details in the "for developers" section (Contact CHRONOS if you want to use a search, service or widget in your web site, we can assist you)
Wikipedia WVisit WikiPedia entry on ReST
Wikipedia WVisit WikiPedia entry on Web Services

  • Age Depth Plot:(see subsection above)
    Age Depth Plot
    The CHRONOS Age-Depth plotting program, ADP, is a Java re-implementation of the ADP program written by Dave Lazarus for the Macintosh ( Lazarus, 1992, Lazarus, 1995). It reads paleontological age-depth data from the Neptune database or from local files, plots those data, and allows interactive fitting of a line of correlation or age model. The plot may be saved in Scalable Vector Graphics (SVG) format or as PNG or JPEG file.
  • Age Range Chart:(see subsection above)
    Age Range Chart
    Age Range Chart (ARC) is a tool for plotting the occurrences vs. age for multiple species in different holes. Occurrences are plotted as dots or blocks, sized according to species abundances and colored by species. Hiatus information are also shown. Data from multiple holes are plotted in paralell columns. The program reads data from CHRONOS Neptune database and displays the results in SVG (Scalable Vector Graphic) format, which is rendered into a Java Applet Viewer. Other formats like PNG, JPEG and TIFF are also available for various usages.
  • CONOP9 Web service:(see subsection above)
    CHRONOS has started work on a web services based version of the CONOP9 graphic correlation program. This system is still very much in its early stages, but is completely usable in this early form.
  • Psicat:(see subsection above)
    The CHRONOS Paleontological Stratigraphic Interval Construction and Analysis Tool, PSICAT, is a stand-alone Java based graphical editing tool for creating and viewing stratigraphic column diagrams from drill cores and outcrops. It is customized to the task of working with stratigraphic columns and captures data digitally as you draw and edit the diagram.
  • TimeScale Comparison:(see subsection above)
    TimeScale Comparison
    Timescale Comparison is a tool for comparing different versions of proposed geological time scale in the history. The comparisons can be made for different subdivisions against different timescale. The program reads data from CHRONOS Chronos database and displays the results in SVG (Scalable Vector Graphic) format, which is rendered into a Java Applet Viewer. Other formats like PNG, JPEG and TIFF are also available for various usages.
  • Time Scale Creator:(see subsection above)
    Time Scale Creator
    Time Scale Creator allows the user to generate SVG based time scale images over a selected range of time and zonations.
  • Workflow:(see subsection above)
    The CHRONOS resources are available as service and data objects.  These objects are kept intentionally abstract to allow them to be placed together in various ways to form workflows.  This allows the researcher to create the connection between the various tools and data as he or she sees fit.  We are using the Kepler workflow package to test and use our objects in a workflow environment.
click image for a larger version

Electronic Visualization Lab Core Wall:
The Electronic Visualization Laboratory CoreWall effort (ref: is a tool that the CHRONOS group is looking to interconnect some of its tools and data into. The picture to the right is the EVL CoreWall system configured by CHRONOS at out our Iowa State University facilities. We are working with EVL and other CoreWall collaborators to interconnect this tool into our web and data services.

See more 3rd party tools that use CHRONOS services and results by selecting "3rd Party Tools" in the link bar above.