******************************************************************* From: H.R. Naslund <naslund@xxxxxxxxxxxxxx> ******************************************************************* Colleagues, We are looking at a “volcanic ash” in an evaporite sequence that contains fresh feldspar, biotite, and quartz, but has no glass. I think this may be the result of a phreatic eruption through an existing volcanic plug rather than an eruption of fresh magma. Does anyone know of a good reference for non-juvenile ashes in the geologic record? We wonder how widely distributed they may be and what they would look like at some distance from the source. Thanks, H.R. "Dick" Naslund Binghamton University Binghamton, NY 13902 Naslund@xxxxxxxxxxxxxx ============================================================== To unsubscribe from the volcano list, send the message: signoff volcano to: listserv@xxxxxxx, or write to: volcano-request@xxxxxxxx To contribute to the volcano list, send your message to: volcano@xxxxxxxx Please do not send attachments. ==============================================================
