Geologic map of the Monterey and Seaside 7.5-minute quadrangles, Monterey County, California: A digital database

Clark, Joseph D.; Dupré, W.R.; Rosenberg, Lewis I.

doi:10.3133/ofr9730

Cited by 7 publications

(7 citation statements)

References 15 publications

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“…3B for location; southeast edge adjoins northwest edge of Fig. 7) adapted after Trask (1926), Reiche (1937), Fiedler (1944), Compton (1960Compton ( , 1966, Wiebe (1966), Dibblee (1976Dibblee ( , 1979Dibblee ( , 1999, Graham (1976aGraham ( , 1976bGraham ( , 1979, Ross (1976aRoss ( , 1976bRoss ( , 1984, Ruetz (1979), Seiders et al (1983), Seiders and Joyce (1984), McCulloch and Greene (1990), Clark et al (1997Clark et al ( , 2000, Eittreim et al (2000Eittreim et al ( , 2002, Rosenberg (2001), Greene et al (2002), Wagner et al (2003) Figure 6. San Gregorio-Hosgri fault (SG-H) and associated fault strands of the Point Sur-Big Sur area (see Fig.…”

Section: Big Sur Segmentmentioning

confidence: 99%

“…Structural and stratigraphic relations of pre-late Quaternary strata exposed from the Monterey Peninsula through the Tularcitos saddle (Carmel River-Arroyo Seco divide) between the main Santa Lucia Range and its Sierra de Salinas spur (see Fig. 3B for location) adapted after Brown (1962), Neel (1963), Wiedmann (1964), Bowen (1965), Hickman (1968), Graham (1976a), Clark et al (1997Clark et al ( , 2000, Dibblee (1999), Rosenberg (2001), andWagner et al (2003). See Table 2 for previous stratigraphic nomenclature of presently unnamed (Clark et al, 1997(Clark et al, , 2000 Middle Miocene sandstone units (sub-Monterey) in various informally designated facies tracts (Carmel and Paloma facies depicted within base of Monterey Formation for reasons of scale).…”

Section: Tularcitos Saddlementioning

confidence: 99%

“…3B for location) adapted after Brown (1962), Neel (1963), Wiedmann (1964), Bowen (1965), Hickman (1968), Graham (1976a), Clark et al (1997Clark et al ( , 2000, Dibblee (1999), Rosenberg (2001), andWagner et al (2003). See Table 2 for previous stratigraphic nomenclature of presently unnamed (Clark et al, 1997(Clark et al, , 2000 Middle Miocene sandstone units (sub-Monterey) in various informally designated facies tracts (Carmel and Paloma facies depicted within base of Monterey Formation for reasons of scale). Oligocene basalt (to basaltic andesite) exposures dated as 27.0 ± 0.8 Ma at locality AP by Clark et al (1984Clark et al ( , 1997 (Graham, 1976a(Graham, , 1978.…”

Section: Tularcitos Saddlementioning

confidence: 99%

“…See Table 2 for previous stratigraphic nomenclature of presently unnamed (Clark et al, 1997(Clark et al, , 2000 Middle Miocene sandstone units (sub-Monterey) in various informally designated facies tracts (Carmel and Paloma facies depicted within base of Monterey Formation for reasons of scale). Oligocene basalt (to basaltic andesite) exposures dated as 27.0 ± 0.8 Ma at locality AP by Clark et al (1984Clark et al ( , 1997 (Graham, 1976a(Graham, , 1978. The Tularcitos fault was once thought to continue westward down Carmel Valley to the mouth of the Carmel River (Bowen, 1965), but is now known to link with the Navy fault of the Monterey Bay fault zone (Fig.…”

Section: Tularcitos Saddlementioning

confidence: 99%

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Net dextral slip, Neogene San Gregorio–Hosgri fault zone, coastal California: Geologic evidence and tectonic implications

Dickinson

Ducea

Rosenberg³

et al. 2005

Net Dextral Slip, Neogene San Gregorio-Hosgri Fault Zone, Coastal California: Geologic Evidence and Tectonic Implications

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103

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Reinterpretation of onshore and offshore geologic mapping, examination of a key offshore well core, and revision of cross-fault ties indicate Neogene dextral strike slip of 156 ± 4 km along the San Gregorio-Hosgri fault zone, a major strand of the San Andreas transform system in coastal California. Delineating the full course of the fault, defi ning net slip across it, and showing its relationship to other major tectonic features of central California helps clarify the evolution of the San Andreas system. San Gregorio-Hosgri slip rates over time are not well constrained, but were greater than at present during early phases of strike slip following fault initiation in late Miocene time. Strike slip took place southward along the California coast from the western fl ank of the San Francisco Peninsula to the Hosgri fault in the offshore Santa Maria basin without signifi cant reduction by transfer of strike slip into the central California Coast Ranges. Onshore coastal segments of the San Gregorio-Hosgri fault include the Seal Cove and San Gregorio faults on the San Francisco Peninsula, and the Sur and San Simeon fault zones along the fl ank of the Santa Lucia Range. Key cross-fault ties include porphyritic granodiorite and overlying Eocene strata exposed at Point Reyes and at Point Lobos, the Nacimiento fault contact between Salinian basement rocks and the Franciscan Complex offshore within the outer Santa Cruz basin and near Esalen on the fl ank of the Santa Lucia Range, Upper Cretaceous (Campanian) turbidites of the Pigeon Point Formation on the San Francisco Peninsula and the Atascadero Formation in the southern Santa Lucia Range, assemblages of Franciscan rocks exposed at Point Sur and at Point San Luis, and a lithic assemblage of Mesozoic rocks and their Tertiary cover exposed near Point San Simeon and at Point Sal, as restored for intrabasinal deformation within the onshore Santa Maria basin. Slivering of the Salinian block by San Gregorio-Hosgri displacements elongated its northern end and offset its western margin delineated by the older Nacimiento fault, a sinistral strike-slip fault of latest Cretaceous to Paleocene age. North of its juncture with the San Andreas fault, dextral slip along the San Gregorio-Hosgri fault augments net San Andreas displacement. Alternate restorations of the Gualala block imply that nearly half the net San Gregorio-Hosgri slip was accommodated along the offshore Gualala fault strand lying west of the Gualala block, which is bounded on the east by the current master trace of the San Andreas fault. With San Andreas and San Gregorio-Hosgri slip restored, there remains an unresolved proto-San Andreas mismatch of ~100 km between the offset northern end of the Salinian block and the southern end of the Sierran-Tehachapi block. On the south, San Gregorio-Hosgri strike slip is transposed into crustal shortening associated with vertical-axis tectonic rotation of fault-bounded crustal panels that form the western Transverse Ranges, and with kinematically linked deformation within the adja...

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Section: Big Sur Segmentmentioning

confidence: 99%

Section: Tularcitos Saddlementioning

confidence: 99%

Section: Tularcitos Saddlementioning

confidence: 99%

Section: Tularcitos Saddlementioning

confidence: 99%

See 2 more Smart Citations

Net dextral slip, Neogene San Gregorio–Hosgri fault zone, coastal California: Geologic evidence and tectonic implications

Dickinson

Ducea

Rosenberg³

et al. 2005

Net Dextral Slip, Neogene San Gregorio-Hosgri Fault Zone, Coastal California: Geologic Evidence and Tectonic Implications

Self Cite

103

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“…Subsequent inter‐basin and intra‐basin correlations are consistent with this origin for the later [e.g., Dupré , 1990; Dupré and Tinsley , 1980; Greene , 1977]. The SVA may unconformably contact older transgressive clays within the Salinas Valley locally, due to tectonic downwarping and Wisconsin‐age valley incision by the Salinas River [ Tinsley , 1975], but the age of a stratigraphically equivalent layer at former Fort Ord remains unclear [e.g., Dupré and Tinsley , 1980; Clark et al , 1997].…”

Section: Geologic and Hydrologic Settingmentioning

confidence: 92%

Implications of geometry, age and depositional history of a shallow confining layer in a coastal groundwater basin, Monterey County, California, USA

Erskine

Fisher

2002

Geophysical Research Letters

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We mapped the geometry of a shallow confining layer within the Salinas Valley aquifer system, northern Monterey County, California, using indicator geostatistics. The confining layer was previously interpreted to be mainly Holocene in age, having been deposited as a single unit during post‐Wisconsin sea‐level rise. We interpret this layer in our field area to be associated with Isotope Stages 5 (84–121 kyr) based on three independent arguments: layer geometry, with three distinct clay units rather than one; 14C analyses of peat samples; and consideration of required rates of coastal uplift. The complex stratigraphy of the confining layer likely resulted from deposition over existing topography, erosion during exposure, and uplift during three intervals of sea level rise and fall. Similarly complex layering may occur in other coastal basins, influencing groundwater resource development, remediation and protection in these settings.

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Sediment distribution and transport along a rocky, embayed coast: Monterey Peninsula and Carmel Bay, California

Storlazzi

Field

2000

Marine Geology

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Geologic map of the Monterey and Seaside 7.5-minute quadrangles, Monterey County, California: A digital database

Cited by 7 publications

References 15 publications

Net dextral slip, Neogene San Gregorio–Hosgri fault zone, coastal California: Geologic evidence and tectonic implications

Net dextral slip, Neogene San Gregorio–Hosgri fault zone, coastal California: Geologic evidence and tectonic implications

Implications of geometry, age and depositional history of a shallow confining layer in a coastal groundwater basin, Monterey County, California, USA

Sediment distribution and transport along a rocky, embayed coast: Monterey Peninsula and Carmel Bay, California

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