1-20 OF 49 RESULTS FOR

Arroyo Zamora Formation

Results shown limited to content with bounding coordinates.
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Published: 01 January 1993
DOI: 10.1130/SPE279-p77
... conglomerate. The rocks appear to have been variously deposited by sediment gravity flows and intervening quiet-water deposition in a hemipelagic setting. The rocks of El Marmol contains no datable fossil material but are Lower Permian or older. The Arroyo Zamora Formation has an estimated thickness of 500 m...
Published: 01 January 1993
DOI: 10.1130/SPE279-p91
... Disarticulated Permian crinoid columnals and pluricolumnals, up to 9 cm in diameter, from exotic carbonate blocks in the base of the Zamora Formation, found along Arroyo Zamora near El Volcan, Baja California, Norte, are among the largest ever reported. The relatively inflexible columns...
Journal Article
Published: 01 February 2016
Mineralogical Magazine (2016) 80 (1): 103–126.
...-Muscovite Montebrasite 2 Barroso-Alvão (Vila Real, Northern Portugal) Lima (2000) Martins et al . (2012) Several pegmatites, some Li rich (micaschists) Qtz, Fsp, Ms, Spd, Ptl, Cst, Nb-Ta oxides Spodumene Petalite Lepidolite Montebrasite 3 Tres Arroyos (Badajoz, Spain) Garate-Olave et...
FIGURES
First thumbnail for: Geology and mineralogy of Li mineralization in the...
Second thumbnail for: Geology and mineralogy of Li mineralization in the...
Third thumbnail for: Geology and mineralogy of Li mineralization in the...
Journal Article
Published: 28 January 2021
The Canadian Mineralogist (2020) 58 (6): 747–765.
...Idoia Garate-Olave; Encarnación Roda-Robles; Pedro Pablo Gil-Crespo; Alfonso Pesquera ABSTRACT In the Tres Arroyos granite-pegmatite system (Badajoz, Spain) a zoned aplite-pegmatite field occurs, with poorly evolved, intermediate, and Li-rich dikes intruded into metasediments, close to the contact...
FIGURES
First thumbnail for: Phosphate mineral associations from the Tres <span...
Second thumbnail for: Phosphate mineral associations from the Tres <span...
Journal Article
Published: 01 March 2020
Journal of Paleontology (2020) 94 (2): f1–f4.
... [email protected] Cover illustration: Dorsal view of the holotype of Nanobamus macrorhinus from the Arroyo Formation, early Permian, Texas. Gee and Reisz, Fig. 1.1. ISSN 0022-3360 Copyright © 2020 Th e Paleontological Society. All rights reserved. P A L E O N TO LOGical SO C IE T Y P A L E O N TO LOGical SO...
Journal Article
Published: 01 February 2016
Geological Magazine (2016) 153 (4): 743–749.
...VÍCTOR ADRIÁN PÉREZ-CRESPO; PETER SCHAAF; GABRIELA SOLÍS-PICHARDO; JOAQUÍN ARROYO-CABRALES; LUIS M. ALVA-VALDIVIA; JOSÉ RAMÓN TORRES-HERNÁNDEZ Abstract By using strontium isotopic ratios of dental enamel from molars, we were able to reconstruct the migration context for three individuals...
FIGURES
First thumbnail for: Strontium isotopes and mobility of a Columbian mam...
Second thumbnail for: Strontium isotopes and mobility of a Columbian mam...
Third thumbnail for: Strontium isotopes and mobility of a Columbian mam...
Journal Article
Journal: GSA Bulletin
Published: 01 October 2003
GSA Bulletin (2003) 115 (10): 1173–1190.
... Cuadrada (Tmr3 and Tmr4), the tuffs of Dead Battery Canyon (Tmr5), and the 6.1 ± 0.5 Ma tuffs of Arroyo El Canelo. Offset distributions and facies patterns of these ignimbrites support 255 ± 10 km of opening between conjugate rifted margins of the Upper Delfín basin. Addition of deformation from...
FIGURES
First thumbnail for: Pacific–North America plate motion and opening of ...
Second thumbnail for: Pacific–North America plate motion and opening of ...
Third thumbnail for: Pacific–North America plate motion and opening of ...
Journal Article
Journal: GSA Bulletin
Published: 01 March 2002
GSA Bulletin (2002) 114 (3): 349–366.
... We thank Pablo Marquet, Lautaro Nuñez, and the Museo Arqueológico de San Pedro de Atacama for help with field logistics; Mary Kalin Arroyo, Antonio Maldonado, Christa Placzek, Jason Rech, Barbara Saavedra, Horacio Samaniego, and Katherine Zamora for help in the field; Gabriel Cisneros, Bobby Gillis...
FIGURES
First thumbnail for: Vegetation invasions into absolute desert: A 45;th...
Second thumbnail for: Vegetation invasions into absolute desert: A 45;th...
Third thumbnail for: Vegetation invasions into absolute desert: A 45;th...
Journal Article
Journal: PALAIOS
Published: 01 June 2005
PALAIOS (2005) 20 (3): 296–302.
.... Now, surface water reaches the Gulf of California only in unusually wet years ( Zamora-Arroyo et al., 2001 ). The decreased river flow increased the estuary's salinity ( Rodriguez et al., 2001b ), altered its circulation ( Lavín et al., 1998 ), cut off the supply of sediment to the delta...
FIGURES
First thumbnail for: Who Cares About a Vanishing Clam? Trophic Importan...
Second thumbnail for: Who Cares About a Vanishing Clam? Trophic Importan...
Journal Article
Published: 01 April 2007
Russ. Geol. Geophys. (2007) 48 (4): 378–387.
... ; Julivert, 1983 ; Portero and Aznar, 1984 ). The earlier structures have favoured the development and accommodation of the deformations of the latter. In this sense, the Alpine orogeny affected all materials and, in particular, those prior to the Upper Miocene. It is responsible for the formation of the CS...
FIGURES
First thumbnail for: A morphotectonic study of the Central System, Iber...
Second thumbnail for: A morphotectonic study of the Central System, Iber...
Third thumbnail for: A morphotectonic study of the Central System, Iber...
Journal Article
Journal: GSA Bulletin
Published: 01 June 2000
GSA Bulletin (2000) 112 (6): 857–870.
... Province. Northeast- to east-directed extension began 12–6 Ma along major east-dipping normal faults such as the San Pedro Mártir and Sierra San Felipe faults (e.g., Gastil et al., 1975 ; Stock and Hodges, 1990 ; Lewis and Stock, 1998b ). Pre–6 Ma deformation south of Arroyo Matomí (Fig. 1...
FIGURES
First thumbnail for: Extensional deformation and paleomagnetism at the ...
Second thumbnail for: Extensional deformation and paleomagnetism at the ...
Third thumbnail for: Extensional deformation and paleomagnetism at the ...
Journal Article
Journal: Lithosphere
Publisher: GSW
Published: 01 June 2017
Lithosphere (2017) 9 (3): 453–462.
... , 1990b ). The Tristeza Formation is composed of coarse sandstones and conglomerates derived from the uplifted Mesozoic units to the west that were deposited during active shortening in the late Miocene (Yrioygen, 1993; Silvestro and Atencio, 2009 ; Sagripanti et al., 2011 ). The Arroyo Palao Formation...
FIGURES
First thumbnail for: Triassic to Neogene evolution of the south-central...
Second thumbnail for: Triassic to Neogene evolution of the south-central...
Third thumbnail for: Triassic to Neogene evolution of the south-central...
Journal Article
Published: 01 November 2005
American Mineralogist (2005) 90 (11-12): 1887–1899.
... plutons of various facies and ages. Li ± F ± P ± Sn ± Nb-Ta-bearing pegmatites are common in the western part of Zamora and Salamanca provinces, and form part of the CIZ. Such pegmatites are usually present as individual dike-like bodies, hosted by metasedimentary rocks of the Schist-Graywacke Complex...
FIGURES
First thumbnail for: Origin and internal evolution of the Li-F-Be-B-P-b...
Second thumbnail for: Origin and internal evolution of the Li-F-Be-B-P-b...
Third thumbnail for: Origin and internal evolution of the Li-F-Be-B-P-b...
Journal Article
Published: 10 June 2015
Geological Magazine (2015) 152 (6): 1123–1136.
...ELADIO LIÑÁN; JOSÉ ANTONIO GÁMEZ VINTANED; RODOLFO GOZALO Abstract The type material of Agraulos antiquus Sdzuy, 1961 from the La Herrería Formation, northern Spain, is revised together with additional material and included in the new genus Lunagraulos . The stratigraphical range of Lunagraulos...
FIGURES
First thumbnail for: The middle lower Cambrian (Ovetian) Lunagraulos n....
Second thumbnail for: The middle lower Cambrian (Ovetian) Lunagraulos n....
Third thumbnail for: The middle lower Cambrian (Ovetian) Lunagraulos n....
Journal Article
Published: 01 October 2009
The Canadian Mineralogist (2009) 47 (5): 1213–1223.
... with a chemical composition of a Li-bearing beusite enriched in Mg, derived possibly by contamination by the host rock after the crystallization of the border and wall zones of the pegmatite. The exsolution of this precursor led to the formation of a lamellar intergrowth of beusite and lithiophilite enriched...
FIGURES
First thumbnail for: THE ASSOCIATION QINGHEIITE – BEUSITE – LITHIOPHILI...
Second thumbnail for: THE ASSOCIATION QINGHEIITE – BEUSITE – LITHIOPHILI...
Third thumbnail for: THE ASSOCIATION QINGHEIITE – BEUSITE – LITHIOPHILI...
Journal Article
Published: 15 March 2024
Journal of the Geological Society (2024) 181 (3): jgs2023-065.
... is recurrently thrust over the Upper Cretaceous Neuquén Group ( Fig. 5a and b ). Between the westernmost faults and the La Brea–Doña Juana backthrust, the Molle Formation and the Neuquén Group are separated by an angular unconformity and folded. The Arroyo las Minas–Pincheira backthrust system is mostly...
FIGURES
First thumbnail for: Pleistocene deformation of the Malargüe fold–thrus...
Second thumbnail for: Pleistocene deformation of the Malargüe fold–thrus...
Third thumbnail for: Pleistocene deformation of the Malargüe fold–thrus...
Journal Article
Journal: Geology
Published: 28 April 2021
Geology (2021) 49 (8): 936–940.
... that predate accretion are attributed to both the continental and the coeval oceanic arcs. These zircons are present in rocks of the Cajamarca Complex ( Cochrane et al., 2014 ), Arroyo Seco and Bogota Formations ( Cardona et al., 2012 ; Bustamante et al., 2017 ), and modern river sands (Sinú River; Pepper et...
FIGURES
First thumbnail for: Did accretion of the Caribbean oceanic plateau dri...
Second thumbnail for: Did accretion of the Caribbean oceanic plateau dri...
Third thumbnail for: Did accretion of the Caribbean oceanic plateau dri...
Journal Article
Published: 12 February 2010
Geological Magazine (2010) 147 (5): 690–703.
.... 9). However, as pointed out by Geyer & Landing ( 2004 , p. 183), there appears to be no published information on archaeocyathans or trilobites from this section. A better suited stratotype section is the Arroyo de Pedroche 1 section (Pedroche Formation), which Liñán, Perejón & Sdzuy ( 1993...
Journal Article
Published: 01 December 2024
Mineralogical Magazine (2024) 88 (6): 698–720.
... of mica crystallisation occurred at the same time as elbaite crystallisation and with the formation of magmatic muscovite. Mica continued to crystallise after the conclusion of plagioclase and elbaite crystallisation, as shown by planar and cross-cutting replacement relationships. There were two...
FIGURES
First thumbnail for: Mineralogy and petrology of the petalite-subtype P...
Second thumbnail for: Mineralogy and petrology of the petalite-subtype P...
Third thumbnail for: Mineralogy and petrology of the petalite-subtype P...
Journal Article
Published: 01 July 2009
Journal of the Geological Society (2009) 166 (4): 695–709.
... ; Cobbold & Rossello 2003 ). However, some structures have detached in evaporites of the Auquilco and Huitrín formations ( Zapata et al . 2002 ; Zamora Valcarce et al . 2006 ). Further north, the Chos Malal fold-and-thrust belt lies between two structural highs, the Cordillera del Viento in the W...
FIGURES
First thumbnail for: Widespread bedding-parallel veins of fibrous calci...
Second thumbnail for: Widespread bedding-parallel veins of fibrous calci...
Third thumbnail for: Widespread bedding-parallel veins of fibrous calci...