The Tiburon Peninsula is a landform of the San Francisco Bay Area

San Francisco Bay Area

The San Francisco Bay Area, commonly known as the Bay Area, is a populated region that surrounds the San Francisco and San Pablo estuaries in Northern California. The region encompasses metropolitan areas of San Francisco, Oakland, and San Jose, along with smaller urban and rural areas...

's Marin County

Marin County, California

Marin County is a county located in the North San Francisco Bay Area of the U.S. state of California, across the Golden Gate Bridge from San Francisco. As of 2010, the population was 252,409. The county seat is San Rafael and the largest employer is the county government. Marin County is well...

 and incorporates the communities of Tiburon

Tiburon, California

Tiburon is an incorporated town in Marin County, California. It occupies most of the Tiburon Peninsula, which reaches south into the San Francisco Bay. The smaller city of Belvedere occupies the south-east part of the peninsula and is contiguous with Tiburon...

 and Belvedere, California

Belvedere, California

Belvedere is an affluent city in Marin County, California, United States. Belvedere is located northeast of Sausalito, at an elevation of 36 feet...

  Much of the land area of the Tiburon Peninsula was part of a Spanish land grant originally given to the early Californian John Reed

John Reed (Early Californian)

John Thomas Reed was an early California European settler who was the grantee of Rancho Corte Madera del Presidio in what is present day Marin County, California.-Life:Reed went to Acapulco, Mexico in 1820...

. A prominent feature of the Tiburon Peninsula is Ring Mountain, Marin County, which forms the backbone of the peninsula and is the highest elevation of the peninsula. The Tiburon Peninsula is the locus of a number of rare

Rare species

A rare species is a group of organisms that are very uncommon or scarce. This designation may be applied to either a plant or animal taxon, and may be distinct from the term "endangered" or "threatened species" but not "extinct"....

 and endangered flora species, and is also the site of ancient Native American

Native Americans in the United States

Native Americans in the United States are the indigenous peoples in North America within the boundaries of the present-day continental United States, parts of Alaska, and the island state of Hawaii. They are composed of numerous, distinct tribes, states, and ethnic groups, many of which survive as...

 rock carvings. The mineral lawsonite

Lawsonite

Lawsonite is a hydrous calcium aluminium sorosilicate mineral with formula CaAl2Si2O72·H2O. Lawsonite crystallizes in the orthorhombic system in prismatic, often tabular crystals. Crystal twinning is common. It forms transparent to translucent colorless, white, and bluish to pinkish grey glassy to...

was first described from an occurrence on the Tiburon Peninsula.