1.
California
–
California is the most populous state in the United States and the third most extensive by area. Located on the western coast of the U. S, California is bordered by the other U. S. states of Oregon, Nevada, and Arizona and shares an international border with the Mexican state of Baja California. Los Angeles is Californias most populous city, and the second largest after New York City. The Los Angeles Area and the San Francisco Bay Area are the nations second- and fifth-most populous urban regions, California also has the nations most populous county, Los Angeles County, and its largest county by area, San Bernardino County. The Central Valley, an agricultural area, dominates the states center. What is now California was first settled by various Native American tribes before being explored by a number of European expeditions during the 16th and 17th centuries, the Spanish Empire then claimed it as part of Alta California in their New Spain colony. The area became a part of Mexico in 1821 following its war for independence. The western portion of Alta California then was organized as the State of California, the California Gold Rush starting in 1848 led to dramatic social and demographic changes, with large-scale emigration from the east and abroad with an accompanying economic boom. If it were a country, California would be the 6th largest economy in the world, fifty-eight percent of the states economy is centered on finance, government, real estate services, technology, and professional, scientific and technical business services. Although it accounts for only 1.5 percent of the states economy, the story of Calafia is recorded in a 1510 work The Adventures of Esplandián, written as a sequel to Amadis de Gaula by Spanish adventure writer Garci Rodríguez de Montalvo. The kingdom of Queen Calafia, according to Montalvo, was said to be a land inhabited by griffins and other strange beasts. This conventional wisdom that California was an island, with maps drawn to reflect this belief, shortened forms of the states name include CA, Cal. Calif. and US-CA. Settled by successive waves of arrivals during the last 10,000 years, various estimates of the native population range from 100,000 to 300,000. The Indigenous peoples of California included more than 70 distinct groups of Native Americans, ranging from large, settled populations living on the coast to groups in the interior. California groups also were diverse in their organization with bands, tribes, villages. Trade, intermarriage and military alliances fostered many social and economic relationships among the diverse groups, the first European effort to explore the coast as far north as the Russian River was a Spanish sailing expedition, led by Portuguese captain Juan Rodríguez Cabrillo, in 1542. Some 37 years later English explorer Francis Drake also explored and claimed a portion of the California coast in 1579. Spanish traders made unintended visits with the Manila galleons on their trips from the Philippines beginning in 1565
2.
San Francisco Bay
–
San Francisco Bay is a shallow estuary in the U. S. state of California. It is surrounded by a region known as the San Francisco Bay Area, dominated by the large cities San Francisco, Oakland. San Francisco Bay drains water from approximately 40 percent of California and it then connects to the Pacific Ocean via the Golden Gate strait. However, this group of interconnected bays is often called the San Francisco Bay. The bay was designated a Ramsar Wetland of International Importance on February 2,2013, the bay covers somewhere between 400 and 1,600 square miles, depending on which sub-bays, estuaries, wetlands, and so on are included in the measurement. The main part of the bay measures 3 to 12 miles wide east-to-west and it is the largest Pacific estuary in the Americas. Later, wetlands and inlets were filled in, reducing the Bays size since the mid-19th century by as much as one third. Recently, large areas of wetlands have been restored, further confusing the issue of the Bays size, despite its value as a waterway and harbor, many thousands of acres of marshy wetlands at the edges of the bay were, for many years, considered wasted space. As a result, soil excavated for building projects or dredged from channels was often dumped onto the wetlands, from the mid-19th century through the late 20th century, more than a third of the original bay was filled and often built on. The idea was, and remains, controversial, there are five large islands in San Francisco Bay. Alameda, the largest island, was created when a shipping lane was cut in 1901 and it is now predominantly a bedroom community. Angel Island was known as Ellis Island West because it served as the point for immigrants from East Asia. It is now a park accessible by ferry. Mountainous Yerba Buena Island is pierced by a tunnel linking the east and west spans of the San Francisco–Oakland Bay Bridge, attached to the north is the artificial and flat Treasure Island, site of the 1939 Golden Gate International Exposition. From the Second World War until the 1990s, both served as military bases and are now being redeveloped. Isolated in the center of the Bay is Alcatraz, the site of the federal penitentiary. The federal prison on Alcatraz Island no longer functions, but the complex is a popular tourist site, despite its name, Mare Island in the northern part of the bay is a peninsula rather than an island. During the last ice age, the now filled by the bay was a large linear valley with small hills
3.
Richmond, California
–
Richmond is a city in western Contra Costa County, California, United States. The city was incorporated on August 7,1905, under the McLaughlin Administration, Richmond was the largest city in the United States served by a Green Party mayor. As of the 2010 U. S. Census, the population is at 103,710. The largest, Richmond, Virginia, is the namesake of the California city, the Ohlone Indians were the first inhabitants of the Richmond area, settling an estimated 5,000 years ago. The name Richmond appears to predate actual incorporation by more than fifty years, the Atchison, Topeka and Santa Fe Railroad had its terminus at Richmond. The first post office opened in 1900, Richmond was founded and incorporated in 1905, carved out of Rancho San Pablo, from which the nearby town of San Pablo inherited its name. Until the enactment of prohibition in 1919, the city had the largest winery in the world, in the 1920s the Ku Klux Klan was active in the city. In 1930 the Ford Motor Company opened a plant called Richmond Assembly Plant which moved to Milpitas in the 1960s. The old Ford plant has been a National Historic Place since 1988, the city was a small town at that time, until the onset of World War II which brought on a rush of migrants and a boom in the industrial sector. Standard Oil set up here in 1901, including a what is now the Chevron Richmond Refinery and tank farm. There is a pier into San Francisco Bay south of Point Molate for oil tankers, the western terminus of the Santa Fe Railroad was established in Richmond with ferry connections at Ferry Point in the Brickyard Cove area of Point Richmond to San Francisco. Many of these lived in specially constructed houses scattered throughout the San Francisco Bay Area, including Richmond, Berkeley. A specially built rail line, the Shipyard Railway, transported workers to the shipyards, kaisers Richmond shipyards built 747 Victory and Liberty ships for the war effort, more than any other site in the U. S. The city broke many records and even built one Liberty ship in a five days. On average the yards could build a ship in thirty days, the medical system established for the shipyard workers at the Richmond Field Hospital eventually became todays Kaiser Permanente HMO. It remained in operation until 1993 when it was replaced by the modern Richmond Medical Center hospital, Point Richmond was originally the commercial hub of the city, but a new downtown arose in the center of the city. It was populated by many department stores such as Kress, J. C. Penney, Sears, Macys, during the war the population increased dramatically and peaked at around 120,000 by the end of the war. Once the war ended the workers were no longer needed
4.
San Francisco
–
San Francisco, officially the City and County of San Francisco, is the cultural, commercial, and financial center of Northern California. It is the birthplace of the United Nations, the California Gold Rush of 1849 brought rapid growth, making it the largest city on the West Coast at the time. San Francisco became a consolidated city-county in 1856, after three-quarters of the city was destroyed by the 1906 earthquake and fire, San Francisco was quickly rebuilt, hosting the Panama-Pacific International Exposition nine years later. In World War II, San Francisco was a port of embarkation for service members shipping out to the Pacific Theater. Politically, the city votes strongly along liberal Democratic Party lines, San Francisco is also the headquarters of five major banking institutions and various other companies such as Levi Strauss & Co. Dolby, Airbnb, Weebly, Pacific Gas and Electric Company, Yelp, Pinterest, Twitter, Uber, Lyft, Mozilla, Wikimedia Foundation, as of 2016, San Francisco is ranked high on world liveability rankings. The earliest archaeological evidence of habitation of the territory of the city of San Francisco dates to 3000 BC. Upon independence from Spain in 1821, the became part of Mexico. Under Mexican rule, the system gradually ended, and its lands became privatized. In 1835, Englishman William Richardson erected the first independent homestead, together with Alcalde Francisco de Haro, he laid out a street plan for the expanded settlement, and the town, named Yerba Buena, began to attract American settlers. Commodore John D. Sloat claimed California for the United States on July 7,1846, during the Mexican–American War, montgomery arrived to claim Yerba Buena two days later. Yerba Buena was renamed San Francisco on January 30 of the next year, despite its attractive location as a port and naval base, San Francisco was still a small settlement with inhospitable geography. The California Gold Rush brought a flood of treasure seekers, with their sourdough bread in tow, prospectors accumulated in San Francisco over rival Benicia, raising the population from 1,000 in 1848 to 25,000 by December 1849. The promise of fabulous riches was so strong that crews on arriving vessels deserted and rushed off to the gold fields, leaving behind a forest of masts in San Francisco harbor. Some of these approximately 500 abandoned ships were used at times as storeships, saloons and hotels, many were left to rot, by 1851 the harbor was extended out into the bay by wharves while buildings were erected on piles among the ships. By 1870 Yerba Buena Cove had been filled to create new land, buried ships are occasionally exposed when foundations are dug for new buildings. California was quickly granted statehood in 1850 and the U. S. military built Fort Point at the Golden Gate, silver discoveries, including the Comstock Lode in Nevada in 1859, further drove rapid population growth. With hordes of fortune seekers streaming through the city, lawlessness was common, and the Barbary Coast section of town gained notoriety as a haven for criminals, prostitution, entrepreneurs sought to capitalize on the wealth generated by the Gold Rush
5.
California Historical Landmark
–
California Historical Landmarks are buildings, structures, sites, or places in the state of California that have been determined to have statewide historical landmark significance. Historical significance is determined by meeting at least one of the criteria listed below, The first, last, only, associated with an individual or group having a profound influence on the history of California. California Historical Landmarks of #770 and above are listed in the California Register of Historical Resources. By contrast, a site, building, feature, or event that is of local significance may be designated as a California Point of Historical Interest. List of California Historical Landmarks by county National Historic Sites National Register of Historic Places listings in California — with links to list articles by county, los Angeles Historic-Cultural Monuments San Francisco Designated Landmarks Johnson, Marael. A Guide to California Roadside Historical Markers, official OHP—California Office of Historic Preservation website OHP, California Historical Sites searchpage — links to lists by county
6.
Hiking
–
Hiking is the preferred term, in Canada and the United States, for a long, vigorous walk, usually on trails, in the countryside, while the word walking is used for shorter, particularly urban walks. On the other hand, in the United Kingdom, and the Republic of Ireland, the word hiking is also often used in the UK, along with rambling, hillwalking, and fell walking. The term bushwalking is endemic to Australia, having been adopted by the Sydney Bush Walkers club in 1927, in New Zealand a long, vigorous walk or hike is called tramping. It is an activity with numerous hiking organizations worldwide. In the United States, Canada, the Republic of Ireland, a day hike refers to a hike that can be completed in a single day. However, in the United Kingdom, the walking is also used, as well as rambling. In Northern England, Including the Lake District and Yorkshire Dales, fellwalking describes hill or mountain walks, hiking sometimes involves bushwhacking and is sometimes referred to as such. This specifically refers to walking through dense forest, undergrowth, or bushes. In extreme cases of bushwhacking, where the vegetation is so dense that human passage is impeded, the Australian term bushwalking refers to both on and off-trail hiking. Common terms for hiking used by New Zealanders are tramping, walking or bushwalking, trekking is the preferred word used to describe multi-day hiking in the mountainous regions of India, Pakistan, Nepal, North America, South America, Iran and in the highlands of East Africa. Hiking a long-distance trail from end-to-end is also referred to as trekking, in North America, multi-day hikes, usually with camping, are referred to as backpacking. The idea of taking a walk in the countryside for pleasure developed in the 18th-century, in earlier times walking generally indicated poverty and was also associated with vagrancy. Thomas West, an English priest, popularized the idea of walking for pleasure in his guide to the Lake District of 1778. To this end he included various stations or viewpoints around the lakes, published in 1778 the book was a major success. Another famous early exponent of walking for pleasure, was the English poet William Wordsworth, in 1790 he embarked on an extended tour of France, Switzerland, and Germany, a journey subsequently recorded in his long autobiographical poem The Prelude. His famous poem Tintern Abbey was inspired by a visit to the Wye Valley made during a tour of Wales in 1798 with his sister Dorothy Wordsworth. Wordsworths friend Coleridge was another keen walker and in the autumn of 1799, he and Wordsworth undertook a three weeks tour of the Lake District. John Keats, who belonged to the generation of Romantic poets began, in June 1818, a walking tour of Scotland, Ireland
7.
Cycling
–
Cycling, also called bicycling or biking, is the use of bicycles for transport, recreation, exercise or sport. Persons engaged in cycling are referred to as cyclists, bikers, or less commonly, apart from two-wheeled bicycles, cycling also includes the riding of unicycles, tricycles, quadracycles, recumbent and similar human-powered vehicles. Bicycles were introduced in the 19th century and now approximately one billion worldwide. They are the means of transportation in many parts of the world. Cycling is widely regarded as an effective and efficient mode of transportation optimal for short to moderate distances. Cycling also offers a reduced consumption of fuels, less air or noise pollution. These lead to financial cost to the user as well as to society at large. By fitting bicycle racks on the front of buses, transit agencies can significantly increase the areas they can serve, in many countries, the most commonly used vehicle for road transport is a utility bicycle. These have frames with relaxed geometry, protecting the rider from shocks of the road, utility bicycles tend to be equipped with accessories such as mudguards, pannier racks and lights, which extends their usefulness on a daily basis. As the bicycle is so effective as a means of various companies have developed methods of carrying anything from the weekly shop to children on bicycles. Certain countries rely heavily on bicycles and their culture has developed around the bicycle as a form of transport. In Europe, Denmark and the Netherlands have the most bicycles per capita, road bikes tend to have a more upright shape and a shorter wheelbase, which make the bike more mobile but harder to ride slowly. The design, coupled with low or dropped handlebars, requires the rider to bend forward more, making use of stronger muscles, the price of a new bicycle can range from US$50 to more than US$20,000, depending on quality, type and weight. However, UCI regulations stipulate a legal race bike cannot weigh less than 6.8 kg, being measured for a bike and taking it for a test ride are recommended before buying. The drivetrain components of the bike should also be considered, a middle grade dérailleur is sufficient for a beginner, although many utility bikes are equipped with hub gears. If the rider plans a significant amount of hillclimbing a triple-chainrings crankset gear system may be preferred, otherwise, the relatively lighter and less expensive double chainring may be better. Much simpler fixed wheel bikes are also available, many road bikes, along with mountain bikes, include clipless pedals to which special shoes attach, via a cleat, enabling the rider to pull on the pedals as well as push. For basic maintenance and repairs cyclists can carry a pump, a repair kit, a spare inner tube, and tire levers
8.
Equestrianism
–
Equestrianism, more often known as riding, horseback riding or horse riding, refers to the skill of riding, driving, steeplechasing or vaulting with horses. This broad description includes the use of horses for practical working purposes, transportation, recreational activities, artistic or cultural exercises, Horses are trained and ridden for practical working purposes such as in police work or for controlling herd animals on a ranch. They are also used in sports including, but not limited to, dressage, endurance riding, eventing, reining, show jumping, tent pegging, vaulting, polo, horse racing, driving. Some popular forms of competition are grouped together at horse shows, Horses are used for non-competitive recreational riding such as fox hunting, trail riding or hacking. There is public access to trails in almost every part of the world, many parks, ranches. Horses are also used for therapeutic purposes, both in specialized paraequestrian competition as well as non-competitive riding to improve health and emotional development. Horses are also driven in harness racing, at shows and in other types of exhibition, historical reenactment or ceremony. In some parts of the world, they are used for practical purposes such as farming. Horses continue to be used in service, in traditional ceremonies, police and volunteer mounted patrols. Riding halls enable the training of horse and rider in all weathers as well as indoor competition riding, though there is controversy over the exact date horses were domesticated and when they were first ridden, the best estimate is that horses first were ridden approximately 3500 BC. Indirect evidence suggests that horses were ridden long before they were driven, however, the most unequivocal early archaeological evidence of equines put to working use was of horses being driven. Chariot burials about 2500 BC present the most direct evidence of horses used as working animals. In ancient times chariot warfare was followed by the use of war horses as light, the horse played an important role throughout human history all over the world, both in warfare and in peaceful pursuits such as transportation, trade and agriculture. Horses lived in North America, but died out at the end of the Ice Age, Horses were brought back to North America by European explorers, beginning with the second voyage of Columbus in 1493. Humans appear to have expressed a desire to know which horse were the fastest. Gambling on horse races appears to go hand-in hand with racing and has a history as well. Thoroughbreds have the pre-eminent reputation as a breed, but other breeds also race. Under saddle, Thoroughbred horse racing is the most popular form worldwide, in the UK, it is known as flat racing and is governed by the Jockey Club in the United Kingdom
9.
Eucalyptus
–
Eucalyptus /ˌjuːkəˈlɪptəs/ LHeritier 1789 is a diverse genus of flowering trees and shrubs in the myrtle family, Myrtaceae. Members of the genus dominate the flora of Australia. There are more than 700 species of eucalyptus and most are native to Australia, one species, Eucalyptus deglupta, ranges as far north as the Philippines. Of the 15 species found outside Australia, just nine are exclusively non-Australian, species of eucalyptus are cultivated widely in the tropical and temperate world, including the Americas, Europe, Africa, the Mediterranean Basin, the Middle East, China, and the Indian subcontinent. However, the range over which many eucalypts can be planted in the zone is constrained by their limited cold tolerance. Australia is covered by 92,000,000 hectares of eucalypt forest, Eucalyptus is one of three similar genera that are commonly referred to as eucalypts, the others being Corymbia and Angophora. Many species, though by no means all, are known as gum trees because they exude copious kino from any break in the bark. The generic name is derived from the Greek words ευ well and καλύπτω to cover, Eucalyptus oil finds many uses like in aromatherapy, as a cure for joint pains. Eucalyptus trees show allelopathic effects, they release compounds which inhibit other plant species from growing nearby, on warm days, eucalyptus forests are sometimes shrouded in a smog-like mist of vaporised volatile organic compounds, the Australian Blue Mountains take their name from the haze. A mature eucalyptus may take the form of a low shrub or a large tree. The species can be divided into three main habits and four size categories, as a generalisation forest trees are single-stemmed and have a crown forming a minor proportion of the whole tree height. Woodland trees are single-stemmed, although they may branch at a distance above ground level. Many mallee trees may be so low-growing as to be considered a shrub, two other tree forms are notable in Western Australia and described using the native names mallet and marlock. The mallet is a small to medium-sized tree that does not produce lignotubers and has a long trunk. This is the habit of mature healthy specimens of Eucalyptus occidentalis, E. astringens, E. spathulata, E. gardneri, E. dielsii, E. forrestiana, E. salubris, E. clivicola. The smooth bark of mallets often has a satiny sheen and may be white, cream, grey, green, or copper. The term marlock has been used, in Forest Trees of Australia, it is defined as a small tree without lignotubers. They usually grow in more or less pure stands, clearly recognisable examples are stands of E. platypus, E. vesiculosa, and the unrelated E. stoatei
10.
Oakland, California
–
Oakland /ˈoʊklənd/ is the largest city and the county seat of Alameda County, California, United States. The city was incorporated in 1852, Oaklands territory covers what was once a mosaic of California coastal terrace prairie, oak woodland, and north coastal scrub. Its land served as a resource when its hillside oak and redwood timber were logged to build San Francisco. In the late 1860s, Oakland was selected as the terminal of the Transcontinental Railroad. Following the 1906 San Francisco earthquake, many San Francisco citizens moved to Oakland, enlarging the citys population, increasing its housing stock and it continued to grow in the 20th century with its busy port, shipyards, and a thriving automobile manufacturing industry. Oakland is known for its sustainability practices, including a top-ranking for usage of electricity from renewable resources, in addition, due to a steady influx of immigrants during the 20th century, along with thousands of African-American war-industry workers who relocated from the Deep South during the 1940s. Oakland is the most ethnically diverse city in the country. The earliest known inhabitants were the Huchiun Indians, who lived there for thousands of years, the Huchiun belonged to a linguistic grouping later called the Ohlone. In Oakland, they were concentrated around Lake Merritt and Temescal Creek, in 1772, the area that later became Oakland was claimed, with the rest of California, by Spanish settlers for the King of Spain. In the early 19th century, the Spanish crown granted the East Bay area to Luis María Peralta for his Rancho San Antonio, the grant was confirmed by the successor Mexican republic upon its independence from Spain. Upon his death in 1842, Peralta divided his land among his four sons, Most of Oakland fell within the shares given to Antonio Maria and Vicente. The portion of the parcel that is now Oakland was called encinal—Spanish for oak grove—due to the oak forest that covered the area. In 1851, three men—Horace Carpentier, Edson Adams, and Andrew Moon—began developing what is now downtown Oakland, on May 4,1852, the Town of Oakland incorporated. Two years later, on March 25,1854, Oakland re-incorporated as the City of Oakland, with Horace Carpentier elected the first mayor, the city and its environs quickly grew with the railroads, becoming a major rail terminal in the late 1860s and 1870s. In 1868, the Central Pacific constructed the Oakland Long Wharf at Oakland Point, a number of horsecar and cable car lines were constructed in Oakland during the latter half of the 19th century. The first electric streetcar set out from Oakland to Berkeley in 1891, at the time of incorporation, Oakland consisted of the territory that lay south of todays major intersection of San Pablo Avenue, Broadway, and Fourteenth Street. The city gradually annexed farmlands and settlements to the east and the north, Oaklands rise to industrial prominence, and its subsequent need for a seaport, led to the digging of a shipping and tidal channel in 1902. This resulted in the town of Alameda being made an island
11.
Mount Tamalpais
–
Mount Tamalpais is a peak in Marin County, California, United States, often considered symbolic of Marin County. Much of Mount Tamalpais is protected public lands such as Mount Tamalpais State Park, the Marin Municipal Water District watershed. Mount Tamalpais is the highest peak in the Marin Hills, which are part of the Northern California Coast Ranges, the elevation at the West Peak, its highest point, where a radar dome currently stands, is at about 2,576 feet. It stood over 2,600 feet before the summit was flattened for the dome construction. The East Peak, the second highest peak, is 2,572 feet. The mountain is visible from the city of San Francisco. The majority of the mountain is contained in protected public lands, including Mount Tamalpais State Park, Muir Woods National Monument, and it adjoins the Golden Gate National Recreation Area as well as several Marin County Open Space Preserves. This provides nearly 40 miles of publicly accessible open space. Some of the slopes of Mount Tamalpais fall within several cities and unincorporated communities of Marin County, including Mill Valley, Tamalpais-Homestead Valley, Stinson Beach. These areas are developed, consisting of mostly low-density single-family homes. In 2004 it was suggested by a team of Penn State geoscientists that a blind thrust fault, like the one caused the infamous Northridge earthquake. This idea was based on the steepness of Mount Tamalpais and of nearby Bolinas Ridge. Major Mount Tamalpais rockforms include serpentine, particularly evident in outcroppings near the summit, a number of serpentine endemic plants grow in the serpentine soils in this part of the mountain. The steep southeastern slopes of Mount Tamalpais drain to Arroyo Corte Madera del Presidio, annual precipitation around Mount Tamalpais varies greatly from around 27. 5–31.5 inches in the drier, eastern foothills to about 59 inches near the Bolinas Ridge, close to the Pacific Ocean. The same fact holds for the steep, south-facing bowl canyon that Muir Woods is located in, as in San Francisco, most of the annual precipitation falls during the winter months. During cold, wet winter storms, the mountain also regularly gets some snowfall, sometimes as much as 6 inches overnight, as observed in February 2001, March 2006, and February 2011. The region sometimes gets hit with strong Pacific storms that may topple trees, and bring hurricane-force winds to exposed, barren areas like the Bolinas Ridge and the summit of Mount Tamalpais. In contrast, the foothills, sheltered from the oceanic breezes and fog, are drier
12.
Marin Headlands
–
The entire area is part of the Golden Gate National Recreation Area. The Headlands are famous for their views of the Bay Area, the Headlands sometimes create their own clouds when moist, warm Pacific Ocean breezes are pushed into higher, colder air, causing condensation, fog, fog drip and perhaps rain. The hills also get more precipitation than at sea level, for the same reason, however, despite being relatively wet, strong gusty Pacific winds prevent dense forests from forming. The many gaps, ridges, and valleys in the increase the wind speed and periodically, during powerful winter storms. In summer, breezes can still be very gusty, when the oceanic air and these cloudy, gray, and rainy days often are interspersed with cool but extremely clear ones. As winter turns to spring, the April-to-June weather tends to be dominated by powerful winds, less rain, summer days alternate between clear and warm intervals, giving way to foggy and cool periods. September and October bring the highest average temperatures of the year, the centerpoint of the Marin Headlands skyline is the 920-foot Hawk Hill, the lookout point for the largest known flight of diurnal raptors in the Pacific states. Each autumn, from August into December, tens of thousands of hawks, kites, falcons, eagles, vultures, osprey, hawks avoid flight over water since warm thermals that provide lift are rare. Volunteers with the Golden Gate Raptor Observatory count and track this fall migration using bird-banding and radio-tracking techniques, all in cooperation with the National Park Service. The Marin Headlands are also home to black tail deer, mountain lions, bobcats, two types of fox, coyotes, wild turkeys, hares, rabbits, raccoons, river otters inhabit the freshwater lagoons and streams. Large numbers of birds also migrate through the Headlands, including brown pelicans from May through October, and grebes, egrets, and great blue herons in the spring, summer. The Headlands status as a park protects the habitat and populations of animals within just a few miles of San Francisco. The Marin Headlands are a geological formation created by the accretion of oceanic sediments onto the North American Plate from the Pacific Plate. The primary components of Headlands geology include graywacke sandstone, radiolarian chert, serpentinite, pillow basalts and these rocks began their migration over one hundred million years ago from as far south as present-day Los Angeles. The Marin Headlands were home to the Native American Coastal Miwok tribe, from the 1890s, the first military installations were built to prevent hostile ships from entering San Francisco Bay. The batteries at Kirby Cove, above Black Sands Beach, south of Rodeo Beach, the emplacements at the top of Hawk Hill were used for a radio station. During the Cold War, the gun batteries were decommissioned, radar sites were placed atop Hawk Hill and Hill 88. At several locations, shelters were built into the hillsides to protect the military personnel from the use of nuclear, biological, observation posts known as base end stations can also be found in the Headlands
