Shutter ridge

A shutter ridge is a ridge which has moved along a fault line, blocking or diverting drainage. Typically, a shutter ridge creates a valley corresponding to the alignment of the fault that produces it.[1] Shutter ridges occur exclusively at strike-slip faults.

Example Locations

References

  1. ^ Glossary, Earthquake Hazards Program, USGS Archived 2014-09-29 at the Wayback Machine
  2. ^ Easterbrook, Don J. (1999). Surface processes and landforms (2. ed.). Upper Saddle River, NJ: Prentice Hall. ISBN 0-13-860958-6.
California State Route 13

State Route 13 (SR 13) is a state highway in the U.S. state of California. It runs entirely in Alameda County, connecting Interstate 580 in Oakland to Interstate 80/Interstate 580 in Berkeley.

It consists of three contiguous segments: the Warren Freeway from I-580 to State Route 24 in Oakland; Tunnel Road, a narrow two-lane road to Claremont Avenue in Berkeley; and Ashby Avenue, a main east–west street through south Berkeley to I-80/I-580.

Oakland Hills, Oakland, California

Oakland Hills is an informal term used to indicate the city neighborhoods lying within the eastern portion of Oakland, California. The northernmost neighborhoods were devastated by the Oakland firestorm of 1991.

Ridge

A ridge or a mountain ridge is a geographical feature consisting of a chain of mountains or hills that form a continuous elevated crest for some distance. The sides of the ridge slope away from narrow top on either side. The lines along the crest formed by the highest points, with the terrain dropping down on either sides, are called the ridgelines. Ridges are usually termed hills or mountains as well, depending on size.

Rockridge, Oakland, California

Rockridge is a residential neighborhood and commercial district in Oakland, California. Rockridge is generally defined as the area east of Telegraph Avenue, south of the Berkeley city limits, west of the Oakland hills and north of the intersection of Pleasant Valley Avenue/51st Street and Broadway. Rockridge was listed by Money Magazine in 2002 as one of the "best places to live".It lies at an elevation of 187 feet (57 m). Some residential portions of the neighborhood consist mainly of relatively large homes built between the 1920s and the 1950s, although some homes date even earlier to 1909–1912. Other portions of the neighborhood consist of small bungalows and cottages. In other sections, multi-family apartment buildings add density which supports nearby transit and retail. It is also home to Claremont Country Club.

Sausal Creek (Alameda County)

Sausal Creek, 3.1 miles (5.0 km) long, is one of the principal creeks in Oakland, California.

The creek derives its name from the Spanish word for willow grove (sausal). Native arroyo willows were once common along its banks. Efforts are underway to restore the willows and the creek itself. A volunteer group, Friends of Sausal Creek, helps remove invasive species and plant native species. Some of the invasive species in the Sausal Creek watershed include Monterey pine trees, ivy, French broom, and wild mustard. The friends run workdays at the Scout Hut in Dimond Park on Saturdays throughout the year.

Temescal Creek (Northern California)

Temescal Creek is one of the principal watercourses in the city of Oakland, California, United States.

The word "temescal" derives from the word temescalli, which means "sweat house" in the Nahuatl language of the Mexica ("Aztec") people of Mexico. The name was given to the creek when it became part of the Peralta's Rancho San Antonio. It is surmised that the Peraltas or perhaps one of their ranch hands (vaqueros) had seen local indigenous (Ohlone) structures along the creek similar to those in other parts of New Spain which were called temescalli.

Two forks begin in the Berkeley Hills in the northeastern section of Oakland (also referred to as the Oakland Hills), part of the Pacific Coast Ranges, coming together in the Temescal district of Oakland, then flowing westerly across Oakland and Emeryville to San Francisco Bay.

The north fork of Temescal Creek was renamed "Harwood's Creek" in the mid 19th century after an early claimant to grazing lands in the canyon above the Claremont neighborhood, retired sea captain and Oakland wharfinger William Harwood. It was renamed yet again "Claremont Creek" in the early 20th century after a residential development in the same vicinity, today's Claremont district.

The south fork begins in the northern section of Oakland's Montclair district, flowing southwest out of a canyon in the hills, then turning abruptly northwestward in the linear valley formed by the Hayward Fault. It then flows into Lake Temescal, a natural sag pond which was dammed in the 19th century to increase its capacity for use as a reservoir. Lake Temescal is now a public park.

The creek continues out of Lake Temescal, curving westerly around the end of the shutter ridge in the Rockridge district of Oakland, then flowing almost in a line toward the Bay.

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