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Rancho Placeritos Mexico

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Series: GSA Special Papers
Published: 01 July 2008
DOI: 10.1130/2008.442(05)
... continental shelf (Rancho Placeritos), and offshelf continental rise (Rancho Los Chinos). Ages of Devonian brachiopod faunas include middle Early (Pragian) at Rancho Placeritos in west-central Sonora, late Middle (Givetian) at Cerros de Los Murciélagos in northwestern Sonora, and late Late (Famennian...
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... Ordovician rocks are exposed in the Rancho Placeritos area (Figures 2 , 4 ) ( Poole et al., 2000 ). These include the upper part of the Pozo Nuevo limestone (Middle Ordovician), the Middle Ordovician quartzite of Peña Blanca, and an unnamed Upper Ordovician limestone unit. Like the Sierra López section...
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Series: GSA Special Papers
Published: 01 January 2007
DOI: 10.1130/2007.2422(07)
...—Sierra de López; SST—Sierra Santa Teresa; BA—Aconchi batholith; PS—Sierra Pozos Serna; LF—Sierra La Flojera; RP—Rancho Placeritos; SAz—Sierra Azul; SV—Sierra la Víbora; CBA—Cerro la Basura; BM—Baboquivari Mountains; MSM—Mojave-Sonora megashear. The Jurassic sequence is well exposed at Sierra del...