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herradura

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Journal Article
Published: 01 July 2001
Micropaleontology (2001) 47 (3): 257–267.
...Masako Ibaraki Abstract A well-exposed sequence of the Caleta Herradura de Mejillones section on the Pacific coast of northern Chile includes horizons of planktonic foraminiferal Zones N7 to N17 of Early to Late Miocene age. Successive appearances of species of the Praeorbulina-Orbulina lineage...
Series: Society of Economic Geologists Guidebook Series, Society of Economic Geologists Guidebook Series
Published: 01 January 1998
DOI: 10.5382/GB.30
EISBN: 9781934969830
... Abstract The journey begins at Caborca and heads northwest to La Herradura mine located 30 km west of México 2 highway. This mine began gold production in April, 1998, and structurally controlled mineralization is hosted by Proterozoic gneisses. Thereafter, the route returns to the paved road...
Series: Society of Economic Geologists Guidebook Series, Society of Economic Geologists Guidebook Series
Published: 01 January 1998
DOI: 10.5382/GB.30
EISBN: 9781934969830
... Abstract La Herradura is a structurally controlled gold deposit located in northwest Sonora, México. Minera Penmont, S. A. de C. V., a joint venture between Servicios Industriales Peñoles, S. A. de C. V., and Newmont Gold Company manage the project. In 1989 regional exploration led the Penmont...
Journal Article
Journal: GSA Bulletin
Published: 01 October 1971
GSA Bulletin (1971) 82 (10): 2949–2954.
...JERRY M HOFFER Abstract Lava ridges which are horseshoe-shaped in plan occur on the flanks of several volcanic cones in the La Mesa Basalts, Quaternary alkaline olivine basalts in south-central New Mexico. I propose to call these newly described features herradura (Spanish: horseshoe). They formed...
Journal Article
Published: 28 January 2019
Quarterly Journal of Engineering Geology and Hydrogeology (2019) 52 (2): 208–219.
...G. J. Hearn Abstract The geology of the Betic Cordillera has inspired national and international interest since the first half of the 19th century and structural and tectonic models continue to be refined. The coastal mountain ranges between Nerja and La Herradura expose rocks of the internal...
FIGURES | View All (18)
Journal Article
Journal: Economic Geology
Published: 01 September 2017
Economic Geology (2017) 112 (6): 1509–1529.
... from northwestern Mexico into the southwestern United States. The Caborca orogenic gold belt includes a number of deposits currently in production (e.g., La Herradura, San Francisco-Llano, El Chanate, Soledad-Dipolos, and Noche Buena) that, combined, contain gold reserves and resources of over 10...
FIGURES | View All (11)
Journal Article
Published: 01 February 1996
Bulletin of the Seismological Society of America (1996) 86 (1A): 19–31.
... at very shallow depth and with tectonic features at greater depth. We find low velocities (4.0 to 4.8 km/sec) in the shallow crust (above 10 km) near the active volcanoes and associated with a NW-SE trending late Cretaceous to late Tertiary sedimentary basin southeast of Herradura peninsula. High...
Image
Early Eocene diagenetically altered radiolarians from the San Pedrillo and ...
Published: 01 May 2007
PLATE 1 Early Eocene diagenetically altered radiolarians from the San Pedrillo and Herradura Block, Costa Rica. Scale bar indicates 100μm. 1–7 Buryella clinata Foreman. GDM 90126, Punta Agujitas. 7, Buryella clinata holotype scanned from Foreman (1973) . 8 Dictyoprora mongolfieri
Image
(A) Simplified regional scale cross section from the subducting Cocos plate...
Published: 01 July 2009
Figure 7. (A) Simplified regional scale cross section from the subducting Cocos plate across the Middle American Trench to the arc showing the geometry of the subducting slab beneath across the Herradura block along B to B′ ( Fig. 1C ) drawn without vertical exaggeration. Here, forearc thickening
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—Photomicrographs of Cretaceous rocks of coastal Peru.  a. Subarkose, La He...
Published: 01 January 1963
PL. 1. —Photomicrographs of Cretaceous rocks of coastal Peru. a. Subarkose, La Herradura Formation, Lima. Ordinary light, ×30. Consists of quartz (clear), feldspar (clouded), volcanic rock fragments (dark colored), and matrix. b. Subgraywacke, La Herradura Formation, Lima. Crossed nicols, ×30
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Location map of the study area depicting the basin paleogeography. Gray are...
Published: 18 March 2016
Figure 1 Location map of the study area depicting the basin paleogeography. Gray areas indicate positive topography. Sampling localities: RP, Río Blanco Anticlinal; QL, Quebrada Larga; H, Huaco area (Quebrada La Herradura and Quebrada La Delfina); DS
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Geologic map spanning the central seamount segment of the Costa Rican forea...
Published: 01 July 2009
Figure 5. Geologic map spanning the central seamount segment of the Costa Rican forearc showing the geology of the Herradura, Esterillos, Parrita, and Quepos blocks. Mesoscale fault population data (lower-hemisphere, equal-area projections) are keyed to the map by letter ( Table 2
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Figure 3. Geological map showing the different formations of the submarine ...
Published: 01 July 2006
Figure 3. Geological map showing the different formations of the submarine volcanic group and the transitional volcanic group: Unit A—Barranco del Tarajalito Formation, unit B—La Herradura Formation, unit C—Los Negros Formation, unit D—La Gatera Formation, unit E—Toscano Formation, unit F—El Valle
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Figure 11. Depositional models of the different geological formations of th...
Published: 01 July 2006
Figure 11. Depositional models of the different geological formations of the submarine volcanic group. (A) Barranco del Tarajalito Formation; (B) La Herradura Formation; (C) Los Negros Formation; (D) La Gatera Formation; (E) Toscano Formation; (F) El Valle Formation. Depositional models
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Simplified geological map of the central Pacific coast region modified from...
Published: 01 October 2006
by significant fault margins. Uplift is continuous throughout the blocks but D/U symbols are indicative of differential uplift rates and relative block motions. PB = Parrita Block; EB = Esterillos Block; HB = Herradura Block; OB = Orotina Block. Symbols: white star: location of Finca Los Angeles weather station
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Figure 5. Field photographs showing representative structures of the studie...
Published: 01 July 2006
-fragment breccias. Note the presence of abundant, concentric vesicles (unit B, La Herradura Formation). (C) Alternating volcanic sandstones and siltstones. The inset shows horizontal bioturbation in a siltstone layer (unit E, Toscano Formation). (D) Scleractinia corals, preserved in life position
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Dietotenhosen remondi  (Philippi,  1887 ) n. comb.: ( 1, 11 ) right valve, ...
Published: 01 November 2019
. coquimbensis Möricke, 1896 UNISTRA 52731 provided by K. Janneau, from “Coquimbo,” Coquimbo Formation; ( 3, 5 ) right valve, GNS WM 9616 provided by M. Terezow, from Quebrada Herradura, Coquimbo Formation, ( 3 ) external view, ( 5 ) hinge; ( 4 ) external view of left valve, syntype of P. coquimbensis
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Summarized Deseado Massif geological map with location and discrimination o...
Published: 18 July 2019
and silicified rocks (green). Inset with location of the Deseado Massif geological province in Argentina (modified from Guido & Campbell, 2011 ). LU: La Unión, CN: Cerro Negro, CC: Cerro Contreras, LL: La Leona, NA: Cañadón Nahuel, EM: El Macanudo, LH: La Herradura, EA: El Águila, SA: San Agustín, LF: La
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Field photographs. ( a ) Southern side of the Sierra de Tejeda. Large-scale...
Published: 08 February 2018
. ( c ) Migmatitic schists above Torrox Gneiss. Fold interference pattern, with isoclinal D 2 fold refolded by open D 3 folds. ( d ) West of Almuñécar, near La Herradura. L 2 stretching lineation on an S 2 surface, defined by preferred orientation of amphibole rods and aggregates. D 3 folds deform
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Figure 10. Structural map of the submarine, transitional, and subaerial vol...
Published: 01 July 2006
) unit A ( f 1 : statistically determined fold axis); (C) unit B; (D) units C to G5 ( f 2 : statistically determined fold axis). (E) Rose diagram of lava flow directions measured in the Barranco del Tarajalito, La Herradura, and La Gatera Formations (units A, B, D), restored after eliminating