|Adjacent bodies of water||Pacific Ocean|
Seal Rock (or Seal Rocks) is a group of small rock formation islands in the Lands End area of the Outer Richmond District in western San Francisco, California. They are located just offshore in the Pacific Ocean, at the north end of the Ocean Beach, near the Cliff House and Sutro Baths ruins.
The name is derived from the population of Steller's sea lions (Eumetopias jubatus) and California sea lions (Zalophus californianus), who haul out on the rock. Both species are often colloquially called "seals". The formations and wildlife are protected within the Golden Gate National Recreation Area.
Near the end of the last ice age, this part of the coastline was thought to be between eight and twenty five miles westward of its current position - around five thousand years ago, with the melting of the ice, the sea level rose to its current level.
The coastal features found here today were formed by the actions of waves, wind, and the movement of sand. The geology of this part of the coastline of San Francisco consists of steep rocky cliffs which are punctuated by narrow sandy pocket beaches found at the north end of the city and long sandy stretches at Ocean Beach and Fort Funston to the south. The local features, and indeed the entire San Francisco Peninsula, come from the northern aspect of the Santa Cruz Mountains. Before the urban development seen today, the area landward of Ocean Beach consisted of barren sand fields inland to Twin Peaks. The first known map of the area, dating from 1852, was made by the U.S. Coast and Geodetic Survey and describes the coastline here as being entirely unaltered by humans.
The geologic layers beneath Ocean Beach, starting from the top (i.e. the youngest), are:
The Colma and Merced Formations consist generally of poorly-sorted sandy deposits, probably deposited during some earlier period of greater sea levels. The Colma Formation is found under the dune sands and also extends inland.
Coastal erosion is the loss or displacement of land, or the long-term removal of sediment and rocks along the coastline due to the action of waves, currents, tides, wind-driven water, waterborne ice, or other impacts of storms. The landward retreat of the shoreline can be measured and described over a temporal scale of tides, seasons, and other short-term cyclic processes. Coastal erosion may be caused by hydraulic action, abrasion, impact and corrosion by wind and water, and other forces, natural or unnatural.
The Sunset District is an neighborhood located in the west-central area of San Francisco, California, United States.
The Sutro Baths was a large, privately owned public saltwater swimming pool complex in the Lands End area of the Outer Richmond District in western San Francisco, California.
Ocean Beach is a beach on the west coast of San Francisco, California, United States, bordering the Pacific Ocean. It is adjacent to Golden Gate Park, the Richmond District, and the Sunset District. The Great Highway runs alongside the beach, and the Cliff House and the site of the former Sutro Baths sit at the northern end. The beach is a part of the Golden Gate National Recreation Area, which is administered by the National Park Service.
Half Moon Bay State Beach is a 4-mile (6 km) stretch of protected beaches in the state park system of California, United States, on Half Moon Bay. From north to south it comprises Roosevelt, Dunes, Venice, and Francis Beaches. The 181-acre (73 ha) park was established in 1956.
The Cliff House is a neo-classical style building perched on the headland above the cliffs just north of Ocean Beach, in the Outer Richmond neighborhood of San Francisco, California. The building overlooks the site of the Sutro Baths ruins, Seal Rocks, and is part of the Golden Gate National Recreation Area, operated by the National Park Service (NPS). The Cliff House is owned by the NPS; the building's terrace hosts a room-sized camera obscura.
The Golden Gate National Recreation Area (GGNRA) is a U.S. National Recreation Area protecting 82,027 acres (33,195 ha) of ecologically and historically significant landscapes surrounding the San Francisco Bay Area. Much of the park is land formerly used by the United States Army. GGNRA is managed by the National Park Service and is the most visited unit of the National Park system in the United States, with more than 15 million visitors a year. It is also one of the largest urban parks in the world, with a size two-and-a-half times that of the consolidated city and county of San Francisco.
Sutro Heights Park is an historic public park in the Outer Richmond District of western San Francisco, California. It is within the Golden Gate National Recreation Area and the Sutro Historic District.
Mussel Rock is a rock formation on the coast of San Mateo County, California, offshore from Daly City. It consists of one large and numerous smaller rocks of a type known as a stack, where a headland is eroded unevenly, leaving small islands. The rock itself is located 15 meters from the shore of Mussel Rock Park and stands 18 meters tall.
Salt Point State Park is a state park in Sonoma County, California, United States. The park covers 6,000 acres (2,428 ha) on the coast of Northern California, with 20 miles (32 km) of hiking trails and over 6 miles (9.7 km) of a rough rocky coast line including Salt Point which protrudes into the Pacific Ocean. The park also features the first underwater preserves in California. The constant impact of the waves forms the rocks into many different shapes. These rocks continue underwater providing a wide variety of habitats for marine organisms. The activities at Salt Point include hiking, camping, fishing, scuba diving and many others. The weather is cool with fog and cold winds, even during the summer.
The Serra Fault is the northernmost fault in a zone of northwest-striking range front thrust faults adjacent to and northeast of the San Francisco Peninsula segment of the San Andreas Fault, in eastern San Mateo County, California.
Fort Funston is a former harbor defense installation located in the southwestern corner of San Francisco. Formerly known as the Lake Merced Military Reservation, the fort is now a protected area within the Golden Gate National Recreation Area (GGNRA). It was named in honor of Frederick N. Funston (1865–1917), a Major General in the United States Army with strong connections to San Francisco, and included several artillery batteries. The fort is located on Skyline Boulevard at John Muir Drive, west of Lake Merced.
Carville, also known Carville-by-the-Sea, was an impromptu neighborhood in the late 19th and early 20th centuries in what is now the Outer Sunset District of San Francisco, California. Residents reused abandoned horsecars and, later, cable cars for housing and public buildings. Carville was located near the intersection of 47th Ave. and Lawton Streets, just south of the western end of Golden Gate Park.
The Camera Obscura is a large-scale camera obscura, in the Lands End area of the Outer Richmond District in western San Francisco, California.
The Sutro Historic District is a National Park Service historic district in the Lands End area of the Outer Richmond District in western San Francisco, California. It is within the Golden Gate National Recreation Area, since being acquired by the National Park Service in 1977.
Lands End is a park in San Francisco within the Golden Gate National Recreation Area. It is a rocky and windswept shoreline at the mouth of the Golden Gate, situated between the Sutro District and Lincoln Park and abutting Fort Miley Military Reservation. A memorial to USS San Francisco stands in the park. Numerous hiking trails follow the former railbeds of the Ferries and Cliff House Railway along the cliffs and also down to the shore.
Cape Town lies at the south-western corner of the continent of Africa. It is bounded to the south and west by the Atlantic Ocean, and to the north and east by various other municipalities in the Western Cape province of South Africa.
Rancho Corral de Tierra was a 7,766-acre (31.43 km2) Mexican land grant in present-day coastal western San Mateo County, northern California.
The Merced Formation is a geologic formation in California, and also in Oregon and Washington state. It is named for Lake Merced, a natural lake on the western San Francisco coastline.