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![Simplified geology of the northern San Francisco Bay area showing the Sonoma and Clear Lake volcanic fields (modified from Saucedo et al., 2002; Ludington et al., 2006). Black lines are faults, sense of displacement not shown (modified from Bryant, 2005; Graymer et al., 2006b); CF—Calaveras fault; RCF—Rodgers Creek fault; TF—Tolay fault. BHV—volcanic rocks in the Berkeley Hills; BMV—Burdell Mountain Volcanics; TV—Tolay Volcanics; P—Pinole; R—Rodeo; V—Vallejo; WP—Wilson Point. Inset tectonic map shows the Cascadia subduction zone (CSZ), Mendocino fracture zone (MFZ), Mendocino Triple Junction (MTJ), and San Andreas fault (SAF). Extent of modern Cascades arc volcanics shown in gray pattern (from Luedke and Smith, 1981); QSV—Quien Sabe Volcanics.]()
![Map showing volcanic fields, eruptive centers discussed in the text, and major faults north of San Pablo Bay. The Burdell Mountain and Tolay Volcanics have been correlated across faults of the East Bay fault system (Fig. 1). The Sonoma Volcanics have been subdivided into the western age group (WSV), the eastern age group (ESV), and the northern age group (NSV). The Sears Point–Meacham Hill fold-and-thrust belt is also shown. Locations of stratigraphic columns in the western Sonoma Volcanics: SM—Sonoma Mountain assemblage; SC—Sonoma Creek assemblage; A—Arrowhead Mountain assemblage; BK—Bismarck Knob assemblage; SR—Sugarloaf Ridge assemblage.]()
![Aeromagnetic map filtered to enhance shallow sources. Magnetization boundaries derived from this map are shown in Figure 7. Brown lines are faults. White dotted lines are extensions of faults. Black dashed line is extension of the Pinole fault (PiF) based on basin thickness (Fig. 5). Gray line is inferred location of the Petaluma Valley fault (PVF) from Graymer et al. (2002). Blue-rimmed white circles are important wells. Red circles highlight potential volcanic centers or calderas. Blue arrows point to possible correlative anomalies across the Burdell Mountain (BM) fault. Towns: C—Calistoga; Gl—Glen Ellen; Gv—Green Valley; H—Healdsburg; N—Napa; P—Petaluma; S—Sonoma; StH—St. Helena; SR—Santa Rosa; V—Vallejo; Y—Yountville. Faults: BVF—Bennett Valley; CaF—Carneros; GVF—Green Valley; HaF—Hayward; HF—Healdsburg; PiF—Pinole; RCF—Rodgers Creek; SCF—Soda Creek; TF—Tolay; WNF—West Napa; WSVF—West Sonoma Valley. Other features: Co—Cotati gravity low; dc—dike complex; MSH—Mount St. Helena; SoH—Sonoma highlands; Su—Sugarloaf Ridge; TR—Trenton Ridge; TV—Tolay Volcanics; W—Windsor gravity low; vc—volcanic center.]()
![Aeromagnetic map filtered to enhance deep sources. Aligned red circles are magnetization boundaries. Brown lines are faults. White dotted lines are extensions of faults. Blue-rimmed white circles are important wells. Gray line is inferred location of the Petaluma Valley fault (PVF) from Graymer et al. (2002). Black dashed line is extension of the Pinole fault (PiF) based on basin thickness (Fig. 5). Green dots denote seismicity (Waldhauser and Ellsworth, 2000). Towns: C—Calistoga; Gl—Glen Ellen; Gv—Green Valley; H—Healdsburg; N—Napa; P—Petaluma; S—Sonoma; StH—St. Helena; SR—Santa Rosa; V—Vallejo; Y—Yountville. Faults: BVF—Bennett Valley; CaF—Carneros; GVF—Green Valley; HaF—Hayward; HF—Healdsburg; PiF—Pinole; RCF—Rodgers Creek; SCF—Soda Creek; TF—Tolay; WNF—West Napa; WSVF—West Sonoma Valley. Other features: BM—Burdell Mountain; Co—Cotati gravity low; dc—dike complex; MSH—Mount St. Helena; SoH—Sonoma highlands; Su—Sugarloaf Ridge; TR—Trenton Ridge; TV—Tolay Volcanics; W—Windsor gravity low; vc—volcanic center.]()
![Aeromagnetic map filtered to enhance medium depth sources. Aligned red circles are magnetization boundaries. Brown lines are faults. White dotted lines are extensions of faults. Blue-rimmed white circles are important wells. Gray line is inferred location of the Petaluma Valley fault (PVF) from Graymer et al. (2002). Black dashed line is extension of the Pinole fault (PiF) based on basin thickness (Fig. 5). Black arrows near and northwest of the Tolay fault (TF) point to magnetic edges that may restore against each other; blue arrows point to possible correlative anomalies across the Burdell Mountain fault. Towns: C—Calistoga; Gl—Glen Ellen; Gv—Green Valley; H—Healdsburg; N—Napa; P—Petaluma; S—Sonoma; StH—St. Helena; SR—Santa Rosa; V—Vallejo; Y—Yountville. Faults: BVF—Bennett Valley; CaF—Carneros; GVF—Green Valley; HaF—Hayward; HF—Healdsburg; RCF—Rodgers Creek; SCF—Soda Creek; WNF—West Napa; WSVF—West Sonoma Valley. Other features: BM—Burdell Mountain; Co—Cotati gravity low; dc—dike complex; MSH—Mount St. Helena; SoH—Sonoma highlands; Su—Sugarloaf Ridge; TR—Trenton Ridge; TV—Tolay Volcanics; W—Windsor gravity low; vc—volcanic center.]()
![A chart showing generalized stratigraphic relationships of Neogene units in the Petaluma Valley, Sonoma Mountains, Sonoma Valley, and Mayacmas Mountains. West of the Rodgers Creek fault, tephra, including the tuff of Zamaroni Quarry (7.26 Ma), the Lichau Creek tuff (6.74 Ma), and the Roblar tuff (6.26 Ma), were erupted from the Zamaroni Quarry–San Pablo Bay volcanic center. East of the Rodgers Creek fault, the tephra assemblage is younger, including the Pinole Tuff (5.2–5.4 Ma), the Lawlor Tuff (4.84 Ma), the Carriger tuff (4.81 Ma), the tuff of Napa (Healdsburg) (4.76 Ma), and the Putah Tuff (3.27–3.35 Ma). The Petaluma Formation is divided in a lower unit (Tpl), a middle unit (Tpm) (after Allen, 2003), and an upper unit (Tpu) based on this investigation. Other units are the marine Neroly Formation, Tolay Volcanics (Tov), Sonoma Volcanics undivided (Tsv), lower Sonoma (Tsvl) and upper Sonoma (Tsvu) Volcanics, sand and gravel of Cotati (Tco), Wilson Grove Formation (Twg), and Glen Ellen Formation (QTge).]()
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![(A) Palinspastic reconstruction of Tolay and Berkeley Hills volcanic fields ca. 10 Ma or earlier. Magma rose along faults associated with the incipient Hayward fault zone (Graham et al., 1984) and were erupted from the Round Top eruptive center (Edwards, 1983; Curtis, 1989). Basaltic flows of Berkeley Hills (Tv) were emplaced over terrestrial gravel of the Orinda Formation in what is now the Berkeley Hills while some lava flowed to the west over a low rolling topography underlain by the Franciscan Complex. Before the Hayward fault began to evolve, the Berkeley Hills Volcanics were covered by lacustrine and estuarine sediments of the Siesta Formation and equivalent sediments of the lower Petaluma Formation. Farther to the west, distal volcanics were covered by marine sediments of the older part of the Wilson Grove Formation (Twg). (B) Palinspastic reconstruction ca. 6 Ma. By this time nearly 20 km of displacement had occurred along the Hayward fault but the Petaluma and Contra Costa basins are still connected at what is now Point Pinole. To the west in Petaluma basin is the marine Wilson Grove Formation with the sand and gravel of Cotati (Tco) marking the shoreline. At 6.26 Ma the Roblar tuff was erupted from the San Pablo Bay area and deposited in the Wilson Grove sediments as well as in the Petaluma Formation and the Contra Costa basin. Much of the airfall Roblar was reworked into a fluvial system draining the Contra Costa and Petaluma basins and crossing the continental shelf on its way to the Delgada Fan in the deep ocean. Detritus containing siliceous Claremont Shale chips from outcrops of the Monterey Formation (Tmy) to the east were delivered to the Garrity Member of the Contra Costa Group, the middle part of the Petaluma Formation, and the sand and gravel of Cotati by this fluvial system. A northern extension of the Hayward fault, interpreted to be the Petaluma Valley fault (PVF) has accommodated some of the displacement of the Hayward fault. (C) Map of the present configuration of the Petaluma and Contra Costa basins. The middle Petaluma Formation (Tpm) and the Garrity Member of the Contra Costa Group (Tccg) are separated by >20 km. The connection between the Hayward and Rodgers Creek faults has been obscured by the opening of an extension pull-apart basin that is beneath San Pablo Bay. The middle part of the Petaluma Formation and the sand and gravel of Cotati that are particularly rich in Claremont Shale chips are the same color as the Garrity Member of the Contra Costa Group. The distribution of the Roblar tuff (Trt) is also shown.]()
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![Map modified from Langenheim et al. (2010) showing the study area, faults of the East Bay fault system, and their possible extensions north of San Pablo Bay. Also shown are northward-younging Cenozoic volcanic fields, some of which have been correlated across dextral faults of the East Bay fault system. Fault abbreviations: BF—Bloomfield; BMF—Burdell Mountain; FC—Franklin Canyon; CF—Carneros; M—Moraga; MC—Miller Creek; P—Palomares; PVF—Petaluma Valley; Pin—Pinole; Su—Sunol; TF—Tolay; WNF—West Napa.]()
![Aeromagnetic contours (white) on simplified geology. Contour interval = 50 nT. Aligned reddish-brown crosses are magnetization boundaries. Gray line is inferred location of the Petaluma Valley fault (PVF) from Graymer et al. (2002). Anomalies k and ne are discussed in text. Towns: C—Calistoga; Gl—Glen Ellen; Gv—Green Valley; H—Healdsburg; N—Napa; Oak—Oakmont; P—Petaluma; S—Sonoma; SR—Santa Rosa; StH—St. Helena; V—Vallejo; Y—Yountville. Faults: BVF—Bennett Valley; CaF—Carneros; GVF—Green Valley; HaF—Hayward; HF—Healdsburg; PiF—Pinole; RCF—Rodgers Creek; SCF—Soda Creek; TF—Tolay; WNF—West Napa; WSVF—West Sonoma Valley. Other features: BM—Burdell Mountain; Co—Cotati gravity low; dc—dike complex; MSH—Mount St. Helena; SoH—Sonoma Highlands; Su—Sugarloaf Ridge; TR—Trenton Ridge; W—Windsor gravity low; vc—volcanic center.]()
![Color-contoured aeromagnetic map of the North Bay region. Black dotted lines are extensions of faults derived from gravity. Black dashed line is extension of the Pinole fault based on basin thickness (Fig. 5). Anomalies k, m, n, ne, and o are discussed in the text. Gray line is inferred location of the Petaluma Valley fault (PVF) from Graymer et al. (2002). Blue-rimmed white circles are important wells. Towns: C—Calistoga; Gl—Glen Ellen; Gv—Green Valley; H—Healdsburg; N—Napa; Oak—Oakmont; P—Petaluma; S—Sonoma; SR—Santa Rosa; StH—St. Helena; V—Vallejo; Y—Yountville. Faults: BVF—Bennett Valley; CaF—Carneros; GVF—Green Valley; HaF—Hayward; HF—Healdsburg; PiF—Pinole; RCF—Rodgers Creek; SCF—Soda Creek; TF—Tolay; WNF—West Napa; WSVF—West Sonoma Valley. Other features: BM—Burdell Mountain; Co—Cotati gravity low; dc—dike complex; MSH—Mount St. Helena; SoH—Sonoma Highlands; Su—Sugarloaf Ridge; TR—Trenton Ridge; W—Windsor gravity low; vc—volcanic center.]()
![Geologic map of the study area (modified from Wagner and Bortugno, 1982) showing distribution of Miocene and younger sedimentary and volcanic rocks deposited during development of the Rodgers Creek–Maacama fault system. Tertiary rocks deposited prior to development of the San Andreas transform and northward passage of the Mendocino Triple Junction are also delineated. Mesozoic basement rocks west of the San Andreas fault are undivided, but east of the fault include the Coast Range Ophiolite, Great Valley Sequence and Mesozoic-Tertiary Franciscan Complex. Large white filled arrows show pattern of Miocene and Pliocene nonmarine to marine sediment transport. Basins (hachured) and bedrock ridge (not hachured) beneath the Santa Rosa Plain are shown with heavy gray line. Fault (F) and fault zone (FZ) abbreviations: BDFZ—Burdell Mountain; BF—Bloomfield; PV-PHFZ—Petaluma Valley–proto-Hayward; TF—Tolay; HF—Hayward; CNF—Concord; FRF—Franklin; GVFZ—Green Valley; CARF—Carneros; WNFZ—West Napa; CPFZ—Cooks Peak; TMFZ—Taylor Mountain; RCFZ—Rodgers Creek; HLDFZ—Healdsburg; BVFZ—Bennett Valley; LSRFZ—Laguna de Santa Rosa; SRF—Sanford Road; TRF—Trenton; MAFZ—Maacama; WCF—Wragg Canyon; CLYF—Collayomi; CPF—Childers Peak. ASP (blue) is Annadel State Park.]()
![Thickness of Cenozoic sedimentary and volcanic deposits from inversion of gravity data. Blue rimmed black circles are wells that are interpreted to have penetrated Franciscan Complex or ophiolitic rocks (basement). Brown crosses are selected wells that did not penetrate basement. Numbered wells: 1—Chevron Bethlehem No. 1; 2—General Crude Oil Cullinan No. 1; 3—Shell Company of Calif. Murphy No. 1; 4—Santa Rosa Exploration Co. Stephens-Rohnert No. 1; 5—Clarement Energy John Rice No. 1. Dashed white lines are projections of the Pinole (PiF) and Carneros (CaF) faults that form a right step; dotted white lines are extensions of faults from Figure 3. Gray line is inferred location of the Petaluma Valley fault (PVF) from Graymer et al. (2002). C—Calistoga; Gl—Glen Ellen; Gv—Green Valley; H—Healdsburg; N—Napa; P—Petaluma; S—Sonoma; SR—Santa Rosa; StH—St. Helena; V—Vallejo; Y—Yountville. Faults: BVF—Bennett Valley; CaF—Carneros; GVF—Green Valley; HaF—Hayward; HF—Healdsburg; MaF—Maacama; RCF—Rodgers Creek; SCF—Soda Creek; TF—Tolay; WNF—West Napa; WSVF—West Sonoma Valley. Gravity features: Be—Bellevue low; Co—Cotati; MH—Meacham Hill; MSH—Mount St. Helena; Oak—Oakmont low; SoH—Sonoma highlands; Su—Sugarloaf Ridge; TM—Taylor Mountain; TR—Trenton Ridge; W—Windsor low; WH—Warrington high.]()
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Tolay Volcanics
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Journal Article
Geology, geochronology, and paleogeography of the southern Sonoma volcanic field and adjacent areas, northern San Francisco Bay region, California Open Access
Journal: Geosphere
Publisher: Geological Society of America
Published: 01 June 2011
Geosphere (2011) 7 (3): 658–683.
... margin of San Pablo Bay, i.e., the Burdell Mountain Volcanics (11.1 Ma), the Tolay Volcanics (ca. 10–8 Ma), and the Sonoma Volcanics (ca. 8–2.5 Ma). The Burdell Mountain and the Tolay Volcanics are allochthonous, having been displaced from the Quien Sabe Volcanics and the Berkeley Hills Volcanics...
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Journal Article
Implications of the northwestwardly younger age of the volcanic rocks of west-central California Available to Purchase
Journal: GSA Bulletin
Publisher: Geological Society of America
Published: 01 May 1985
GSA Bulletin (1985) 96 (5): 647–654.
..., Pinnacles Volcanic Formation, Quien Sabe Volcanics, volcanic rocks in the Berkeley Hills, Tolay Volcanics, Sonoma Volcanics, and Clear Lake Volcanics. Dispersion in the age-distance relation is reduced by restoration of inferred offsets on transecting right-lateral fault systems. The offsets include 115 km...
Journal Article
Paleomagnetism and Potassium-Argon Ages of the Sonoma Volcanics, California Available to Purchase
Journal: GSA Bulletin
Publisher: Geological Society of America
Published: 01 July 1972
GSA Bulletin (1972) 83 (7): 2063–2072.
... ranges from 5.3 m.y. to about 2.9 m.y. Volcanic rocks approximately 11.8 m.y. old occur at Burdell Mountain northwest of Novato. This volcanic sequence is probably part of the Tolay Volcanics of the Petaluma area. PUBLICATION AUTHORIZED BY THE DIRECTOR, U.S. GEOLOGICAL SURVEY 12 12 1971...
Image
Simplified geology of the northern San Francisco Bay area showing the Sonom... Open Access
in Geology and geochemistry of volcanic centers within the eastern half of the Sonoma volcanic field, northern San Francisco Bay region, California
> Geosphere
Published: 01 June 2011
); CF—Calaveras fault; RCF—Rodgers Creek fault; TF—Tolay fault. BHV—volcanic rocks in the Berkeley Hills; BMV—Burdell Mountain Volcanics; TV—Tolay Volcanics; P—Pinole; R—Rodeo; V—Vallejo; WP—Wilson Point. Inset tectonic map shows the Cascadia subduction zone (CSZ), Mendocino fracture zone (MFZ
Image
Map showing volcanic fields, eruptive centers discussed in the text, and ma... Open Access
in Geology, geochronology, and paleogeography of the southern Sonoma volcanic field and adjacent areas, northern San Francisco Bay region, California
> Geosphere
Published: 01 June 2011
Figure 3. Map showing volcanic fields, eruptive centers discussed in the text, and major faults north of San Pablo Bay. The Burdell Mountain and Tolay Volcanics have been correlated across faults of the East Bay fault system ( Fig. 1 ). The Sonoma Volcanics have been subdivided into the western
Image
Aeromagnetic map filtered to enhance shallow sources. Magnetization boundar... Open Access
Published: 01 October 2010
Napa; WSVF—West Sonoma Valley. Other features: Co—Cotati gravity low; dc—dike complex; MSH—Mount St. Helena; SoH—Sonoma highlands; Su—Sugarloaf Ridge; TR—Trenton Ridge; TV—Tolay Volcanics; W—Windsor gravity low; vc—volcanic center.
Image
Aeromagnetic map filtered to enhance deep sources. Aligned red circles are ... Open Access
Published: 01 October 2010
St. Helena; SoH—Sonoma highlands; Su—Sugarloaf Ridge; TR—Trenton Ridge; TV—Tolay Volcanics; W—Windsor gravity low; vc—volcanic center.
Image
Aeromagnetic map filtered to enhance medium depth sources. Aligned red circ... Open Access
Published: 01 October 2010
Creek; WNF—West Napa; WSVF—West Sonoma Valley. Other features: BM—Burdell Mountain; Co—Cotati gravity low; dc—dike complex; MSH—Mount St. Helena; SoH—Sonoma highlands; Su—Sugarloaf Ridge; TR—Trenton Ridge; TV—Tolay Volcanics; W—Windsor gravity low; vc—volcanic center.
Image
A chart showing generalized stratigraphic relationships of Neogene units in... Open Access
in Geology, geochronology, and paleogeography of the southern Sonoma volcanic field and adjacent areas, northern San Francisco Bay region, California
> Geosphere
Published: 01 June 2011
), and the Putah Tuff (3.27–3.35 Ma). The Petaluma Formation is divided in a lower unit (Tpl), a middle unit (Tpm) (after Allen, 2003 ), and an upper unit (Tpu) based on this investigation. Other units are the marine Neroly Formation, Tolay Volcanics (Tov), Sonoma Volcanics undivided (Tsv), lower Sonoma (Tsvl
Journal Article
Geophysical framework of the northern San Francisco Bay region, California Open Access
Journal: Geosphere
Publisher: Geological Society of America
Published: 01 October 2010
Geosphere (2010) 6 (5): 594–620.
... Napa; WSVF—West Sonoma Valley. Other features: Co—Cotati gravity low; dc—dike complex; MSH—Mount St. Helena; SoH—Sonoma highlands; Su—Sugarloaf Ridge; TR—Trenton Ridge; TV—Tolay Volcanics; W—Windsor gravity low; vc—volcanic center. ...
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Journal Article
Are Petaluma Horse Teeth Reliable in Correlation? Available to Purchase
Journal: AAPG Bulletin
Publisher: American Association of Petroleum Geologists
Published: 01 October 1952
AAPG Bulletin (1952) 36 (10): 2011–2025.
... conformably on the Tolay volcanics of flows, breccias, tuffs, and agglomerates, and in turn is overlain unconformably by the Sonoma volcanics. The lithologic similarity of the Petaluma to the Orinda and parts of the Siesta formation in the Berkeley Hills has been emphasized by everyone who studied...
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Image
(A) Palinspastic reconstruction of Tolay and Berkeley Hills volcanic fields... Open Access
in Geology, geochronology, and paleogeography of the southern Sonoma volcanic field and adjacent areas, northern San Francisco Bay region, California
> Geosphere
Published: 01 June 2011
Figure 10. (A) Palinspastic reconstruction of Tolay and Berkeley Hills volcanic fields ca. 10 Ma or earlier. Magma rose along faults associated with the incipient Hayward fault zone ( Graham et al., 1984 ) and were erupted from the Round Top eruptive center ( Edwards, 1983 ; Curtis, 1989
Journal Article
Three-dimensional geologic modeling of the Santa Rosa Plain, California Open Access
Journal: Geosphere
Publisher: Geological Society of America
Published: 01 June 2010
Geosphere (2010) 6 (3): 237–274.
... and present within the basin fill include the 3–8 Ma Sonoma Volcanics, the 8.5–9.5 Ma Tolay Volcanics, and the 10.6–11.2 Ma Burdell Mountain Volcanics ( Wagner et al., 2005 ). The Sonoma Volcanics dominate the east side of the Santa Rosa Plain. These volcanic rocks are well exposed to the east of the Rodgers...
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Includes: Supplemental Content
Image
Map modified from Langenheim et al. (2010) showing the study area, faults... Open Access
in Geology, geochronology, and paleogeography of the southern Sonoma volcanic field and adjacent areas, northern San Francisco Bay region, California
> Geosphere
Published: 01 June 2011
Figure 1. Map modified from Langenheim et al. (2010) showing the study area, faults of the East Bay fault system, and their possible extensions north of San Pablo Bay. Also shown are northward-younging Cenozoic volcanic fields, some of which have been correlated across dextral faults
Image
Aeromagnetic contours (white) on simplified geology. Contour interval = 50 ... Open Access
Published: 01 October 2010
—Calistoga; Gl—Glen Ellen; Gv—Green Valley; H—Healdsburg; N—Napa; Oak—Oakmont; P—Petaluma; S—Sonoma; SR—Santa Rosa; StH—St. Helena; V—Vallejo; Y—Yountville. Faults: BVF—Bennett Valley; CaF—Carneros; GVF—Green Valley; HaF—Hayward; HF—Healdsburg; PiF—Pinole; RCF—Rodgers Creek; SCF—Soda Creek; TF—Tolay; WNF
Image
Color-contoured aeromagnetic map of the North Bay region. Black dotted line... Open Access
Published: 01 October 2010
—Bennett Valley; CaF—Carneros; GVF—Green Valley; HaF—Hayward; HF—Healdsburg; PiF—Pinole; RCF—Rodgers Creek; SCF—Soda Creek; TF—Tolay; WNF—West Napa; WSVF—West Sonoma Valley. Other features: BM—Burdell Mountain; Co—Cotati gravity low; dc—dike complex; MSH—Mount St. Helena; SoH—Sonoma Highlands; Su—Sugarloaf
Image
Geologic map of the study area (modified from Wagner and Bortugno, 1982 ) ... Open Access
in Evolution of the Rodgers Creek–Maacama right-lateral fault system and associated basins east of the northward-migrating Mendocino Triple Junction, northern California
> Geosphere
Published: 01 April 2012
Figure 2. Geologic map of the study area (modified from Wagner and Bortugno, 1982 ) showing distribution of Miocene and younger sedimentary and volcanic rocks deposited during development of the Rodgers Creek–Maacama fault system. Tertiary rocks deposited prior to development of the San Andreas
Image
Thickness of Cenozoic sedimentary and volcanic deposits from inversion of g... Open Access
Published: 01 October 2010
Figure 5. Thickness of Cenozoic sedimentary and volcanic deposits from inversion of gravity data. Blue rimmed black circles are wells that are interpreted to have penetrated Franciscan Complex or ophiolitic rocks (basement). Brown crosses are selected wells that did not penetrate basement
Journal Article
Geology and geochemistry of volcanic centers within the eastern half of the Sonoma volcanic field, northern San Francisco Bay region, California Open Access
Journal: Geosphere
Publisher: Geological Society of America
Published: 01 June 2011
Geosphere (2011) 7 (3): 629–657.
... ); CF—Calaveras fault; RCF—Rodgers Creek fault; TF—Tolay fault. BHV—volcanic rocks in the Berkeley Hills; BMV—Burdell Mountain Volcanics; TV—Tolay Volcanics; P—Pinole; R—Rodeo; V—Vallejo; WP—Wilson Point. Inset tectonic map shows the Cascadia subduction zone (CSZ), Mendocino fracture zone (MFZ...
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Includes: Supplemental Content
Journal Article
Evolution of the Rodgers Creek–Maacama right-lateral fault system and associated basins east of the northward-migrating Mendocino Triple Junction, northern California Open Access
Journal: Geosphere
Publisher: Geological Society of America
Published: 01 April 2012
Geosphere (2012) 8 (2): 342–373.
...Figure 2. Geologic map of the study area (modified from Wagner and Bortugno, 1982 ) showing distribution of Miocene and younger sedimentary and volcanic rocks deposited during development of the Rodgers Creek–Maacama fault system. Tertiary rocks deposited prior to development of the San Andreas...
FIGURES
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