Hello Doreen and thank you for your email, The geologist/tephrochronologist who has worked on tephrostratigraphy in that area is Kristi Wallace. Kristi is on leave until later this week, but she will respond to your information request when she returns to the office. Her email is kwallace@usgs.gov and she is cc'd on this email. Thanks, Janet Schaefer -------- Doreen Cooper wrote: I have an archaeological site in Chignik Lake that we are preparing a final report on. Can you please give me any dates you might have on the cfe for Veniaminoff, as well as any other prehistoric eruptions that are known. Also, what is the status of the development of any tephrochronology for Veniaminoff? Would it be helpful if we go back this year to take soil samples from our ash deposits that we could then submit to AVO?? Thank you!! PS If you have the same cfe and prehistoric eruption dates for Black Peak, that would be great. I think I have the information I need on Aniakchak, but if you also have that in a handy format, that would be great. Thanks so much! Also, would there be a chance that ash from Kupreanoff could have been part of my soil layers at Chignik Lake? If so, perhaps the dates for it also?