Round Top (Contra Costa County, California)

Round Top
Round Top
	File:Round Top, Contra Costa County.jpg
Highest point
Elevation	1,764 ft (538 m) NAVD 88
Coordinates	37°51′00″N 122°11′34″W / 37.850084094°N 122.192822678°W
Geography
	Round Top is located in California Round Top Round Top Contra Costa County, California, U.S. Round Top is located in the United States Round Top Round Top Round Top (the United States)
Parent range	Diablo Range
Topo map	USGS Oakland East

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^[2] and continued for over a million years.^[3] The area has two known main volcanic vents: one under the Lawrence Berkeley National Laboratory and 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.^[2]

References

↑ ^1.0 ^1.1 "Round Top". NGS Data Sheet. National Geodetic Survey, National Oceanic and Atmospheric Administration, United States Department of Commerce. Retrieved 2009-08-16.
↑ ^2.0 ^2.1 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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[ngs-1] 1.0 ^1.1 "Round Top". NGS Data Sheet. National Geodetic Survey, National Oceanic and Atmospheric Administration, United States Department of Commerce. Retrieved 2009-08-16.

[Slack-2] 2.0 ^2.1 Slack, Gordy (April 1, 2005). "Voice of the Volcano". Bay Nature. Retrieved April 18, 2021.

[3] Rademacher, Horst (January 6, 2012). "From the Inside Out". Bay Nature. Retrieved April 19, 2021.

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v t e East Bay Regional Parks
Parks	Alvarado Park Anthony Chabot Briones Castle Rock Contra Loma Coyote Hills Crockett Hills Del Valle Diablo Foothills Dublin Hills Dry Creek Pioneer Garin Lake Chabot Pleasanton Ridge Redwood Ridgelands Sobrante Ridge Tassajara Ridge Temescal Tilden Vargas Plateau Wildcat Canyon
Shorelines	Antioch/Oakley Big Break Brooks Island Carquinez Strait Hayward Martin Luther King Jr. Miller/Knox Oyster Bay Point Isabel Point Pinole Radke Martinez
Preserves/open spaces	Bishop Ranch Black Diamond Mines Brushy Peak Claremont Canyon Five Canyons Huckleberry Leona Canyon Mission Peak Morgan Territory Sibley Round Valley Sobrante Ridge Sycamore Valley Vasco Caves Waterbird
Wilderness areas	Las Trampas Ohlone Sunol
Recreation areas	Cull Canyon Don Castro Kennedy Grove Quarry Lakes Roberts Shadow Cliffs
Trails	Alameda Creek Iron Horse
Other	Ardenwood Historic Farm Browns Island Crown Memorial State Beach Eastshore State Park Hoffman Marsh Little Hills Picnic Ranch Point Molate Beach Park Breuner Marsh (now Dotson Family Marsh)

Round Top (Contra Costa County, California)

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