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Bodega Head is a small promontory on the
Pacific The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean (or, depending on definition, to Antarctica) in the south, and is bounded by the contine ...
coast of northern
California California is a state in the Western United States, located along the Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the most populous U.S. state and the 3rd largest by area. It is also the m ...
in the
United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territori ...
. It is located in
Sonoma County Sonoma County () is a county located in the U.S. state of California. As of the 2020 United States Census, its population was 488,863. Its county seat and largest city is Santa Rosa. It is to the north of Marin County and the south of Mendocino ...
at , approximately northwest of
San Francisco San Francisco (; Spanish for " Saint Francis"), officially the City and County of San Francisco, is the commercial, financial, and cultural center of Northern California. The city proper is the fourth most populous in California and 17th ...
and approximately west of
Santa Rosa Santa Rosa is the Italian, Portuguese and Spanish name for Saint Rose. Santa Rosa may also refer to: Places Argentina *Santa Rosa, Mendoza, a city * Santa Rosa, Tinogasta, Catamarca * Santa Rosa, Valle Viejo, Catamarca * Santa Rosa, La Pampa * S ...
. The peninsula, which is approximately long and wide, emerges from the coast to the south. It shelters the shallow, sandy Bodega Bay and the inner portion known as
Bodega Harbor Bodega Harbor is a small, shallow, natural harbor on the Pacific coast of northern California in the United States, approximately northwest of San Francisco. The harbor is approximately in area. The harbor is in Sonoma County at , on the eastern ...
.
Sonoma Coast State Beach Sonoma Coast State Park is a State of California property in Sonoma County consisting of public access use on lands adjoining the Pacific Ocean. This extent of beach runs from a coastal point about north of Jenner and continues for approximatel ...
comprises beaches and dunes along the south side of the promontory. The
University of California, Davis The University of California, Davis (UC Davis, UCD, or Davis) is a public land-grant research university near Davis, California. Named a Public Ivy, it is the northernmost of the ten campuses of the University of California system. The inst ...
runs an ongoing marine biology program at the Bodega Marine Laboratory. The laboratory is located on the grounds of Bodega Marine Reserve, which is part of the UC Natural Reserve System. The peninsula is considered a prime spot to observe the migration of
whale Whales are a widely distributed and diverse group of fully aquatic placental marine mammals. As an informal and colloquial grouping, they correspond to large members of the infraorder Cetacea, i.e. all cetaceans apart from dolphins and ...
s. It is also one of the three points of the Red Triangle, a major feeding ground for
great white sharks The great white shark (''Carcharodon carcharias''), also known as the white shark, white pointer, or simply great white, is a species of large Lamniformes, mackerel shark which can be found in the coastal surface waters of all the major ocean ...
. A series of trails are a popular destination for recreational
hiking Hiking is a long, vigorous walk, usually on trails or footpaths in the countryside. Walking for pleasure developed in Europe during the eighteenth century.AMATO, JOSEPH A. "Mind over Foot: Romantic Walking and Rambling." In ''On Foot: A Histor ...
. Bodega Head State Marine Reserve & Bodega Head State Marine Conservation Area protect area waters. Like underwater parks, these marine protected areas help conserve ocean wildlife and marine ecosystems. The peninsula was probably inhabited by the
Coast Miwok Coast Miwok are an indigenous people that was the second-largest group of Miwok people. Coast Miwok inhabited the general area of modern Marin County and southern Sonoma County in Northern California, from the Golden Gate north to Duncans Poi ...
people before the arrival of
Europe Europe is a large peninsula conventionally considered a continent in its own right because of its great physical size and the weight of its history and traditions. Europe is also considered a subcontinent of Eurasia and it is located entirel ...
ans. Campbell Cove, on the east side of the promontory, is a candidate for Sir Francis Drake's 1579 landing site.


Geology

Bodega Head lies just on the west side of the
San Andreas Fault The San Andreas Fault is a continental transform fault that extends roughly through California. It forms the tectonic boundary between the Pacific Plate and the North American Plate, and its motion is right-lateral strike-slip (horizonta ...
, which runs between the base of the promontory and the mainland. During the 1906 San Francisco earthquake, the promontory shifted approximately , displacing the harbor to the north relative to the mainland.
Geologically Geology () is a branch of natural science concerned with Earth and other astronomical objects, the features or rocks of which it is composed, and the processes by which they change over time. Modern geology significantly overlaps all other E ...
, the rocks of Bodega Head differ greatly from those on the mainland just to the east. Whereas the rocks of Bodega Head are exposed continental
granite Granite () is a coarse-grained ( phaneritic) intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slowly cools and solidifies under ...
, the mainland rocks are of oceanic origin from the
Franciscan Complex The Franciscan Complex or Franciscan Assemblage is a geologic term for a late Mesozoic terrane of heterogeneous rocks found throughout the California Coast Ranges, and particularly on the San Francisco Peninsula. It was named by geologist Andrew ...
. Bodega Head is the northern tip of a vast geologic province known as the
Salinian Block The Salinian Block or Salinian terrane is a geologic terrane which lies west of the main trace of the San Andreas Fault system in California. It is bounded on the south by the Big Pine Fault in Ventura County and on the west by the Nacimiento Fau ...
whose core is of the same origins as the core of the Sierra Nevada Mountains. The block was torn off the continent as the San Andreas Fault came into existence about 20 million years ago, and was transported northward hundreds of miles. Other nearby examples of the Salinian Block are the
Point Reyes Peninsula Point Reyes (, meaning "Point of the Kings") is a prominent cape and popular Northern California tourist destination on the Pacific coast. Located in Marin County, it is approximately west-northwest of San Francisco. The term is often applied t ...
and the Farallon Islands. A controversial attempt by Pacific Gas & Electric Company to construct a nuclear power plant on the peninsula was thwarted in 1964 due to environmental concerns and the susceptibility of the site to
earthquake An earthquake (also known as a quake, tremor or temblor) is the shaking of the surface of the Earth resulting from a sudden release of energy in the Earth's lithosphere that creates seismic waves. Earthquakes can range in intensity, fr ...
s.


See also

*
Point Reyes Point Reyes (, meaning "Point of the Kings") is a prominent cape and popular Northern California tourist destination on the Pacific coast. Located in Marin County, it is approximately west-northwest of San Francisco. The term is often appli ...


References


External links

{{Commons category, Bodega Head
P.G. & E. Controversy in the 1950s
Headlands of California Landforms of Sonoma County, California Bodega Bay