Major right-lateral faulting in the Franciscan assemblage of northern California in late Tertiary time

Kelsey, Harvey M.; Hagans, Danny K.

doi:10.1130/0091-7613(1982)10<387:mrfitf>2.0.co;2

Cited by 21 publications

(10 citation statements)

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“…In an exposure near Prairie Creek, observed by J.C. Young in 1972 (exposure now overgrown), the Grogan fault is a high-angle reverse fault along which Pliocene and Pleistocene sediments are juxtaposed against Franciscan rocks. Although no unequivocal evidence exists for lateral movement on the Grogan fault, Kelsey and Hagans (1982) presented arguments for a minimum of 75 km of right-lateral displacement on the Grogan fault, probably during late Tertiary time.…”

Section: Grogan Fault and Associated Structuresmentioning

confidence: 98%

“…Some of the blocks are rock types exotic to the Redwood Creek basin and appear to have been emplaced in their present positions during faulting. Although all major faults strike northwest, they exhibit a range of orientations from shallowly dipping to vertical, and they represent several different deformational episodes (Monsen and Aalto, 1980;Kelsey and Hagans, 1982).…”

Section: Structurementioning

confidence: 99%

“…The Grogan fault can be traced 28 km southeast of the Redwood Creek basin by its geomorphic expression, and it may extend even farther south (Kelsey and Hagans, 1982). A fault that may be the northwestern extension of the Grogan fault can be traced in offshore reflection profiles (Field and others, 1980).…”

Section: Grogan Fault and Associated Structuresmentioning

confidence: 99%

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Geomorphic processes and aquatic habitat in the Redwood Creek basin, northwestern California

Nolan¹,

Kelsey²,

Marron³

1995

Professional Paper

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Section: Grogan Fault and Associated Structuresmentioning

confidence: 98%

Section: Structurementioning

confidence: 99%

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Geomorphic processes and aquatic habitat in the Redwood Creek basin, northwestern California

Nolan¹,

Kelsey²,

Marron³

1995

Professional Paper

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“…Creek Schist (Kelsey and Hagans, 1982;Cashman et al, 1986), exposed as a N-S-trending belt 70 km long and 10 km wide, is separated by faults from the surrounding Franciscan Com plex. The protolith (subduction complex), metamorphic-facies series (jadeite-glaucophane type), and radiometric age are remarkably similar to the South Fork Mountain Schist (clustered at 115 to 120 Ma) and Colebrooke Schist (whole-rock K-Ar dates of 130 to 145 Ma by Dott, 1965; an Rb-Sr whole-rock isochron age of 128 Ma by Coleman, 1972).…”

Section: Redwood Creek Blueschist the Redwoodmentioning

confidence: 99%

Blueschists and Eclogites of the World and Their Exhumation

Maruyama

Liou

Terabayashi

1996

International Geology Review

581

364

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“…Accretionrelated deformation has resulted in pervasive fracturing of Franciscan rocks and localized development of large contractional faults and folds. Subsequent to the formation of the subduction complex, Franciscan rocks have been translated to the north along regional Cenozoic strike-slip faults (Kelsey & Hagans, 1982; Franciscan terranes Franciscan Western Jurassic Pickett Pk. terrane…”

Section: Introductionmentioning

confidence: 99%

Franciscan Complex olistostrome at Crescent City, northern California

Aalto

1989

Sedimentology

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An olistostrome and bounding turbidites are exposed within the late Mesozoic Franciscan Complex along the Crescent City (California) coastline. Facies grade in character from Mutti & Ricci Lucchi (1978) mixed facies B, C and D, to F (the olistostrome), to mixed A, B and E, progressing upwards within the Franciscan stratigraphic section. The facies F unit outcrop is up to 600 m thick and extends 12 km along strike. It consists of oblate to tabular blocks, up to 200 m in maximum dimension, of greenstone, tonalite, radiolarian chert, limestone, phyllite and greywacke dispersed in a scaly argillite matrix. The olistostromal origin of the unit is indicated by depositional contacts with bounding turbidites, by the presence of abundant recycled sedimentary clasts within the unit, and by the presence of sedimentary breccias and associated dismembered, slump‐folded turbidites both within the olistostrome and among subjacent turbidites. Sandstones are chiefly feldspathic litharenites that were very likely derived from the partially dissected, late Mesozoic Sierran‐Klamath magmatic are. Franciscan rocks record an early pervasive, layer‐parallel flattening strain in such features as extensional faults, necking and pinch‐and‐swell structures. Several scales of extensional faulting account for the juxtaposition of turbidites of different facies and/or with varying degrees of stratal disruption, the formation of sandstone lozenges, and the formation of scaly foliation in the olistostrome matrix. The latter resulted from the juxtaposition of lenticles with varying concentrations of silt and clay. These were ultimately derived from the finer divisions of turbidite beds that were incorporated into the olistostrome. The presence of gradational contacts between some sandstone olistoliths and the olistostrome matrix, and of sandstone dykes that intrude fractures and associated drag‐folded turbidite beds indicate that Franciscan sediments were not lithified during their early deformation. These sediments were deposited in either a trench or trench slope basin, and were first deformed either by gravity collapse of the trench slope cover or, less likely, by vertical loading beneath the toe of the accretionary wedge. They later were folded during internal shortening of the growing Franciscan accretionary prism.

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Major right-lateral faulting in the Franciscan assemblage of northern California in late Tertiary time

Cited by 21 publications

References 0 publications

Geomorphic processes and aquatic habitat in the Redwood Creek basin, northwestern California

Geomorphic processes and aquatic habitat in the Redwood Creek basin, northwestern California

Blueschists and Eclogites of the World and Their Exhumation

Franciscan Complex olistostrome at Crescent City, northern California

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