Igneous rocks
TítuloFirst data on testate amoebae in speleothems of caves in igneous rocks
... by igneous rocks are characterized by their low porosity and scarce solubility, so in these cases runoff normally moves on the ...soluble rocks and are also differentiated from the karst sensu sc- ...
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Geochemistry of Carboniferous low metamorphic grade sedimentary and tholeiitic igneous rocks in the western Acatlán complex, southern Mexico: deposition along the active western margin of Pangea
... high-pressure rocks into the Acatlán complex in an active tectonic margin (Ramos-Arias et ...pressure rocks is a process that occurs only in an active margin ...Devonian-Carboniferous igneous ...
16
Timing of the magmatism of the paleo Pacific border of Gondwana: U Pb geochronology of Late Paleozoic to Early Mesozoic igneous rocks of the north Chilean Andes between 20° and 31°S
... Middle Triassic to Early Jurassic volcanic rocks yiel- ded zircon U-Pb ages from 249.7±3.8 to 194.0±9.2 Ma, their outcrops are more discontinuous (patchy) and dispersed compared to the older volcanic rocks, ...
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Early Jurassic arc related magmatism associated with porphyry copper mineralization at Zafranal, Southern Peru unraveled by zircon U-Pb ages
... arc-related igneous rocks host porphyry copper prospects and gold-bearing quartz vein deposits in southern ...wall rocks of gold-bearing quartz veins, Jurassic rocks and copper-mineralized ...
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Provenance of sands from Cazones, Acapulco, and Bahía Kino beaches, México
... 99º56’W). Rocks are dominated by: (1) granites and granitoids of Early Paleocene age; (2) volcanic rocks of intermediate to acid composition, mostly of early Tertiary age (andesite to rhyolite); (3) ...
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Maturing Arc signatures monired by trace element and Hf isotope systematics in the early cretaceous Zacatecas volcanic field, Mexico
... these rocks underwent hydrothermal/deuteric alteration and greenschist facies metamorphism, fluid-mobile elements such as K, Na, Rb, or Sr need to be treated with caution in petrogenetic and tectonic ...primitive ...
17
Tectonothermal history of the Mesoproterozoic Novillo Gneiss of eastern Mexico: support for a coherent Oaxaquia microcontinent
... The Novillo Gneiss is one of several exposures of Mesoproterozoic (ca. 1.0–1.2 Ga) basement in eastern Mexico interpreted to be outcrops of a single crustal block (Oaxaquia) that has figured prominently in continental ...
13
C1ENS509
... Sedimentary rocks are formed by deposition of other rocks or the remain of living creatures, followed by compaction of the particulate matter and ...
22
Late Triassic and Early Cretaceous sedimentary sequences of the northern Isfahan Province (Central Iran): stratigraphy and paleoenvironments
... Upper Triassic and Lower Cretaceous rocks are spread widely in central and northern Iran. The major objective of the present study is the Upper Triassic (Norian to Rhaetian) sediments of the Nayband Formation ...
8
TítuloCaves in granitic rocks: types, terminology and origins
... dence. Both forms are commonly developed in arid and coastal environments in which salt occurs at the land surface in crystal form, sug- gesting that the same process may have a role in the formation of the larger as ...
23
Mapeo Geocientífico de las Sierras Pampeanas, 3166-18, Provincia de Córdoba
... Interlayered boudinaged amphibolite bodies, up to tens of metres thick and a kilometre in length, generally form strike ridges. Although very difficult to distinguish on aerial photographs, they have low gamma-ray ...
53
Implementación de un sistema de clúster con rocks en una red tradicional. Caso Plan Automotor Ecuatoriano S.A
... definiendo Rocks como Sistema Operativo del clúster, Piranha para configurar alta disponibilidad y balanceo de carga de servicios web y Ganglia para el monitoreo de recursos de cada nodo del ...
99
Colaboración entre artesanos y diseñadores mexicanos: en busca de nuevos signos
... that rocks, el cual fue elegido por facilitar experiencias de aprendizaje entre alumnos de diseño y artesanos, el tercero Rituales contemporáneos por trabajar con pequeños talleres de manera local, es decir, ...
37
Active microbial biofilms in deep poor porous continental subsurface rocks
... Deep continental subsurface is defined as oligotrophic environments where microorganisms present a very low metabolic rate. To date, due to the energetic cost of production and maintenance of biofilms, their existence ...
9
TítuloDevonian and Carboniferous pre Stephanian rocks from the Pyrenees
... siliciclastics rocks on Culm Facies, termed the Bellver Formation in the el Comte domain (Brower in Hartevelt, ...Culm rocks include a large diversity of lithologies; Delvolvé et ...siliciclastic ...
32
Mapeo Geocientífico de las Sierras Pampeanas, 3166-21 Desiderio Tello, Provincia de La Rioja
... The neosome comprises two types of leucosome: fine to medium-grained muscovite- biotite monzo- or syenogranite and muscovite-bearing pegmatite, and granodiorite. The plagioclase is an- to subhedral, equidimensional and ...
39
Mapeo Geocientífico de las Sierras Pampeanas, 3166-33 Corral de Isaac, Provincia de La Rioja
... the rocks are relatively little deformed. The rocks may have been emplaced during the waning stages of the late Ordovician phase of east-west compressive deformation; however, no other felsic magmatism has ...
57
K/Ar ages of 54 igneous and metamorphic rocks from western, central and southern Mexico
... Fifty-four samples of igneous and metamorphic rocks from south, central and northern Mexico have been analyzed by the K/Ar method. Samples were provided to Instituto de Geología of Universidad Nacional ...
16
Mapeo Geocientífico de las Sierras Pampeanas, 3163-13 Jesús María, Provincia de Córdoba
... Relationships between the Ascochinga Igneous Complex and other Paleozoic units are poorly known. Granitoid units within the complex intrude minor bodies of para- and ortho- gneiss with contacts mostly concordant ...
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Mapeo Geocientífico de las Sierras Pampeanas, 3166-14 Malazán, Provincia de La Rioja
... During the Cainozoic the peneplained Paleozoic basement was uplifted in north-south oriented, elongate fault blocks forming the present-day characteristic topography of rugged sierras separated by flat intermontane ...
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