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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Africa
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Southern Africa
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Kaapvaal Craton (1)
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Asia
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Primary terms
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Oligocene
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Paleocene
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Central America
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Chordata
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Diapsida
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phonolites (1)
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Invertebrata
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Mollusca
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Cephalopoda
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Gastropoda (4)
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Protista
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Foraminifera
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Fusulinina
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Fusulinidae (1)
-
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Rotaliina
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Globigerinacea
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Neogloboquadrina
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Neogloboquadrina pachyderma (1)
-
-
-
-
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Radiolaria (4)
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isotopes
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stable isotopes
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Mesozoic
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Alisitos Formation (2)
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Albian
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upper Albian (1)
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Aptian (1)
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Mural Limestone (1)
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Middle Cretaceous (2)
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Upper Cretaceous
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Ladd Formation (2)
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Rosario Formation (2)
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Williams Formation (1)
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Franciscan Complex (1)
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Jurassic
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Coast Range Ophiolite (1)
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Middle Jurassic
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Bathonian (1)
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Upper Jurassic
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Kimmeridgian (1)
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Naknek Formation (1)
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lower Mesozoic (1)
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Orocopia Schist (1)
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mineral deposits, genesis (2)
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Peninsular Ranges Batholith (2)
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ocean basins (1)
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Leg 167
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ODP Site 1012 (1)
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ODP Site 1017 (1)
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ODP Site 1018 (1)
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ODP Site 1019 (1)
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ODP Site 1020 (1)
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Cedros Island
Tectonic history of a Jurassic backarc-basin sequence (the Gran Cañon Formation, Cedros Island, Mexico), based on compositional modes of tuffaceous deposits
Mid-Cretaceous crustal extension recorded in deep-marine half-graben fill, Cedros Island, Mexico
Remagnetization and northward translation of Mesozoic red chert from Cedros Island and the San Benito Islands, Baja California, Mexico: Discussion and reply
Remagnetization and northward translation of Mesozoic red chert from Cedros Island and the San Benito Islands, Baja California, Mexico
Evolution of a Middle Jurassic back-arc basin, Cedros Island, Baja California: Evidence from a marine volcaniclastic apron
Comment and Reply on “Geodynamic significance of Late Triassic to Early Cretaceous volcanic sequences of Vizcaino Peninsula and Cedros Island, Baja California, Mexico”: COMMENT
Comment and Reply on “Geodynamic significance of Late Triassic to Early Cretaceous volcanic sequences of Vizcaino Peninsula and Cedros Island, Baja California, Mexico”: REPLY
Geodynamic significance of Late Triassic to Early Cretaceous volcanic sequences of Vizcaino Peninsula and Cedros Island, Baja California, Mexico
Figure 1. Generalized geologic map of Cedros Island (modified from Kilmer,...
Lithology and biostratigraphy of Franciscan-like chert and associated rocks in west-central Baja California, Mexico
Late Quaternary Biostratigraphy of Cores from Beneath California Current: ABSTRACT
Jurassic sedimentary mélange and associated facies, Baja California, Mexico
The P-T-t history of blocks in serpentinite-matrix mélange, west-central Baja California
NEW CRETACEOUS CERITHIFORM GASTROPODS FROM THE PACIFIC SLOPE OF NORTH AMERICA
Significance of pectinids in Tertiary biochronology of the Pacific Northwest
Range zones of pectinid bivalves provide a principal means of age determination and correlation of shallow-water, inshore facies of middle and late Tertiary marine basins of Oregon and Washington. During the Paleogene, pectinids were represented by a few species of Chlamys, Vertipecten, and some thin-shelled deep-water mud pectens of the Eburneopecten and Amusium groups. Neogene pectinids are much more numerous than Paleogene species in this region, although in each case, taxonomic diversity is far lower than in the warmer-water Neogene faunas of coastal California to the south. Giant pectinids, species that regularly attain at least 90 mm in diameter, appear near the Oligocene-Miocene boundary. Range zones of giant pectinids are useful in provincial age determination and correlation of marine Neogene strata in Oregon, Washington, and coastal British Columbia: Vertipecten fucanus (Dall)—lower lower Miocene (Pillarian Stage); Patinopecten propatulus (Conrad)—upper lower Miocene to middle Miocene (Newportian Stage); Patinopecten oregonensis (Howe)—lower upper Miocene (Wishkahan Stage); Yabepecten condoni (Hertlein)—upper upper Miocene (Graysian Stage); and Lituyapecten dilleri (Dall)—Pliocene (Moclipsian Stage). Certain widespread species facilitate interprovincial correlation between the California Neogene molluscan province, to the south, and the Gulf of Alaska Neogene molluscan province, to the north. Vertipecten fucanus, an early Miocene species, ranged southward to southern California and northward to the head of the Gulf of Alaska. Leptopecten andersoni (Arnold), a late early Miocene to middle Miocene species, ranged southward to Baja California Sur. Lituyapecten dilleri (Dall) ranged northward to near the head of the Gulf of Alaska and southward to Cedros Island, off Baja California, Mexico, during the Pliocene.