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Really Really Old Stuff

An old adobe inside the old Presidio Officers' Club is set to be dated by using tree rings to find out exactly when the old timber beams propping up the adobe were cut down to build the garrison. Estimates put the building at over 200 years old, but scientists from the Presidio Trust and Save the Redwoods League are going to use a climate-change study of California's ancient coastal redwoods to find out exactly. There's been argument over whether this building or the church at Mission Dolores (built between 1788 and 1791) is the oldest in the city, so looks like we'll finally solve the mystery. [SF Gate/photo: Presidio Trust]