----------------------------Original message---------------------------- SAN FRANCISCO WALKING TOUR AT M.A.G.E.R.T. CONFERENCE STREETCAR TO SUBDUCTION WALK: TUESDAY JULY 1, 1:00-3:00 PM. A short streetcar ride start our quick tour of a few geologic exposures right in the heart of San Francisco that have resulted from spreading ocean ridges, tectonic plate movement, and subduction. These include mid-ocean ridge basalt, folded beds of radiolarian chert and the mirror-smooth face of an earthquake fault. Along the way we'll see Mint Hill (site of the "new" U.S. mint) and historic Alamo Square (with the postcard views of Victorian houses in the foreground and downtown high rises in the distance). Then we'll walk along Buena Vista Park to Corona Heights to get some nice views of the Bay Area (weather cooperating). The walk will be about 3 miles long and include an elevation gain of about 300 feet (wear comfortable shoes and dress in layers). While there is no sign-up required, if you think you will participate, please let Phil Hoehn know ([log in to unmask] or write Map Collection, Earth Sciences and Map Library, Univ. of California, Berkeley, CA 94720-6000). This will help in estimating the number of handouts needed. We'll start at the main entrance of the Moscone Convention Center (north side of Howard St., between 3rd and 4th) PROMPTLY at 1:00, or at 1:05 p.m. in the lobby of the Pickwick Hotel (5th & Mission).