Hi Nicholas - Those volcanics are way older than AVO's purview (Quaternary and younger), so if those samples still exist, you could ask the Alaska Science Center folks in Anchorage (https://www.usgs.gov/centers/asc ). I think they, like AVO, have been moving their rock collections to the State of Alaska Geologic Materials Center in Anchorage (http://dggs.alaska.gov/gmc/ and http://maps.dggs.alaska.gov/gmc/ so you might look for the samples there. Best wishes on your research, Cheryl ----- Hi, I am a Ph.d (ABD) student at the University of Alaska Fairbanks. In 1996 scientists from USGS published geochemistry of some volcanics on Admiralty Island, Southeast Alaska (Ford, A.B., Palmer, C.A., Brew, D.A., 1996. Geochemistry of the Andesitic Admiralty Island Volcanics, An Oligocene Rift-Related Basalt to Rhyolite Volcanic Suite (No. 2152). Geologic Surveys in Alaska by the U.S. Geological Survey.) I was wondering if any samples from their survey still exist in the office? I am an archaeologist interested in doing some non-destructive p-XRF analysis of their source samples. I suspect that early archaeological sites in the region are making use of rhyolite/dacite from that particular volcanic field, and while I have geochemical data on artifacts I do not have any (comparable) data from the Admiralty source volcanics (I'd like to be able to directly compare data from source samples and artifacts collected on the same machine). I'm hoping that the samples from their work are still stored away somewhere? Ift those materials could be located and loaned to the University of Alaska Museum of the North this summer, it would save me an expensive trip to collect new samples next year!