Verdugo Mountains
Verdugo Mountains | |
---|---|
Verdugos | |
Highest point | |
Peak | Verdugo Peak |
Elevation | 3,126 ft (953 m) |
Geography | |
location of Verdugo Mountains in California[1] | |
Country | United States |
State | California |
District | USGS Burbank |
The Verdugo Mountains, also known as the Verdugo Hills or simply The Verdugos,[2] are a small, rugged mountain range of the Transverse Ranges system in Los Angeles County, California. Located just south of the western San Gabriel Mountains, the Verdugo Mountains region incorporates the cities of Burbank, Glendale, Pasadena, and La Cañada Flintridge; the unincorporated communities of Altadena and La Crescenta-Montrose; as well as the City of Los Angeles neighborhood of Sunland-Tujunga.[3]
Surrounded entirely by urban development, the Verdugo Mountains represent an isolated wildlife island and are in large part under public ownership in the form of undeveloped parkland. The mountains are used primarily for recreation in the form of hiking and mountain biking, and as the site of communications installations on the highest peaks.
The mountains arise directly from the eastern floor of the San Fernando Valley, exaggerating their height from some vantages. Beginning with foothills, they rapidly rise to rugged sections, with the highest peaks topping 3,000'.
Geography
The northwest-trending range is approximately 8 miles (13 km) long by 3.25 miles (5.23 km) wide, and roughly parallels the southern front of the San Gabriel Mountains at a distance of 1 mile (1.6 km) to 2 miles (3.2 km), with the Crescenta Valley lying between the two. The southern front of the range forms part of the northeastern boundary of the San Fernando Valley; at their southeastern end the Verdugo Mountains are separated from the San Rafael Hills by the Verdugo Wash.
The highest summit is the informally named Verdugo Peak (3,126 feet (953 m)), located near the center of the range and rising to approximately 2,200 feet (670 m) above its southern base. Other peaks include Tongva Peak (2,656
The Verdugo Mountains lie within the corporate boundaries of the cities of Glendale, Burbank, and Los Angeles. The neighborhood of La Crescenta, most of which lies within Glendale, is adjacent to the range's northern end, as are the Los Angeles neighborhoods of Tujunga, Sunland, Shadow Hills, and Sun Valley (the last of which includes La Tuna Canyon).
Geology
The Verdugo Mountains consist of an east-west-trending antiformal
The rocks within the Verdugo Mountains block are almost entirely igneous and metamorphic similar to the crystalline basement rocks exposed to the north in that portion of the San Gabriel Mountains south of the San Gabriel Fault. These consist of
.The Verdugo Mountains are part of the western Transverse Ranges, which have risen in the last 7 million years[citation needed] as the result of contractional deformation resulting from transpressional motion and rotation of crustal blocks in the "Big Bend" region of the San Andreas Fault.[6][7] The amount of crustal shortening since the beginning of the Pliocene has been estimated to be on the order of 7 kilometers (4.3 mi). The Verdugo fault and Sierra Madre thrust are part of a complex system of faults that accommodate some of this shortening and generally become younger to the south, with the Verdugo Fault possibly being the youngest member of this system and forming the current boundary between this portion of the western Transverse Ranges and the Los Angeles basin.[8] Uplift along the Verdugo fault may total approximately 2.5 km (1.6 mi), at a minimum rate of 1.1 km (0.68 mi) per million years since 2.3 million years ago,[9] moving the crystalline rocks of the Verdugo Mountains up and over younger Tertiary and Quaternary sediments to the south. The Verdugo Mountains are, therefore, young and rapidly rising, reflected in their steep topography and rapid rates of erosion.
Municipalities and neighborhoods[10]
Incorporated cities (independent)
Unincorporated communities
City of Los Angeles neighborhoods of The Verdugos
Flora, fauna and climate
Except for a tenuous link to the large wild area in the
The Verdugo Mountains have warm, dry summers and cool wet winters. Snow infrequently falls along the crest during the coldest winter storms, but melts rapidly. Annual average precipitation increases with elevation (due to the
History
The mountains were part of the indigenous
The Verdugo Mountains were named for
Glendale & Mount Verdugo Railway
One of the earliest attempts to access and develop the interior of the Verdugo Mountains was the 1912 proposal by Colonel Lewis Ginger to build a cable incline railroad to the summit of Mount Verdugo, now known as Mount Thom.[
Wildfire
Fire is a natural component of the chaparral ecosystem, and the plants that comprise it are largely adapted to survive fire or to reproduce after it.[22] More specifically, the members of this plant community are adapted to a particular fire regime, which is characterized by intensity and seasonality, but most importantly, by the frequency of fires.[23] In the southern California chaparral, natural frequencies of 30 to 40 years are typical, with some areas going as long as 100 years without fires and others burning more frequently.[24] It has been estimated the chaparral plant community can persist over the long term only with a fire frequency at a given site of no shorter than several decades, or perhaps longer, although there is variability in the tolerance of different species. Repeated shorter intervals between fires promote so-called "type conversion", in which the shrubby species are replaced by grasses, particularly non-native grasses, and other weedy species.
The Verdugo Mountains have been subject to repeated wildfires in historical times. Major occurrences in the twentieth century include the December, 1927 Burbank Canyon Fire, which started in Haines Canyon in the San Gabriel Mountains and burned south into the range, consuming approximately 100 homes in Burbank's Sunset Canyon.[25] The La Tuna Canyon Fire of November, 1955 burned over almost the entire western portion of the range, ultimately destroying approximately 4,500 acres (1,800 ha).[26] The Whiting Woods Fire of March, 1964, started by a power line downed by high winds, burned from the northern edge of the range southward over to crest to consume homes in Glendale. A fire in November, 1980, also called the La Tuna Canyon Fire, burned 10,000 acres (4,000 ha) in the northern and western portions of the range.[27] Since 2000, three major fires have occurred in the Verdugo Mountains. In September, 2002, the Mountain Fire burned over two days approximately 750 acres (300 ha) above Glendale, largely on the southern side of the range.[28] The Harvard Fire started on September 29, 2005, and consumed 1,024 acres (414 ha) both north and south sides of the range north of Burbank during a six-day period.[29] In September, 2017, the
Beginning in 1921, the
Protected areas
- Verdugo Mountains State Park, California Department of Parks and Recreation
- Verdugo Mountains Open Space Preserve, jointly operated by the Santa Monica Mountains Conservancy and the City of Glendale
- Brand Park, Glendale
- Stough Canyon Nature Center, Burbank
- Wildwood Canyon Park, Burbank
- La Tuna Canyon Park, Los Angeles
- Tujunga Ponds, Los Angeles
The Verdugo Mountains are being considered as part of the proposed Rim of the Valley Corridor
Access and recreational use
Other than the Foothill Freeway (I-210) and the nearly parallel La Tuna Canyon Road, both of which traverse only the northwestern tip of the range, the Verdugo Mountains are crossed by no paved roads. By contrast, the range contains more than 25 miles (40 km) of graded and well maintained fire roads that are used extensively by hikers and mountain bike riders. Several abandoned and overgrown fire roads and ridge-top fire breaks are used recreationally as well. Trails, in the sense of engineered and maintained footpaths, are few, the most notable being the 2.2 mile (3.5 km)-long La Tuna Canyon Trail, which was constructed in 1989 by the Los Angeles Conservation Corps with funds provided by the Santa Monica Mountains Conservancy.[33]
See also
References
- ^ "Verdugo Mountains". Geographic Names Information System. United States Geological Survey, United States Department of the Interior. Retrieved 2009-05-04.
- ^ "Verdugos". Mapping L.A. Retrieved 2021-05-20.
- ^ "Sunland". Mapping L.A. Retrieved 2021-05-20.
- ^ a b Arkle, Jeanette, C, and Armstrong, Phillip A. (2007). "Quaternary exhumation of the Verdugo Mountains, Los Angeles Basin, constrained by low-temperature thermochronometry." Geological Society of America Abstracts with Programs, vol. 39, no. 6, p. 83.
- ^ Weber, F. Harold, Jr., and others (1980). Earthquake Hazards Associated with the Verdugo-Eagle Rock and Benedict Canyon Fault Zones, Los Angeles County California. Calif. Div. Mines and Geology Open File Report 80-10
- ^ Luyendyk, B. P. (1991). "A model for Neogene crustal rotations, transtension, and transpression in southern California". Geological Society of America Bulletin, vol. 103, pp. 1528–1536.
- ^ Schneider; C. L., Hummon, C.; Yeats, R. S.; and Huftile, G.J. (1996). "Structural evolution of the northern Los Angeles basin, California, based on growth strata." Tectonics, vol. 15, pp. 341–355.
- ^ Arkle, Jeanette C.; and Armstrong, Phillip A. (2009). "Exhumation of the Verdugo Mountains, Southern California; constraints from low-temperature thermochronology and geomorphic analysis." Geological Society of America Abstracts with Programs, vol. 41, no. 67 p. 300.
- ^ Meigs, Andrew; Yule, Doug; Blythe, Ann; and Burbank, Doug (2003). "Implications of disturbed crustal deformation for exhumation in a portion of a transpressional plate boundary, Western Transverse Ranges, Southern California." Quaternary International, vol. 101–102, pp. 169–177.
- ^ "Verdugos". Mapping L.A. Retrieved 2021-05-20.
- ^ "Sunland". Mapping L.A. Retrieved 2021-05-20.
- ^ Munz,Phillip A., in collaboration with David D. Keck (1968). A California Flora and Supplement. Berkeley: University of California Press.
- ^ Sawyer, J., and Keeler-Wolf, T. (1995). A Manual of California Vegetation. Sacramento: California Native Plant Society.
- ^ Groves, Martha (May 29, 2015). "Meet the Verdugo Mountains' very own mountain lion: P-41". Los Angeles Times.
- ^ Tchekmedyian, Alene (July 8, 2016). "Bear spotted at Burbank golf course". Burbank Leader.
- ^ Quinn, Ronald D., and Keeley, Sterling C. (2006) Introduction to California Chaparral. Berkeley: University of California Press.
- ISBN 0-8018-6642-1, page 31
- ISBN 978-1-62584-067-7.
- ^ "The Lost Indian Village of the Crescenta Valley - Crescenta Valley Weekly". Retrieved 2023-04-23.
- ^ ISBN 0-8059-4172-X..
- ^ Duke, Donald (1998). Incline Railways of Los Angeles and Southern California. San Marino CA: Golden West Books.
- Terrestrial Vegetation of California, 3rd ed. Berkeley: University of California Press.
- ^ Quinn, Ronald D., and Keeley, Sterling G. (2006). Introduction to California Chaparral. Berkeley: University of California Press.
- ^ Carle, David (2008). Introduction to Fire in California. Berkeley: University of California Press.
- ^ "The 1927 Burbank Canyon Fire". Burbank Fire Department website (former posting). Retrieved 12 February 2011.
- ^ a b "The 1955 La Tuna Canyon Fire". Los Angeles Fire Department Historical Archive. Retrieved 12 February 2011.
- ^ a b Boucher, David, 1991. Ride the Devil Wind: a History of the Los Angeles County Forester & Fire Warden Department and Fire Protection Districts. Bellflower, CA: Fire Publications, Inc.
- ^ "Mountain Fire Damage Assessment and Rehabilitation" (PDF). Glendale Fire and Rescue News. October 2002. Archived from the original (PDF) on 19 July 2011. Retrieved 12 February 2011.
- ^ "Southern California Wildfires 2005". Wildfire.com: the Home of the Wildland Firefighter. Archived from the original on 18 July 2011. Retrieved 12 February 2011.
- ^ Alpert Reyes, Emily; Curwen, Thomas; Tchekmedyian Reyes, Alene (September 3, 2017). "210 Freeway reopened, all evacuation orders lifted as firefighters gain upper hand on Verdugo Mountains fire". KTLA. Retrieved September 3, 2017.
- ^ "Rim of the Valley Corridor Special Resource Study". National Park Service. Retrieved 2014-12-30.
- ^ Kamal, Sameea (March 4, 2015). "Three lawmakers urge Park Service action on Rim of the Valley study". Los Angeles Times.
- ^ McKinney, John (1994). Walking Los Angeles New York: HarperCollinsWest.
Further reading
- Tectonics of the San Gabriel Basin and surroundings, southern California. Robert S. Yeats. Corvallis, Oregon: Oregon State University, Department of Geosciences, 2004.
- Los Angeles River: Its Life, Death, and Possible Rebirth. Blake Gumprecht. ISBN 0-8018-6642-1.
- Afoot & Afield in Los Angeles County, 2nd edition, Area B-5. Jerry Schad. ISBN 0-89997-267-5.
- Tectonics of the San Gabriel Basin and surroundings, southern California. Robert S. Yeats. Corvallis, Oregon: Oregon State University, Department of Geosciences, 2004.
- Paleoseismology, active tectonics, and seismic hazards of the Verdugo fault zone, Los Angeles County, California. James F. Dolan. The University, 1997.
- Segmentation, slip rates and earthquake dimensions in the active fold-thrust belt of northern Los Angeles Basin, California. Robert S. Yeats. Dept. of Geosciences, Oregon State University, 1996.
- Geology of Earthquakes. Robert S. Yeats, ISBN 0-19-507827-6.
- Living with Earthquakes in California: A Survivor's Guide. Robert S. Yeats. Oregon State University Press, 2001. ISBN 0-87071-493-7.
- The geology of a portion of the western Verdugo mountains. Robert L. Johnston, 1938.
- Geology Underfoot in Southern California. Robert Sharp and Allen Glazner. Mountain Press, 1993. ISBN 0-87842-289-7(2nd Edition released in 2020).
- Assembling California. John McPhee. Farrar, Straus and Giroux, 1993. ISBN 0-374-10645-2.
- Cycles of Rock and Water: At the Pacific Edge. Kenneth A. Brown. HarperCollins, 1993. ISBN 0-06-016056-X.
- Birds of Los Angeles: Including Santa Barbara, Ventura and Orange Counties. Chris C. Fisher and Herbert Clarke. Lone Pine Publications, 1997. ISBN 1-55105-104-4.
- A Flora of Southern California. Philip A. Munz. University of California Press, 1974.
- Native Trees of Southern California. Victor P. Peterson. University of California Press, 1970.
- Illustrated Guide to the Oaks of the Southern Californian Floristic Province: The Oaks of Coastal Southern California and Northwestern Baja California. Fred M. Roberts Jr. F. M. Roberts Publishing, 1995. ISBN 0-9643847-0-1.
- Plant Life in the World's Mediterranean Climates: California, Chile, South Africa, Australia and the Mediterranean Basin. Peter R. Dallman. University of California, 1998. ISBN 0-520-20808-0.
- Island Called California: An Ecological Introduction to Its Natural Communities. Elna Bakker. Second Edition. University of California Press, 1984. ISBN 0-520-04947-0.
- Natural History of Vacant Lots (California Natural History Guides). Matthew F. Vessel and Herbert H. Wong. University of California Press, 1987. ISBN 0-520-05250-1.
- Growing California Native Plants. Marjorie D. Schmidt. University of California Press, 1981. ISBN 0-520-03762-6.
- Introduction to California Beetles. Arthur V. Evans and James N. Hogue. University of California Press, 2004. ISBN 0-520-24035-9.
- Geography and evolution in the pocket gophers of California. Joseph Grinnell. USGPO, 1927.
- Evolutionary Dynamics of the Pocket Gopher Thomomys Bottae, With Emphasis on California Populations. James L. Patton and Margaret F. Smith. University of California Press, 1990. ISBN 0-520-09761-0.
- The Verdugos of Hispanic California. Marie E. Northrop. 1978.
Maps
- Angeles Front Country Trail Map. ISBN 1-877689-65-3.
- Verdugo Mountains trail map. Matt Maxon, 2005 http://pctmap.homeip.net/data/PDF/Verdugo%20Mtns%2001-16-05.pdf[permanent dead link]
- Burbank, California, 7.5 minute topographic quadrangle map. United States Geological Survey.
- Pasadena, California, 7.5 minute topographic quadrangle map. United States Geological Survey.
- Mount La Tuna - 34°13′24″N 118°20′15″W / 34.22327°N 118.33763°W
- Verdugo Peak - 34°12′55″N 118°16′48″W / 34.21518°N 118.28001°W
- Tongva Peak - 34°11′50″N 118°15′30″W / 34.19722°N 118.25833°W
- Mount Thom - 34°11′14″N 118°15′21″W / 34.18717°N 118.25596°W
External links
- Outdoor LA Hiking Trails - Hiking trails in the area with maps and directions to the trailheads.
- Verdugo Mountains Park Property - California State Parks page for the Verdugo Mountains Park Property
- Rim of the Valley Corridor Special Resource Study - National Park Service page about the Rim of the Valley Corridor
- LA Trails - Verdugo Mountains - a listing of most of the hiking trails in the Verdugo Mountains.
- Verdugo Hills Community Hike - an annual community hike and trail run in the Verdugos involving the Glendale, Burkbank, and Crescenta Valley communities
- Parks in the Verdugo & San Rafael Mountains Region - Santa Monica Mountains Conservancy page, with an interagency list of parks and other protected areas in the Verdugo Mountains/San Rafael Hills area