Tectonostratigraphic Terranes and Tectonic Evolution of Mexico
... Part 1 of this work (Sedlock, Ortega-Gutierrez, and Speed) is a synthesis of geo scientific data pertaining to Mexico and northern Central America using the framework of a new division of these regions into tectonostratigraphic terranes. First, we review the morphotectonic provinces and the modern pl ...
... Part 1 of this work (Sedlock, Ortega-Gutierrez, and Speed) is a synthesis of geo scientific data pertaining to Mexico and northern Central America using the framework of a new division of these regions into tectonostratigraphic terranes. First, we review the morphotectonic provinces and the modern pl ...
Extensional Tectonics in the Basin and Range Province and the
... in the Death Valley region of the Basin and Range province in the western United States. Detailed mapping of the Grapevine Mountains, in northeastern Death Valley, yields new information on the structural evolution of the Titus Canyon anticline, a west-vergent fold of the Cordilleran thrust belt. Th ...
... in the Death Valley region of the Basin and Range province in the western United States. Detailed mapping of the Grapevine Mountains, in northeastern Death Valley, yields new information on the structural evolution of the Titus Canyon anticline, a west-vergent fold of the Cordilleran thrust belt. Th ...
08_chapter 2
... recent alluvium as well as windblown sand. The Aravallis, one of the most ancient mountains in the world, have the oldest granitic and gneissic rocks at their base. Delhi Super Group, the Vindhyan Super Group and younger rocks are highly metamorphosed at certain places and show rich occurrences of m ...
... recent alluvium as well as windblown sand. The Aravallis, one of the most ancient mountains in the world, have the oldest granitic and gneissic rocks at their base. Delhi Super Group, the Vindhyan Super Group and younger rocks are highly metamorphosed at certain places and show rich occurrences of m ...
Environment of the Yukon (G.G.E. Scudder)
... area thickly spotted with lakes and ponds. The southern part of the Porcupine Plain, termed the Eagle Plain, is an extensive flat, unglaciated area, some 190 km long and 95 km wide, now traversed by the Dempster Highway. The Tintina Trench runs through the centre of the Yukon Plateau, arising in the ...
... area thickly spotted with lakes and ponds. The southern part of the Porcupine Plain, termed the Eagle Plain, is an extensive flat, unglaciated area, some 190 km long and 95 km wide, now traversed by the Dempster Highway. The Tintina Trench runs through the centre of the Yukon Plateau, arising in the ...
Geographical characteristics of Silesia
... The rough outline of the relief of Silesia was formed in the Paleozoic Era, finally reaching its ultimate form in the Cenozoic Era. The same holds true for both the Sudetes as well as the entire tectonic foreland, which was shaped by a glacier. Silesian land has always been rich in mineral resources ...
... The rough outline of the relief of Silesia was formed in the Paleozoic Era, finally reaching its ultimate form in the Cenozoic Era. The same holds true for both the Sudetes as well as the entire tectonic foreland, which was shaped by a glacier. Silesian land has always been rich in mineral resources ...
BERYLLIUM RESOURCES IN NEW MEXICO AND ADJACENT
... mining districts (blue) in the area (defined by McLemore, 2010a). Red line is boundary of Alamosa basin. Major granitic-rhyolite intrusions are shown in colored polygons and discussed in text. Not all rhyolite intrusions in the San Mateo Mountains are shown. Black lines are faults from Osburn (1984) ...
... mining districts (blue) in the area (defined by McLemore, 2010a). Red line is boundary of Alamosa basin. Major granitic-rhyolite intrusions are shown in colored polygons and discussed in text. Not all rhyolite intrusions in the San Mateo Mountains are shown. Black lines are faults from Osburn (1984) ...
The Physical Environment of West Africa
... Zone D, which occurs south of Zone C for a further 300 km. The humidity is high and rain is an almost daily phenomenon. Showers commonly last for five to six hours, but sometimes they persist all day. Skies are generally cloudy and overcast, but on most days a few hours of sunshine may still be reco ...
... Zone D, which occurs south of Zone C for a further 300 km. The humidity is high and rain is an almost daily phenomenon. Showers commonly last for five to six hours, but sometimes they persist all day. Skies are generally cloudy and overcast, but on most days a few hours of sunshine may still be reco ...
early evolution of the North American Cordillera Baltican and
... to Lower Cambrian quartzite and marble of the distal Laurentian miogeocline (Logan & Colpron 2006). Limited detrital zircon data from the Lardeau Group and underlying continental margin strata are dominated by c. 1.8 Ga grains that suggest a common source (recycling?) in Precambrian domains of Alber ...
... to Lower Cambrian quartzite and marble of the distal Laurentian miogeocline (Logan & Colpron 2006). Limited detrital zircon data from the Lardeau Group and underlying continental margin strata are dominated by c. 1.8 Ga grains that suggest a common source (recycling?) in Precambrian domains of Alber ...
Memoir 36: Geology of Organ Mountains and southern San Andres
... description of the ore deposits and his petrographic work with the igneous and metamorphic rocks are not likely to be improved upon for many years. Besides being of interest for the local geology, the book is also of general value because Dunham carefully martials evidence from the Organs on such to ...
... description of the ore deposits and his petrographic work with the igneous and metamorphic rocks are not likely to be improved upon for many years. Besides being of interest for the local geology, the book is also of general value because Dunham carefully martials evidence from the Organs on such to ...
Snoke and Barnes, 2006
... younger to the west. The lithic belts were subsequently subdivided into many tectonostratigraphic terranes, and these lithotectonic units are always fault-bounded. Few of the regional faults are fossil subduction zones, but multiple episodes of high pressure–low temperature (blueschist-facies) metam ...
... younger to the west. The lithic belts were subsequently subdivided into many tectonostratigraphic terranes, and these lithotectonic units are always fault-bounded. Few of the regional faults are fossil subduction zones, but multiple episodes of high pressure–low temperature (blueschist-facies) metam ...
Volcanogenic karstification of Sistema Zacatón, Mexico
... Major karst features in northeastern Mexico occur in Cretaceous (130–80 Ma) carbonate rocks. There is a wide distribution of carbonate facies in these units, because paleogeographic conditions varied both spatially and temporally. Lower Cretaceous rocks in the region are a thick (over 2000 m) buildu ...
... Major karst features in northeastern Mexico occur in Cretaceous (130–80 Ma) carbonate rocks. There is a wide distribution of carbonate facies in these units, because paleogeographic conditions varied both spatially and temporally. Lower Cretaceous rocks in the region are a thick (over 2000 m) buildu ...
geology and mineral resources in the ojo caliente no. 2 mining
... Survey (Mason and Arndt, 1996), the Minerals Industry Location System (MILS) of the U.S. Bureau of Mines (U.S. Bureau of Mines, 1995), U.S. Forest Service Abandoned and Inactive Mines database, AMLIS (U.S. Bureau of Land Management), the New Mexico Mines Database (McLemore et al., 2005a, b), and unp ...
... Survey (Mason and Arndt, 1996), the Minerals Industry Location System (MILS) of the U.S. Bureau of Mines (U.S. Bureau of Mines, 1995), U.S. Forest Service Abandoned and Inactive Mines database, AMLIS (U.S. Bureau of Land Management), the New Mexico Mines Database (McLemore et al., 2005a, b), and unp ...
Geomorphic analysis of transient landscapes in the Sierra
... is due to the fact that this boundary is highly diffuse and most of the active deformation is distributed over the Sierra Madre de Chiapas orogenic belt. On top of that, none of the revisited tectonic models of the North American–Caribbean–Cocos plate boundary have attempted to include the Maya Moun ...
... is due to the fact that this boundary is highly diffuse and most of the active deformation is distributed over the Sierra Madre de Chiapas orogenic belt. On top of that, none of the revisited tectonic models of the North American–Caribbean–Cocos plate boundary have attempted to include the Maya Moun ...
Comparison of the Central Metamorphic Belt and Trinity terrane of
... the Feather River terrane of the northern Sierra Nevada share strong similarities in their protolith types, metamorphic parageneses, structures, ages of formation and metamorphism, and relations with surrounding units. These terranes consist of ductilely deformed ultramafic to mafic plutonic and vol ...
... the Feather River terrane of the northern Sierra Nevada share strong similarities in their protolith types, metamorphic parageneses, structures, ages of formation and metamorphism, and relations with surrounding units. These terranes consist of ductilely deformed ultramafic to mafic plutonic and vol ...
The ancestral Cascades arc: Cenozoic evolution of the central
... The ancestral Cascades arc models (Wolfe et al., 1997; House et al., 1998, 2001; Poage and Chamberlain, 2002; Horton et al., 2004; Stock et al., 2004; Clark et al., 2005; Cecil et al., 2006). Similarly, controversy abounds regarding the forces driving Cenozoic uplift, but possibilities include remov ...
... The ancestral Cascades arc models (Wolfe et al., 1997; House et al., 1998, 2001; Poage and Chamberlain, 2002; Horton et al., 2004; Stock et al., 2004; Clark et al., 2005; Cecil et al., 2006). Similarly, controversy abounds regarding the forces driving Cenozoic uplift, but possibilities include remov ...
Mesa Central of México: Stratigraphy, structure, and Cenozoic
... southern part of Mesa Central. Until that time, the rocks had not been divided into lithostratigraphic units. However, the 1968 map includes Cretaceous rocks and local outcrops of older rocks in the northern region of Mesa Central, in Zacatecas, Catorce, Ojo Caliente, and Charcas. The rest of the su ...
... southern part of Mesa Central. Until that time, the rocks had not been divided into lithostratigraphic units. However, the 1968 map includes Cretaceous rocks and local outcrops of older rocks in the northern region of Mesa Central, in Zacatecas, Catorce, Ojo Caliente, and Charcas. The rest of the su ...
(VMS) Deposits - Department of Natural Resources
... all the time. They’re attractive to companies because the deposit type is well known and has an attractive economic profile. The combination of base and precious metals keeps these deposits in vogue through the wild market swings that tend to knock the wind out of other deposits (gold being a good r ...
... all the time. They’re attractive to companies because the deposit type is well known and has an attractive economic profile. The combination of base and precious metals keeps these deposits in vogue through the wild market swings that tend to knock the wind out of other deposits (gold being a good r ...
BIOPHYSICAL REGIONS
... Lowlands. The region is characterized by gently rolling terrain with elevations averaging between 800’ and 1000’. Scattered mountains occur in the Winterville area and on a small pluton north of Shin Pond. Topographic highs include Pennington Mountain (1578’), Green Mountain (1687’), and Mount Chase ...
... Lowlands. The region is characterized by gently rolling terrain with elevations averaging between 800’ and 1000’. Scattered mountains occur in the Winterville area and on a small pluton north of Shin Pond. Topographic highs include Pennington Mountain (1578’), Green Mountain (1687’), and Mount Chase ...
Istanbulluoglu et al.
... while the south-facing slope exhibits a leaky behavior [Gutiérrez-Jurado et al., 2007]. Although these ecohydrological differences have only been recorded for the SLF, we believe the same holds true for the PF, as they have similar soil, vegetation, and climate characteristics. [13] To examine the ...
... while the south-facing slope exhibits a leaky behavior [Gutiérrez-Jurado et al., 2007]. Although these ecohydrological differences have only been recorded for the SLF, we believe the same holds true for the PF, as they have similar soil, vegetation, and climate characteristics. [13] To examine the ...
Patagonia: where does it come from?
... is proposed that the Somuncurá Massif of northern Patagonia is the conjugate margin of the Pensacola Mountains in East Antarctica. The main episodes of deformation within the Cambrian-Ordovician Ross Orogeny are correlated, as well as the passive margin setting during the Silurian-Devonian, which in ...
... is proposed that the Somuncurá Massif of northern Patagonia is the conjugate margin of the Pensacola Mountains in East Antarctica. The main episodes of deformation within the Cambrian-Ordovician Ross Orogeny are correlated, as well as the passive margin setting during the Silurian-Devonian, which in ...
Review of Upper Paleozoic and Lower Mesozoic stratigraphy and
... are made up of a mosaic of pre-Jurassic terranes, and that previously defined terranes are mostly composites of basements of different origins. Most of those terranes are allochthonous with respect to North America, but some developed not far from their present position. It has been suggested that t ...
... are made up of a mosaic of pre-Jurassic terranes, and that previously defined terranes are mostly composites of basements of different origins. Most of those terranes are allochthonous with respect to North America, but some developed not far from their present position. It has been suggested that t ...
Answer key
... 2. The Himalayan Mountains form an unstable zone and is earthquake prone while the Peninsular Plateau is the most stable zone. 3. The Himalayas has young topography with high peaks, deep valleys and fast flowing rivers while the Plateau has rounded hills and broad valleys. 4. The Himalayas has sedim ...
... 2. The Himalayan Mountains form an unstable zone and is earthquake prone while the Peninsular Plateau is the most stable zone. 3. The Himalayas has young topography with high peaks, deep valleys and fast flowing rivers while the Plateau has rounded hills and broad valleys. 4. The Himalayas has sedim ...
Ignimbrite flare-up and deformation in the southern Sierra Madre
... samples TS-10, TS-21, and TS-46, for which we took the plateau age as our best estimate of the age. For sample TS28 we analyzed concentrates of plagioclase and biotite, and because of the scarcity of these minerals, only a few milligrams could be obtained. Two experiments were conducted on the bioti ...
... samples TS-10, TS-21, and TS-46, for which we took the plateau age as our best estimate of the age. For sample TS28 we analyzed concentrates of plagioclase and biotite, and because of the scarcity of these minerals, only a few milligrams could be obtained. Two experiments were conducted on the bioti ...
Sierra Madre Occidental
The Sierra Madre Occidental is a mountain range in western Mexico. The name Sierra Madre means ""Mother Mountains"". The range extends from near the Arizona border down to the Sierra Madre del Sur. The high plateau that is formed by the range is cut by deep river valleys. This plateau is formed from volcanic rock overlying a basement of metamorphic rock.This uplift has caused changes in weather patterns; increased rainfall occurring in the mountains has provided areas where ecosystems can form in wetter areas than surrounding land. This water-source forms watersheds that provide the arid surroundings with water that makes it possible to irrigate and farm crops. The wet ecosystems are islands of biodiversity, differing significantly from what would otherwise be a desert landscape. Oak forests are the predominant plant life and extend into the low land deserts.This forest and canyon land provided a place for a variety of indigenous people to live, until Spanish settlers with associated Mestizos came into the area to found towns for the silver mines in the area. The major industries in the area now are agriculture and forestry, which have become contentious because of land degradation and the native population's opposition to these practices.