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From Wikipedia, the free encyclopedia

Loma Prieta Peak
Loma Prieta from the West
Highest point
Elevation3,790 ft (1,155 m) NAVD 88[1]
Prominence3,426 ft (1,044 m) NGVD 29[2]
Coordinates37°06′40″N 121°50′39″W / 37.111011844°N 121.844161333°W / 37.111011844; -121.844161333[1]
Naming
English translationDark Hill
Language of nameSpanish
Geography
Loma Prieta Peak is located in California
Loma Prieta Peak
Loma Prieta Peak
Loma Prieta Peak is located in the United States
Loma Prieta Peak
Loma Prieta Peak
Loma Prieta Peak (the United States)
Parent rangeSanta Cruz Mountains
Topo mapUSGS Loma Prieta
Climbing
Easiest routeRoadAlexander Dallas Bache

Loma Prieta (from Spanish loma -hill, prieta -dark) is 3,790 feet (1,160 m) high and is the highest peak in the Santa Cruz Mountains in Northern California.[3]

Although the 1989 Loma Prieta earthquake was named for this mountain, the actual epicenter was five miles southwest of the peak, across the San Andreas fault, in The Forest of Nisene Marks State Park.

In the 19th century, the peak was called Mount Bache, a name given in honor of Alexander Dallas Bache; the name is no longer in use.[4]

From 1955 to 2005, the mountain was the longtime site for the transmitter tower of San Jose television station KNTV. In September 2005, it moved its transmitter 83 kilometres (52 mi) northwest to San Bruno Mountain after it became the Bay Area's NBC affiliate.

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  • Loma Prieta Earthquake, ca. 1989
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Transcription

Geology

Loma Prieta is the tallest peak in the Santa Cruz Mountains and it is common to see snow on the mountain during the winter.

Loma Prieta and other nearby mountain peaks are pushed upward by local collision forces associated with a left bend in the San Andreas fault. Starting near Uvas Canyon, the fault stops trending northwest but instead bends west-northwest for about eight miles before continuing its northwest direction. This left bend is renowned among geologists as an archetypal restraining bend which acts to oppose strike-slip motion along the fault.[5] From the perspective of Loma Prieta and other mountains atop the Sierra Azul block, the Pacific Plate is trying to shear them off the North American Plate but can't break them off. Rather, the resulting transpression force pushes up the local terrain and helps explain why these are the highest peaks in the Santa Cruz Mountains.[6]

Astronomy

From 1976 through 1990 amateur astronomer Donald Machholz set up his telescope an average of 120 times a year on the south slope of this mountain to search for comets. From this site he discovered three new comets that bear his name, including Periodic Comet Machholz 1 96P/Machholz on May 12, 1986.

The first official West Coast Messier marathon was conducted from this site in March 1979.

See also

References

  1. ^ a b "Loma Prieta Reset". NGS Data Sheet. National Geodetic Survey, National Oceanic and Atmospheric Administration, United States Department of Commerce. Retrieved 2009-08-07.
  2. ^ "Loma Prieta Peak , California". Peakbagger.com. Retrieved 2009-08-07.
  3. ^ "Loma Prieta". Geographic Names Information System. United States Geological Survey, United States Department of the Interior.
  4. ^ Brewer, William Henry. Up and Down California in 1860-1864; The Journal of William H. Brewer: Book 2, Chapter 3 NEW ALMADEN. Retrieved 20 June 2019.
  5. ^ Hilley, G.E.; Dumitru, T.; Gudmundsdottir, M.H.; Burgmann, R. (December 2008). "Exhumation history of the Sierra Azul Block of the Santa Cruz Mountains Revealed Using Low Temperature Thermochronology". American Geophysical Union, Fall Meeting 2008. Bibcode:2008AGUFM.T43E..02H. Retrieved 2022-10-01.
  6. ^ Sloan, Doris (2006). Geology of the San Francisco Bay Region. Berkeley, California: University of California Press. p. 43. ISBN 978-0-520-24126-8.

External links

This page was last edited on 30 December 2023, at 22:00
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