Paleo Home Research Data Education What's New Features Paleo Perspectives Site Map Mirror Sites National Climatic Data Center, Asheville, North Carolina navigation bar
Paleo Slide Set: Tree Rings: Ancient Chronicles of Environmental Change
Mounted huon pine (Lagarostrobus franklinii) core samples.
After the fieldwork is completed, the cores or cross section samples are returned to the laboratory where they are prepared for dating and measuring. Cores are first dried and then glued into wooden core mounts. Cross sections are sometimes in pieces and may need to be glued together or mounted on a sheet of wood to prevent breakage. Cores and cross sections are then sanded using progressively finer grits of sandpaper, or trimmed with razor blades, to produce a smooth surface so that the finest details of the rings are visible under the microscope. The cores shown in this slide are marked with series of dots. The set of three dots represent a century (in this case, 1900), and the single dots represent the first year in a decade.

Photo Credits:
Edward Cook
Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY: slides
Click to View Larger Image
Click on above image to enlarge.

Download a zip file
of a full resolution TIF image

Back to Slide Sets.....

Contact Us
Last Modified: 12 October 2001

Paleoclimatology Program Home Page