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geology lovejoy basalt oroville


I spent four days knocking around the geologic attractions of California this weekend. The next 10 photos are highlights of my first day, from Oakland to the Sierra starting at Oroville and ending in Quincy.

This is the Lovejoy Basalt cropping out on the ridge, one little piece of an enormous flood basalt that arose near the Nevada border and flowed as far as Fairfield, some 150 miles away. That was around 18 million years ago, when the Sierra was a low range maybe 3,000 feet high.
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Comments on this photo:

Dec 20 2006 05:37 GMT JPHarr
Great view! I used to live in the Sunnyvale area and Milpitas while in the Air Force. Rather than hang around San Jose, I was more apt to go exploring either in the Santa Cruz mountains, or over the foothills to the east of S.J.
I fondly remember views such as this.