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Mariposa Formation

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Series: GSA Special Papers
Published: 01 July 2008
DOI: 10.1130/2008.2438(11)
... New single-grain detrital zircon U-Pb age data from sandstone lenses in the Upper Jurassic Mariposa Formation of the Sierra Nevada foothills metamorphic belt indicate that: (1) the earliest phase of clastic sedimentation mainly involved material derived from the Bragdon and Baird Formations...
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MAJOR, MINOR, AND TRACE ELEMENT COMPOSITIONS OF <b>MARIPOSA</b> <b>FORMATION</b> AND CALA...
in > Geosphere
Published: 01 April 2012
TABLE 4. MAJOR, MINOR, AND TRACE ELEMENT COMPOSITIONS OF MARIPOSA FORMATION AND CALAVERAS COMPLEX WALL ROCKS
Journal Article
Journal: GSA Bulletin
Published: 01 October 1985
GSA Bulletin (1985) 96 (10): 1322–1331.
... that plunges gently southeastward, exposing the Upper Jurassic Mariposa Formation on its limbs. The Jasper Point Formation consists of >900 m of massive, pillowed, and brecciated basalt overlain by as much as 100 m of varicolored radiolarian chert; these units resemble layers 2 and 1 of the oceanic crust...
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Emsian crinoids from the <b>Mariposas</b> <b>Formation</b> (NE, Spain). ( 1–3 ). Calyx an...
Published: 01 November 2019
Figure 3. Emsian crinoids from the Mariposas Formation (NE, Spain). ( 1–3 ). Calyx and arms of Camerata indet.; specimen MPZ2018/518; ( 1 ) lateral view showing two articulated pinnulate arms; ( 2 ) lateral view showing a prominent spine on the tegmen; ( 3 ) lateral view showing arm articulations
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Plate diagrams of <b>Mariposas</b> <b>Formation</b> crinoids. ( 1 ) Lateral view of  Plat...
Published: 01 November 2019
Figure 4. Plate diagrams of Mariposas Formation crinoids. ( 1 ) Lateral view of Platyhexacrinus santacruzensis n. sp. calyx with primibrachials and two secundibrachials preserved in one ray; compare to Figure 3.5 ; scale bar, 1 mm (MPZ2018/514). ( 2, 3 ) Eucladid Indeterminate; compare
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Figure  6 — Paralejurus carlsi  n. sp., <b>Mariposas</b> <b>Formation</b>, Lower Emsian f...
Published: 01 July 2004
Figure 6 — Paralejurus carlsi n. sp., Mariposas Formation, Lower Emsian from Cámaras River and Andrea section, Iberian Chains, Spain. 9 – 11 , Holotype, pygidium, MPZ 01, lateral, dorsal, and posterior views, ×2.0; 1, cranidium, MPZ 04, dorsal view, partly exfoliated, ×1.9; 2, cephalon
Journal Article
Journal: GSA Bulletin
Published: 01 January 2008
GSA Bulletin (2008) 120 (1-2): 179–194.
... and deformation of the outboard Upper Jurassic Galice and Mariposa formations. Klamath-Sierran terrane assemblies reflect ∼230 m.y. of transpression-transtension involving only minor episodes of subduction, producing ubiquitous ophiolite-chert-argillite lithologies and rare felsic arc rocks. In contrast, the Late...
FIGURES | View All (8)
Series: GSA Memoirs
Published: 01 January 2014
DOI: 10.1130/2014.1211(19)
... Mariposa Formation of the western Sierra Nevada Foothills is a good analog. Results of detrital zircon U/Pb dating from an exposure of continentally derived sandstone at Lusardi Creek are consistent with a mixed volcanic-continental provenance for the Peñasquitos Formation. A weighted mean U/Pb age...
Journal Article
Journal: GSA Bulletin
Published: 01 July 2007
GSA Bulletin (2007) 119 (7-8): 1014–1024.
... to brecciated flows of augite-phyric basalt. The Peñon Blanco Formation is paraconformably overlain by the Oxfordian-Kimmeridgian Mariposa Formation, which provides a minimum age of juxtaposition for the Peñon Blanco arc against the inboard Calaveras Complex. New geochemical data from the Peñon Blanco arc...
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Journal Article
Journal: Economic Geology
Published: 01 April 1987
Economic Geology (1987) 82 (2): 328–344.
... among the vein minerals.Observations from the Oro Rico and McAlpine mines, Coulterville district, indicate that these deposits were subjected to deformation during and after their formation. Fluid inclusions in the milky vein quartz exhibit only a narrow range in T (sub m ice ) but a large range in T h...
Book Chapter

Author(s)
Ralph D. Reed
Series: AAPG Special Publication, AAPG Special Publication
Published: 01 January 1933
DOI: 10.1306/SV5333SP336C5
EISBN: 9781629812526
..., Bicknell, Hinchman, and Thompson formations (Taylorsville region), and Mariposa formation (Mother Lode district). The stages represented are Lower, Middle, and Upper Jurassic; the beds are dark shale, tuffaceous sandstone, and other types. 2 Lower Jurassic rocks are found at Redding and Taylorsville...
Series: GSA Special Papers
Published: 01 January 2006
DOI: 10.1130/2006.2410(02)
... is represented by the deposition of the siliciclastic turbidite of the Monte del Oro and Mariposa Formations (Foothills terrane, western Sierra Nevada) and by that of the Galice Formation sensu stricto (Rogue Valley subterrane). The terrane concept was first advanced by W. Porter Irwin (U.S...
FIGURES | View All (14)
Journal Article
Published: 01 November 2019
Journal of Paleontology (2019) 93 (6): 1159–1174.
...Figure 3. Emsian crinoids from the Mariposas Formation (NE, Spain). ( 1–3 ). Calyx and arms of Camerata indet.; specimen MPZ2018/518; ( 1 ) lateral view showing two articulated pinnulate arms; ( 2 ) lateral view showing a prominent spine on the tegmen; ( 3 ) lateral view showing arm articulations...
FIGURES | View All (6)
Series: GSA Special Papers
Published: 01 December 2015
DOI: 10.1130/2015.2513(08)
... on timing of Nevadan deformation is set by the 151–153 Ma Guadelupe pluton, which postdates and intruded a large-scale megafold and cleavage within the Mariposa Formation. Detailed structure throughout the Western Sierra Nevada metamorphic province shows that all Late Jurassic deformation relates to east...
Journal Article
Published: 01 May 2014
Journal of Paleontology (2014) 88 (3): 421–433.
... Jurassic diademataceans have been described previously from North America. We describe a new genus and species, Sierradiadema kristini , from a single fossil from the Middle Jurassic (Callovian) Colfax sequence of the Mariposa Formation exposed in the Middle Fork American River drainage of the northern...
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Series: GSA Special Papers
Published: 01 January 2006
DOI: 10.1130/2006.2410(18)
... sedimentary strata interlayered with 200-Ma mafic volcanic-plutonic arc rocks, all resting on a 300-Ma ophiolitic basement; suturing against the structurally higher Mariposa Formation took place after deformation of the latter at ca. 150 Ma. (5) The Slate Creek complex, and possibly the Lake Combie, Owl Gulch...
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Series: DNAG, Geology of North America
Published: 01 January 1989
DOI: 10.1130/DNAG-GNA-N.111
EISBN: 9780813754659
... morphotectonic element of the ocean basins (Ewing and Heezen, 1956; Heezen, 1957). Models of ridge formation proposed that the ridge axis was the site of extension, stretching, and volcanism (Heezen, 1960; Menard, 1960; Hess, 1962). The long, straight scars of the fracture zones that frequently offset the axis...
Series: DNAG, Geology of North America
Published: 01 January 1989
DOI: 10.1130/DNAG-GNA-N.145
EISBN: 9780813754659
... basalts play an important role in constraining models of mantle convection, continent formation, and related questions. This chapter describes the petrologic and geochemical characteristics of lavas from the axes of East Pacific spreading ridges, primarily the East Pacific Rise (EPR) between the Tamayo...
Series: DNAG, Geology of North America
Published: 01 January 1989
DOI: 10.1130/DNAG-GNA-N.161
EISBN: 9780813754659
... as well as the formation of some transient microplates. The hypothesis provides a mechanistic explanation for the way in which many (if not all) spreading center jumps occur and why they occur in systematic patterns, how spreading centers reorient when the direction of sea-floor spreading changes...
Series: DNAG, Geology of North America
Published: 01 January 1989
EISBN: 9780813754659
..., but others may originate on old lithosphere far from active ridge crests. Oceanic volcanoes of non-hotspot character are almost certainly of several types, inasmuch as there are many tectonic environments in which a favorable combination of magma availability and plumbing systems can lead to the formation...