Round Top (Contra Costa County, California)
Round Top is an extinct volcano located in the Berkeley Hills, just east of Oakland, California, within Contra Costa County. The peak is part of the Sibley Volcanic Regional Preserve, which was originally established in 1936 as Round Top Regional Park. This park was one of the first three parks in the East Bay Regional Parks District. The park was renamed Sibley Volcanic Regional Preserve in 1958 in honor of Robert Sibley, the second president of the park district, shortly after his death in 1958.
The volcanic activity that created Round Top started around 10.2 Million years ago and continued for over a million years. The area has two known main volcanic vents: one under the Lawrence Berkeley National Laboratoryand the other at Round Top itself. Over time, the Round Top vent has tilted and fallen sideways, a testament to the geological changes that have shaped the region over millions of years.
See also
References
- ^ "Round Top". NGS Data Sheet. National Geodetic Survey, National Oceanic and Atmospheric Administration, United States Department of Commerce. Retrieved 2009-08-16.
- ^ Slack, Gordy (April 1, 2005). "Voice of the Volcano". Bay Nature. Retrieved April 18, 2021.
- ^ Rademacher, Horst (January 6, 2012). "From the Inside Out". Bay Nature. Retrieved April 19, 2021.
External links
- "Round Top". Geographic Names Information System. United States Geological Survey, United States Department of the Interior. Retrieved 2009-08-16.
- "Sibley Volcanic Regional Preserve". East Bay Regional Parks District. Retrieved 2009-08-16.
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