Dr. Glenn Spinelli, Associate Professor of Geophysics at New Mexico Tech, will present the weekly Earth and Environmental Science Seminar. His topic is "Effects of Fluid Circulation in Oceanic Crust on Subduction Zone Temperatures." Hosted by Dr. Dan Cadol. Sponsored by the Earth and Environmental Science Department and the New Mexico Bureau of Geology and Mineral Resources. 4 p.m. in MSEC 101.