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On the north half of the hogbacks, by foliated biotite-hornblende tonalite and on the southern half by hornblende gabbro. The basalt is potassium-argon dated to 10.4 to 10.8 million years and is a remnant of a channel-filling basalt flow, overlying a thin deposit of unconsolidated gray stream gravel, indicating that the basalt had filled in a ...
Because of the steeply dipping nature of the strata that forms a hogback, a slight shift in location may take place as the landscape is lowered by erosion, but it will be a matter of feet rather than miles, as might happen with cuestas. [3] [5] All gradations occur between hogbacks, homoclinal ridges, and cuestas. The differences between these ...
As part of the California Floristic Province, the Temescal Mountains host a diverse array of plant species within distinctive natural (plant) communities, including coastal sage scrub, chaparral, riparian woodland, southern oak woodland, rocky outcrop and valley grassland.
This is a list of named summits in the nine-county San Francisco Bay Area that are more than 1,000 feet (305 m) above sea level. Note that there are no natural features above 1,000 feet (305 m) in the city of San Francisco. Unless otherwise referenced, all data are from the Geographic Names Information System (GNIS). GNIS elevations are imprecise.
This is a list of regions of California, organized by location. Northern California Central California ... San Francisco Bay Area. East Bay. Oakland–Alameda County ...
“Right as you reach the end of February and the rain starts to taper off, that’s when we get the biggest bloom,” said Ryan Forbes, interpreter for California State Parks’ Bay Area District.
L.A. fire maps show Palisades, Eaton and more fires in California right now Emily Mae Czachor, John Kelly, Taylor Johnston, Grace Manthey Updated January 22, 2025 at 5:07 PM
Robert Sibley Volcanic Regional Preserve is located in the Oakland Hills of the East Bay region of the San Francisco Bay Area, California. [1] The park is part of the East Bay Regional Parks District (EBRPD), covers 928 acres (3.76 km 2), and lies east of Oakland, partly in Alameda County and partly in Contra Costa County.