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A view of the Colorado River and Grand Canyon from Toroweap Point. Could this ditch possibly have been a significant impediment for prehistoric movement from one rim to the other? Trace element studies of artifacts from sites along the North Rim suggest it was probably a fairly porous barrier. Click on the image above for a panoramic look from the summit of the cinder cone (Vulcan's Throne) in the upper right corner of the photo.

Lab News

WHAT'S NEW | MEET THE SPECTROMETERS | FREE XRF ANALYSIS

WHAT'S NEW?
2012 SUMMER SCHEDULE AT THE LAB

OUR ANNUAL LAB SUMMER SCHEDULE

Every summer from June 1st to September 1st, we're on summer schedule, may have the spectrometers down for maintenance, are often out of the lab, out in the field, or out of the country, and may be slow in turning around XRF-related projects. In the summer, however, the hydration lab remains open for business as usual and we'll continue to maintain our usual prompt turnaround schedule for hydration analysis projects.


EXPANDED ONLINE RESOURCES AT THE U. S. OBSIDIAN SOURCE CATALOG

We're now in the process of gradually expanding the obsidian source information that's available through the U. S. Obsidian Source Catalog and are systematically adding individual source literature reference lists and, to a lesser degree at first, brief source descriptions. Also please note that the individual state obsidian source maps will now be accessible directly from the state source lists. As we add this information to the lab website, we'll also be making the transition to web-based support for the source information that is now summarized in our lab reports. With this change, the obsidian source information will remain current and we'll be able to be more comprehensive in our review of the literature and our descriptions of individual sources.

Once that's finally completed, we'll begin filling out more detailed information for all the individual obsidian sources and will eventually compile the whole works into a single volume. This will take some time so please be patient!


TINKERING UNDER THE HOOD AT THE LAB WEBSITES

We've been spending time and energy lately working on the two lab websites at www.obsidianlab.com and www.sourcecatalog.com. Here's a short list on what we've recently completed, are currently working on, or are planning for the near future:

www.obsidianlab.com
  • Considerable expansion of our collection of downloadable obsidian-related articles, reports, theses, and dissertations.
  • Additional information about the theory and methods involved in the XRF and hydration analysis of artifacts.
  • More information about FGV (fine-grained volcanics) sources and analytical methods.
  • A library of obsidian-related images that you can use.
  • An updated and comprehensive list of Northwest Research and BioSystems Analysis obsidian lab reports produced since 1992.
  • Descriptive terminology for use with obsidian.
  • Updated GIS data that can be used for map production.
  • Expanded descriptions and datasets for lab research projects.
  • Geochemical datasets for obsidian sources.
  • XRF and hydration lab tour - you'll be able to see exactly what we do to your artifacts.
www.sourcecatalog.com
  • Downloadable reference lists for individual obsidian sources (Adobe Acrobat format).
  • We're gradually filling in the state lists with more detailed descriptions about the individual sources.
  • Obsidian source maps for each state. Click HERE to see how we're progressing.
  • Selected regional obsidian source maps (click HERE for a preview).
  • Canadian sources in the catalog.
  • World obsidian source catalog will be updated (through the IAOS).
  • We're also looking at Google Earth and Google Maps to see how we might best use these resources.

And finally, a modest presence on YouTube, Facebook, and Blogspot:

  • Lab and Source Blog (Obsidian and FGV source revelations, XRF details)
  • Facebook (Science meets social networking)
  • YouTube (A modest collection of mercifully-short videos)
We've also begun to adapt and test the websites so that they're as easy as possible to use with the Apple Touch, iPhone, or iPad. We've found that it can be mighty handy to have, say, a list of obsidian sources or descriptive terms available while you're on the road and we're working on making the web resources as easy to use as possible with your handy portable electronic device.

Stay tuned!

MEET THE LAB XRF SPECTROMETERS

Our ThermoNoran QuanX EC energy-dispersive X-ray fluorescence spectrometer (the direct descendant of our Spectrace 5000 instrument) is installed at the lab and we're currently testing the instrument and experimenting with some new analytical procedures.

Left - Flo, our venerable Spectrace 5000 EDXRF spectrometer. Right - Ed, our QuanX EC EDXRF spectrometer.

Above: Click on the video to see Flo do her stuff.
Below: Click on the video to see Ed get a workout.

Click on the titles at the top of the videos to view these clips and more on YouTube.

A typical spectra generated during testing by our QuanX EDXRF spectrometer.

Above: Calibration curves used by Flo to generate quantitative analyses of samples.
Yes, the software is running on an MS-DOS PC, still the most reliable OS in the lab!
FREE XRF!?
In our quest to compile as complete a reference database of obsidian sources as possible, we offer free XRF analyses of obsidian source material. Click HERE for more information. We are also interested in the collaborative research of obsidian sources or artifacts and are involved in several ongoing projects ranging from the Oregon Coast to the Philippines. Check the RESEARCH page to see what we're up to.

Back to the Obsidian Lab Home Page

Last Updated: 01/01/2012
Northwest Research Obsidian Studies Laboratory