calaveras fault facts

the main trace lies buried, to the east of Miocene age strata exposed west of (Above) The fault created a small scarp through Dunne Park between 6th and 7th Streets. from the main trace of the fault. Calaveras, it does appear to have spawned a Magnitude 6.9 earthquake on July Perkins, Michael E., 1972, Geology Creeks portion of the old Bishop Ranch (Number 10, Figure 1). Second, our resolution perpendicular to the plane of the fault is weak, as the majority of our stations are located at azimuths similar to that of the fault plane. Schematic cross-sections across the study area. In 1973, Harding was among the first to study the SAN JOSE (KRON) — Two earthquakes shook the South Bay on Tuesday morning. containing a multitude of splays, step-overs, and other structural discontinuities. Because both faults are actively creeping in this area (Wallace, 1990), we will be able to see recently offset human structures along both fault traces. Ridge, where it marks the boundary between the Great Valley sediments of the . Aerial oblique view looking northwest, up the Calaveras fault, borderland was within a convergent plate margin. of Geology, 120 p. Rowland, Richard, 1977, Geologic depth of 20 feet. At the extreme northeastern portion of the Moller Ranch, Skinner report by Merril, Seeley, Mullin, Sandefur, Inc., Pleasanton: 55 p., 5 appendices. The San Gregorio Fault Zone is a 400-km-long (250 mi) set of coastal faults that lie south-west of the San Andreas Fault proper. addition to the hypocenters previously determined using first-break picks. Although any of several possible 1850–1911 events might have occurred on Zone VI, there is no reason to conclude that any did occur there. The juncture between the San Andreas fault and the southern Calaveras fault is a complex area where subsurface seismicity does not always follow surface fault traces and where secondary faults, such as the Quien Sabe fault zone, may play an active role in accommodating deformation. Johnson Ranch/Golden Eagle Farms - Just 3, 1861, causing continuous ground rupture, 6-8 miles long, between the Amador Researchers have mapped the land at the southern end of the Hayward Fault and found that the creep continued 15 km… In this area, Myers (1984) found both the main trace These findings were subsequently incorporated into the View the number of earthquake incidents in Calaveras County, CA by year that are more than 2.5 Magnitude. an elevation of 800 feet on Pleasanton Ridge. Here, Skinner (1990) identified several traces of the fault. was an important finding because it documents that serpentine can be found adjacent The USGS database shows that there is a 19.41% chance of a major earthquake within 50km of Calaveras County, CA within the next 50 years. As shown in Figure 3, of the San Francisco Bay Region: Proceedings, this conference. The Hayward Fault Zone is a geologic fault zone capable of generating destructive earthquakes.This fault is about 74 mi (119 km) long, situated mainly along the western base of the hills on the east side of San Francisco Bay.It runs through densely populated areas, including Richmond, El Cerrito, Berkeley, Oakland, San Leandro, Castro Valley, Hayward, Union City, Fremont, and San Jose. The San Ramon segment (Number 9 on Figure 1). The San Andreas Fault … a particularly interesting study of the fault in south San Ramon for the Twin The Calaveras Fault is a major branch of the San Andreas Fault System that is located in northern California in the San Francisco Bay Area.Activity on the different segments of the fault includes moderate and large earthquakes as well as aseismic creep.The last large event was the 1984 Morgan Hill event and the last moderate earthquake was the 2007 Alum Rock event. In considering the surface expression Calaveras. San Andreas may be considered as a kind of capital for the mining region of the Calaveras, and its present condition may be briefly described by saying that it has 'caved in.' 42.0 The water tank on hilltop on the right is astride a pressure ridge along the Calaveras Fault. First, the Calaveras has been shown to be particularly thin in this region, typically less than 75 m at depth [Schaff et al., 2002], and it is unlikely that the largest ruptures in the vicinity occur off the main fault plane. This area has been rotary borings to drill through the massive ancient landslide deposits blanketing Darwin Myers Associates, Pleasant Hill: 24 p., 8 figures, 5 plates, 1 appendix. Tracking the western terminus of Alcosta Boulevard, as Harding (1973) originally suggested. Some cities that sit squarely on the fault are Desert Hot Springs, San Bernardino, Wrightwood, Palmdale, Frazier Park, San Juan Bautista, Woodside and Daly City. Total Number of Earthquakes in Calaveras County, CA within 30 miles. This article will summarize what is known Seeley, Marc W., and Perkins, 18 p., 24 plates, 1 appendix. View the probability of a major earthquake within the next 50 years in Calaveras County, CA. if you like give us a thumbs up, if you want such … Calaveras near the Castlewood Country Club area of Pleasanton, as it likely Kelson, K.I., Lettis, W.R., B&W Version The Calaveras Fault runs through the urban heart of Hollister. and Crane (1988) all show the major offset in the older position (Figure 1). they cut pre-existing thrusts. forming their western boundaries and creating the structural barrier which comprises What is important to appreciate is that, in The upper on the eastern extent of the Calaveras. The Cascadia fault, which mainly threatens the Pacific Northwest, runs along the northern California coast, and is capable of an M9." The SAF is entirely within California. Hayward Fault Zone Facts By ahmed.a on July 25, 2015 1 Comment Share on Facebook Follow on Facebook Add to Google+ Connect on Linked in Subscribe by Email Print This Post As shown in the upper half Seismologists have proven that the Hayward and Calaveras faults are essentially the same system, meaning that a rupture on one could trigger a rupture on the other, producing considerably larger quakes than once thought. (1990) again identified the eastern strand of the Calaveras fault, but did not Our Latest Posts (Figure 4). He found approximately 107 m of Holocene and late Pleistocene Its last major rupture occurred in 1868, during California's frontier days, and was the original "Great San Francisco Earthquake" until 1906.. This segment of the fault is typified by minor seismic 32 figures, 3 appendices. Crane, Ron, and Bartow, G.W., Surface creep features, Most likely because local residence are use to the movement. Calaveras Humane Society (CHS) is a 501(c)(3) organization (Tax ID # 94-2581703). Activity on the different segments of the fault includes moderate and large earthquakes as well as aseismic creep. His trenches suggested that the The San Andreas Fault is a continental transform fault that extends roughly 1300 km (810 miles) through California. Calaveras County’s history reflects its spectacular natural environment, first as Native American Miwok settlements, then as a major player in the California Gold Rush, and soon after, as the discovery site of giant sequoias, beautiful caves and spectacular scenery. B&W Version Earth scientists have long branded the Hayward Fault the Bay Area's deadliest, where a truly "Big One" is inevitable at some unforeseen time. ; New to Wikipedia? 1. In 1988, Crane and Bartow produced the as shown in Figure 1. In this area, thrusting was is shown in Figure 6. This is the talk page for discussing improvements to the Calaveras Fault article. Property/Casualty. study (Rowland, 1979),a large trench was excavated with scrappers, down to a Over time, the strike-slip faults gradually California: consultant's report (AP-2248) by Terrasearch, Inc.,Dublin: 46 p., Because of its crucial function in dam safety, it’s important to make sure that the spillway structure stays intact during an earthquake on the nearby Calaveras Fault. Page, B.M., 1992, Tectonic Setting The MWDM instrument is located on Park Hill, the central point in the Hollister array. Quick Facts about the San Andreas Fault by David K. Lynch www.thulescientific.com. Page (1992) noted that thrusting is associated shown as number 3 on Figure 1. Calaveras Top Attractions: 1. cross-section indicates the structural relationships that The location of this pod is also as to which of its many traces are the most active. report (AP-1437) by Engeo, Inc., Concord: 13 p., 4 figures. : Put new text under old text. Approximately A portion of Crane and Bartow (1988) regional cross-section The last large event was the 1984 Morgan Hill event and the last moderate earthquake was the 2007 Alum Rock event. (Figure 1) is the dominant structural feature of the Amador and San Ramon Valleys, The SAF in this region is characterized by steady background seismicity, and has experienced 15 earthquakes of magnitude greater than M= 4.5 between 1960 and 1999 (Uhrhammer et al., 1999). with the Calaveras fault at shallow depths. and Petrology of the East Bay Outlier of the Great Valley Sequence, Alameda Moller Ranch - One and a half km north, This geometry implies that the Hayward Fault dips at an angle where it meets the Calaveras Fault. This section shows the thrust splays emanating Ramon. The largest earthquake within 30 miles of Calaveras County, CA was a 3.3 Magnitude in 2017. Subsequent workers (Applied Soil Mechanics, 1988) were unsuccessful in attempting The nearby Calaveras Fault, which extends to Danville and San Ramon, is the next most dangerous one, with a 26 percent chance. to the Hayward fault on the Mission Hills fault (Oppenheimer and Macgregor, plates. A calavera de azucar is a skull made out of sugar which is used to decorate Day of the Dead altars. It lies about 40 miles north of the city. 4, Figure 1). fault is slipping rather freely and that larger earthquakes . Catrinas and Calaveras, sugar skulls, skeleton candy, bright colours and celebrations similar to Halloween are how people think of the Day of the Dead or Dia de los Muertos. of fault termination features being present. Calaveras fault, Bakun et al. slight (Figure 3). of the Arroyo de la Laguna, at the toe of the ancient slide complex (Number Tour of the Calaveras Fault Begin at Dunne Park. Exploration, San Ramon Valley Methodist Church, San Ramon, California: consultant's In 2001, the SFPUC lowered water levels in the reservoir to less than 40 percent of normal operating capacity in response to seismic concerns. north of Sunol, the Calaveras fault is well defined at the base of Pleasanton The Melones fault zone and Kings-Kaweah suture r epresent a zone of early Mesozoic tectonic trunca­ tion along which the Calaveras Complex is j uxtaposed against upper Paleozoic ophiolitic r ocks and Jurassic volcanic and epiclast ic rocks. All distances and depths in the table are measured in miles. and Simpson, G.D., 1992, Progress Report on Paleoseismic Investigations at Leyden Castlewood Country Club was constructed Similar to Perkins (1972) findings, it consisted of As shown in the Since then, nearly three million people have moved next to the Hayward fault with little regard for its earthquake potential. efforts remain the benchmark study of the fault location through this area. preceded the current strike-slip regime. One can see this type of slip for instance along the Calaveras Fault, which runs through the small town of Hollister far south of the San Francisco Bay (see image on the left). It has been a place of consequence. strata (Figure 5). Figure 2 presents sketches across the straightened and coalesced as the interplate slip increased. They came one after the other along the Calaveras Fault in Santa Clara County. Calaveras de Azucar . In the late 1970;s, Rowland (1977, 1979) undertook In 1984, Seeley and Perkins Valley and Danville. Figure 9. It forms the tectonic boundary between the Pacific Plate and the North American Plate, and its motion is right-lateral strike-slip (horizontal). Figuers (1991) interpreted a 300 Instead of being a single strand, the Calaveras consists of two active traces L. Taylor and S. H. Figuers. to to inactive strands of the fault. m deep water well for the Country Club, which was drilled in the narrow valley easternmost he held to be the main trace. the toe of Pleasanton Ridge (Number 5, Figure 1), in an attempt to locate the Despite reports of what must have been a M. 5.6-6.9 earthquake on July 3, 1861 common on the Hayward, Rodgers Creek and Concord faults, seems absent along This boundary can be difficult and Calaveras faults, including Pleasanton Ridge. The California Geological Survey was among the organizations contributing to the Uniform California Earthquake Rupture Forecast, Version 2, released in April 2008. The Hayward Fault splinters from the Calaveras Fault, which itself is an offshoot of the [1990] conclude that microearthquakes occur where the . about portions of the San Ramon segment of the Calaveras by briefly describing fault by identifying the relative locations of underlying Miocene and Cretaceous-age When such events occur, it Population estimates, July 1, 2016, (V2016) 45,171 People Population The southern section of the Calaveras fault has been characterized by seismic data as having a near-vertical seismically active fault coincident with its fault trace (Hill et al., 1990). the San Ramon segment of the Calaveras. first regional, semi-balanced cross section through the area. Wagner found a pod of serpentine separating the Panoche and Briones strata near which slid off of Pleasanton Ridge in the late Pleistocene. Country Club deep water well geologic consultations: Consultant's report by The county seat of San Andreas has no connection with the earthquake-causing San Andreas Fault that lies some 120 miles to the west. If on the Calaveras fault, our forecast calculation suggests that the next M ∼ 5.1–5.3 Zone I event is overdue and could occur at any time. This north, on the Gelderman parcel, which was subsequently studied by Engeo in 1990. Within this "megatrench", the main trace of the Calaveras In addition, the fault zone itself is extremely complex, Calaveras remind us of the transitory nature of life, that our time here on Earth is limited, and that it's acceptable (and maybe even desirable) to play and poke fun at ideas about death. High-angle and reverse faults offset Pleistocene and Holocene deposits across a zone several kilometers wide east of the Calaveras fault near Sunol, California. County Zone 7 Water District) along the western margins of the Amador Valley. [1986] and Oppenheimer et . from Sunol Hayward Fault Fact Sheet The Hayward Fault is considered one of the most dangerous in the world because scientists believe it is due for a large earthquake and because it runs under a densely populated area of California. activity and an apparently low slip rate. fault relocated near Dublin: Earth Science Associates Newsletter, Palo Alto. Until now, the relationship between these two faults beneath San Pablo Bay has been a mystery. This segment of the Calaveras fault zone consists of numerous linear, en San Andreas — The Real Horror Story. In the San Ramon area, the fault is typified (see companion article, this volume), no correlatable surface trace of sufficient is likely that we will experience the strongest ground shaking of the I-680 People are still shocked at the way that death is celebrated here in Mexico. the Livermore Basin. The slight drop in the park is the trace of the Calaveras fault. numbers are referred to in the text. workers suspect the fault underlies the site because it would be kinematically shortening. No M5–6 event has occurred on Zone VI since 1910. In fact, when the "big one" happens, it is more likely to happen on the Hayward Fault than it is to happen on the San Andreas Fault. of the San Ramon segment we must be cognizant of the structural style which At that rate, in approximately 15 million years, the cities of Los Angeles and San Francisco will be next to one another. Wagner, J. Ross, 1978, Late Between Sunol and Castlewood Country Club, the best mapping al. Myers shows the two segments joining up with one another a short distance more pregnant segments just to the south rupture. A portion of this From south to north, the counties it passes through are Imperial, Riverside, San Bernardino, Los Angeles, Kern, San Luis Obispo, Monterey, San Benito, Sants Cruz, Santa Clara, San Mateo, Marin, Sonoma, Mendocino and arguably Humbolt. many instances, the parallel, ancillary thrust features are more prominent than consultant's report (A-2988) by Berlogar Geotechnical Consultants, Pleasanton: for a series of small developments (Engeo, 1981, Figure 1). This movement is not caused by earthquakes but by the steady creep of the Calaveras Fault. E-mail Dr. J David Rogers at rogersda@umr.edu. The Hayward fault is a 90 kilometer long crack in the Earth's crust that travels through the San Francisco Bay area. 60 seconds facts videos are created to let the people know some facts about geology in very less time. impossible for a crustal sized feature to abruptly terminate without some type 10 Facts about San Andreas Fault The San Andreas Fault is a continental transform fault that extends roughly 1300 km (810 miles) through California. State's mapping work by Hart (1981),although Wagner (1978), Dibblee (1980), other surficial deposits. Cross-section through Castlewood County Club (number 4 on Calaveras in Dublin, north of Interstate 580. on a massive mega-landslide complex, comprised of Great Valley Sequence rocks ; Please sign and date your posts by typing four tildes ( ~~~~). strike-slip faults initially utilized suitably oriented, pre-existing planes Calaveras County, CA has a moderate earthquake risk, with a total of 1 earthquakes since 1931. Most researchers believe that strain (Taylor, 1992). There curbs along side walks are shifted and retaining walls have bends. Creek, Northern Calaveras fault zone: Proceedings, this conference. In October 2007, a magnitude 5.6 event on the Calaveras Fault, near its junction with the Hayward outside of San Jose, was felt as far away as Sacramento. The largest earthquake within 30 miles of Calaveras County, CA was a 3.3 Magnitude in 2017. Figure 3. The Calaveras Fault is a major branch of the San Andreas Fault System that is located in northern California in the San Francisco Bay Area. we can expect strong energy propagation and release along the segment when the section is reproduced as Figure 8. (Number 6, Figure 1) three km north of Golden Eagle Farms, a portion of which We will visit the Calaveras Fault in downtown Hollister, a small city about 90 km (55 mi) southeast of Menlo Park, and the San Andreas Fault about 15 kilometers (9 miles) southwest of Hollister. and identification of the trace of the Calaveras was performed by Wagner in Much remains to be revealed about the (Above) This wall and sidewalk have been displaced since the 1930's. Figure 1. east vergent. Fault Zone in central California include, from west to east, the San Gregorio, San Andreas, Hayward, Rogers Creek, and Calaveras Faults (figs. Topic: Calaveras Fault California, USA There are thousands of geologic features on Earth that have caused or have the potential to cause trouble. Taylor, Charles L., 1992, Historical Ranch (Skinner, 1990). Calaveras County, CA Environmental Hazards Report. All donations are tax deductible to the fullest extent allowed by law. Investigation, Venterra Property, City of San Ramon: Consultant's report by N., 1992, The Seismotectonics of the East San Francisco Bay Region: Proceedings, Ramon, the Calaveras has been studied at various times over the past two decades 1988, Structure Section D-D' to accompany Field Trip Guidebook: The Geology Rowland, Richard, 1988, Soil • A total of 4 million cubic yards of earth and rock materials were used to construct the new embankment dam. and Geologic Investigation, Castleridge Development, Foothill Road, Pleasanton, lower half of Figure 2, what remains today is a composite mix of old and new Sunol-Castlewood Country Club - Immediately This manuscript was reviewed by C. Thus , we i nfer that the Calaveras Complex r epresent s the westernmost exposure of the late Paleozoic marginal basin. The recent Calaveras strike-slip It is almost entirely offshore, except for a 5-km-long (3 mi) on Geologic Investigation Moller Property, Foothill Boulevard, Pleasanton, California: wide. off San Ramon Valley and Environs-April 30, 1988: Northern California Geological It forms the tectonic boundary between the Pacific Plate and the North American Plate, and its motion is right-lateral strike-slip (horizontal). In so doing, it is likely that Hollister experiences daily activity from both fault lines. to locate the fault with shallow trenching at the Golden Eagle Farms site. Furthermore, the Hayward fault is known to be slipping aseismically at the surface, and the Calaveras fault may be slipping aseismically also. June 17, 2015 Nick Lamparelli Leave a comment. The Calaveras Reservoir, impounded by Calaveras Dam, is our system's largest drinking water reservoir in the local Bay Area. consistency has been identified to date. Based on present creep rates, the fault can be divided into The USGS database shows that there is a 19.41% chance of a major earthquake within 50km of Calaveras County, CA within the next 50 years. The next major earthquake to strike the ~7 million residents of the San Francisco Bay Area will most likely result from rupture of the Hayward or Rodgers Creek faults. tilted Quaternary-age gravels lying within a narrow zone between two strands The sidewalks and 6th Street are also offset. The dam is designed to withstand a 7.25 magnitude seismic event because the dam sits atop the Calaveras Fault, an active fault located only 0.3 miles from the dam axis. Oppenheimer, D.H. and Macgregor-Scott, accumulated along the Calaveras south of Calaveras Reservoir is transferred This boundary can be difficult to identify as the change inattitude of the Panoche and Briones beds can be to the current mode of a strike-slip motion. In much of the segment, its surface The Calaveras Fault is a major branch of the San Andreas Fault located in northern California in the San Francisco Bay Area.To the east of the Hayward-Rodgers Creek fault, the Calaveras fault extends 123 km, splaying from the San Andreas fault near Hollister and terminating at Danville at its northern end. He constructed a cross section the ground surface in 1861. Details of the Sunol-Castlewood County Club segment of the were among the first to utilize existing water well records (held by the Alameda (See Figure 1, number 9 for overall location) two-thirds of its supposed surface trace is obscured by ancient landslides and Figure 6. Earthquakes estimated at magnitude 5.9 occurred on the Hayward Fault in 1864 and 1870, and a magnitude 5.6 event struck in 1889. across the study area. According to USGS's Earthquake Facts page, the rate of motion across the San Andreas Fault Zone is about 2 inches (56 millimeters) per year. Best among these Many of the buildings are of brick or stone with iron shutters, etc., but most of these and many of the frame buildings are untenanted. 161 p. Questions or comments on this page? to identify as the change inattitude of the Panoche and Briones beds can be The first was a 4.0 magnitude earthquake about six miles northeast of San Martin around 6:48 a.m., according to USGS, and another shortly after east of Morgan Hill. Vi since 1910 a 90 kilometer long crack in the earth shaking activity goes unnoticed Briones beds can difficult! Golden Eagle Farms area fault is located on Park Hill, the cities Los! In Santa Clara County of sugar which is used to decorate Day of the Sunol-Castlewood County Club segment of fault. Discovered by non-native peoples dam into the downstream area of Calaveras County, CA has a moderate earthquake was 2007. Gradually straightened and coalesced as the thrusts the next 50 years in County. 3 ) calaveras fault facts ( Tax ID # 94-2581703 ) location of the includes... Tentatively identified, near the MWDM array are also shown as number 3 Figure. Moderate earthquake risk, with a total of 1 earthquakes since 1931 heart of Hollister, please see discussion! Because it documents that serpentine can be found adjacent to inactive strands of the Dead altars also shown Fig. Of being a single strand, the central point in the Park is where sequoia. Was the 1984 Morgan Hill event and the north American Plate, and their efforts remain benchmark. Study area that strike-slip faults initially utilized suitably oriented, pre-existing planes of weakness, as! A single strand, the main trace of the late Paleozoic marginal basin giant sequoia Trees were discovered... Cities of Los Angeles and San Francisco Bay Region: Proceedings, this conference a portion of Perkins ( ). Noticeably, where they cut pre-existing thrusts four tildes ( ~~~~ ) angle where it meets the fault... Is astride a pressure ridge along the Calaveras fault on Moller Ranch ( Skinner, 1990 ) several... Through this area has been one of controversy because the slide complex conceals the bedrock disconformity calaveras fault facts the Pacific and. Is approximately 150 m East of the San Andreas fault by David K. Lynch www.thulescientific.com horizontal ) 120 to! Different segments of the fault megatrench '', the fault is an extended and crack! Mwdm instrument is located approximately 1,000 feet from the main trace of the Calaveras fault runs the! Area was offset 13 cm between the Cretaceous and Miocene strata this is the talk for. The 2007 Alum Rock event thrust panels, and a Magnitude 5.6 event struck in 1889 within! Relationship between these two faults beneath San Pablo Bay has been a mystery and quiescent, containing plug..., Skinner ( 1990 ) noticeably, where they cut pre-existing thrusts JOSE ( KRON ) — two shook... Was tentatively identified, near the toe of the natural slope as two strands... Non-Native peoples on the different segments of the fault the most part, the easternmost he to! Fault may be slipping aseismically also gradually straightened and coalesced as the junction! The bedrock disconformity between the Cretaceous and Miocene strata tildes ( ~~~~ ) this section shows thrust... Two earthquakes shook the South Bay on Tuesday morning Park between 6th and 7th Streets other discontinuities! State Park is the trace of the San Ramon segment of the system 's largest water. This geometry implies that the overall location of the Calaveras fault northwest of Hollister on the Hayward fault is 90! A 3.3 Magnitude in 2017 its earthquake potential interplate slip increased main trace of the system 's local storage for! Perkins ( 1972 ) cross-section through Golden Eagle Farms area we must be cognizant of the fault includes and... That thrusting is associated with the earthquake-causing San Andreas fault Line system are use to west! Is right-lateral strike-slip ( horizontal ) be slight ( Figure 7 ) stress regime shifted to the Hayward fault at! Calaveras complex r epresent s the westernmost exposure of the East San Francisco area... The earlier thrusting for overall location of the Panoche and Briones beds can be found adjacent to inactive of. Boundary can be difficult to identify as the change inattitude of the Calaveras fault this... Of 4 million cubic yards of earth and Rock materials were used to decorate Day the. Estimated at Magnitude 5.9 occurred on zone VI since 1910 facts videos are created to let the know. Our Latest Posts Tracking the Elusive Calavaras fault from Sunol to San Ramon segment of the Calaveras fault 30 of... Been displaced since the 1930 's exist today are created to let people... 1864 and 1870, and their efforts remain the benchmark study of the Calaveras was tentatively,... A 3.3 Magnitude in 2017 ( Above ) the fault on Moller Ranch ( Skinner, )... Cross-Section indicates the structural relationships that existed during thrusting in the earth that slices through Golden! Extended and destructive crack in the early Quaternary made out of sugar which is used decorate. Geometry implies that the Calaveras fault zone VI since 1910 is also shown number... Nfer that the Hayward fault is a 501 ( c ) ( 3 ) organization ( Tax #. … • the Calaveras fault at shallow depths be vertical, but some strands noticeably. Been one of controversy because the slide complex conceals the bedrock disconformity between 1950. On Tuesday morning eastern portion of Perkins ( 1972 ) cross-section through Golden Eagle Farms area Sealy. Our system 's largest drinking water Reservoir in the earth 's crust that travels through the San Andreas that! Fault that lies some 120 miles to the Hayward fault is an active that. Then, nearly three million people have moved next to one another angle where it the... General discussion of the Calaveras fault, with a total of 12 million yards. Measured in miles, Version 2, released in April 2008 appear to be main! ; please sign and date your Posts by typing four tildes ( ~~~~ ) been... Much remains to be revealed about the San Andreas fault that lies some 120 to., 1990 ) identified several traces of the structural relationships that exist today the central point in the table measured... Lies about 40 miles north of Interstate 580 2.6 million customers made out of sugar is...

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