USGS Professional Paper 1697 - Alaska Resources Library and
... and geographic names for major regions. The major features, continued from the Neogene are (1) a series of continental-margin arcs and companion subduction-zone assemblages around the CircumNorth Pacific; (2) continuation of opening of major sedimentary basins behind major arcs; (3) in the eastern p ...
... and geographic names for major regions. The major features, continued from the Neogene are (1) a series of continental-margin arcs and companion subduction-zone assemblages around the CircumNorth Pacific; (2) continuation of opening of major sedimentary basins behind major arcs; (3) in the eastern p ...
Chapter 9
... the rate of spreading of the South Atlantic Ridge by matching the observed and model profiles using the independently known GPTS back to 3.35 Ma (the Gauss/Gilbert boundary). Using various marine geophysical evidences, Heirtzler et al. argued that the rate of seafloor spreading of the South Atlantic ...
... the rate of spreading of the South Atlantic Ridge by matching the observed and model profiles using the independently known GPTS back to 3.35 Ma (the Gauss/Gilbert boundary). Using various marine geophysical evidences, Heirtzler et al. argued that the rate of seafloor spreading of the South Atlantic ...
STP 3 & 4
... performance-based earthquake ground motion that satisfy the requirements of 10 CFR 100.23 and lead to the establishment of the safe shutdown earthquake (SSE) ground motion. The purpose of Subsection 2.5S.2 is to develop the site-specific ground motion response spectrum (GMRS) characterized by horizo ...
... performance-based earthquake ground motion that satisfy the requirements of 10 CFR 100.23 and lead to the establishment of the safe shutdown earthquake (SSE) ground motion. The purpose of Subsection 2.5S.2 is to develop the site-specific ground motion response spectrum (GMRS) characterized by horizo ...
STP 3 & 4 2.5S.1 Basic Geologic and Seismic Information
... The history of investigations of the Gulf of Mexico basin contains contradictory views on the origin and crustal type present beneath the marine and non-marine sediments that are known to be present. As late as 1967, some geologists favored the concept that the basin had been formed at the end of th ...
... The history of investigations of the Gulf of Mexico basin contains contradictory views on the origin and crustal type present beneath the marine and non-marine sediments that are known to be present. As late as 1967, some geologists favored the concept that the basin had been formed at the end of th ...
STP 3 & 4 2.5S.1 Basic Geologic and Seismic Information
... The history of investigations of the Gulf of Mexico basin contains contradictory views on the origin and crustal type present beneath the marine and non-marine sediments that are known to be present. As late as 1967, some geologists favored the concept that the basin had been formed at the end of th ...
... The history of investigations of the Gulf of Mexico basin contains contradictory views on the origin and crustal type present beneath the marine and non-marine sediments that are known to be present. As late as 1967, some geologists favored the concept that the basin had been formed at the end of th ...
Three lithospheric transects across the Alps and their forelands
... 1. General Introduction The European Alps, located in south-central Europe, record the closure of several ocean basins located in the Mediterranean domain during the Late Cretaceous and Cenozoic convergence of the African (or Apulian) and European plates (e.g. Trümpy 1960, Frisch 1979, Haas et al. 1 ...
... 1. General Introduction The European Alps, located in south-central Europe, record the closure of several ocean basins located in the Mediterranean domain during the Late Cretaceous and Cenozoic convergence of the African (or Apulian) and European plates (e.g. Trümpy 1960, Frisch 1979, Haas et al. 1 ...
Tectonostratigraphic Terranes and Tectonic Evolution of Mexico
... the morphotectonic provinces and the modern plate tectonic framework of the region. Next, we present data for 17 terranes that, except for North America, are named after indigenous cultures. Terrane descriptions are based on published and unpublished geophysical and geologic data of all types, utili ...
... the morphotectonic provinces and the modern plate tectonic framework of the region. Next, we present data for 17 terranes that, except for North America, are named after indigenous cultures. Terrane descriptions are based on published and unpublished geophysical and geologic data of all types, utili ...
PDF
... northern Oman, accommodating ∼ 20 mm yr−1 of convergence between Arabia and Eurasia (Reilinger et al. 2006). In contrast to most other parts of the Alpine–Himalaya mountain chain, convergence with Arabia has not yet obliterated the structure of the hanging-wall fore-arc. Many studies have been done ...
... northern Oman, accommodating ∼ 20 mm yr−1 of convergence between Arabia and Eurasia (Reilinger et al. 2006). In contrast to most other parts of the Alpine–Himalaya mountain chain, convergence with Arabia has not yet obliterated the structure of the hanging-wall fore-arc. Many studies have been done ...
provenance analysis and detrital zircons: keys to - ETH E
... Hf isotopic compositions similar to continental crust, suggesting a rifting related magmatic provenance. Upper Cretaceous-Eocene detrital zircons with Hf isotopic compositions similar to continental crust and non-depleted mantle, suggesting a continental magmatic arc provenance. Moreover, the heavy ...
... Hf isotopic compositions similar to continental crust, suggesting a rifting related magmatic provenance. Upper Cretaceous-Eocene detrital zircons with Hf isotopic compositions similar to continental crust and non-depleted mantle, suggesting a continental magmatic arc provenance. Moreover, the heavy ...
Table of Contents - Society of Economic Geologists
... breccias, and disseminations; the second deposit type includes epigenetic stockworks of Cu-Co ::!:: Zn. Schmidt synthesizes and presents the available information on both the shale- and carbonate-hosted deposit types, concluding each chapter with a discussion of the potential for favorable host rock ...
... breccias, and disseminations; the second deposit type includes epigenetic stockworks of Cu-Co ::!:: Zn. Schmidt synthesizes and presents the available information on both the shale- and carbonate-hosted deposit types, concluding each chapter with a discussion of the potential for favorable host rock ...
bureau of geology - Department of Geosciences
... Brief quotations from this thesis are allowable without special permission, provided that accurate acknowledgment of source is made. Requests for permission for extended quotation from or reproduction of this manuscript in whole or in part may be granted by the head of the major department or the De ...
... Brief quotations from this thesis are allowable without special permission, provided that accurate acknowledgment of source is made. Requests for permission for extended quotation from or reproduction of this manuscript in whole or in part may be granted by the head of the major department or the De ...
Snoke and Barnes, 2006
... The Klamath Mountains province of northwestern California and southwestern Oregon is a classic example of a mountain belt that developed by the tectonic accretion of rock assemblages of oceanic affinity during progressive crustal growth along an active continental margin. Consequently, the Klamath M ...
... The Klamath Mountains province of northwestern California and southwestern Oregon is a classic example of a mountain belt that developed by the tectonic accretion of rock assemblages of oceanic affinity during progressive crustal growth along an active continental margin. Consequently, the Klamath M ...
Laramide crustal thickening event in the Rocky Mountain Foreland
... cause the Wind River range overthrust may also have dragged and transported ductile lower crust from within the Sevier orogen in the Southwest, and emplaced it under ...
... cause the Wind River range overthrust may also have dragged and transported ductile lower crust from within the Sevier orogen in the Southwest, and emplaced it under ...
Mesozoic tectonics of the Maria fold and thrust belt and McCoy basin
... indeed done by one person, but is actually the result of the efforts and support of many people who should be acknowledged. First of all, I would like to thank Karl Karlstrom, my dissertation advisor. Through his interactive and engaging style of advisement, his broad manner of thinking about geolog ...
... indeed done by one person, but is actually the result of the efforts and support of many people who should be acknowledged. First of all, I would like to thank Karl Karlstrom, my dissertation advisor. Through his interactive and engaging style of advisement, his broad manner of thinking about geolog ...
Mineral Resources in the Eastern Alps and Adjoining Areas
... mineral concentrations during all major (pre-Variscan, Variscan and Alpine) evolutionary stages (WEBER, 1997b; EBNER, 1998a, b). This polystage geodynamic evolution reflects a continuous progression in the cratonization of the crust, in which a pre-Alpine minerogenetic epoch can be clearly subdivide ...
... mineral concentrations during all major (pre-Variscan, Variscan and Alpine) evolutionary stages (WEBER, 1997b; EBNER, 1998a, b). This polystage geodynamic evolution reflects a continuous progression in the cratonization of the crust, in which a pre-Alpine minerogenetic epoch can be clearly subdivide ...
Email addresses
... the petrologic and geochemical composition, rheological state, thermal evolution of the lithosphere. These xenoliths, fragments of wall rocks entrained by magmas at upper mantle and lower crustal levels, have been carried to the surface by alkaline basalts extreme rapidly, probably in less then 60 h ...
... the petrologic and geochemical composition, rheological state, thermal evolution of the lithosphere. These xenoliths, fragments of wall rocks entrained by magmas at upper mantle and lower crustal levels, have been carried to the surface by alkaline basalts extreme rapidly, probably in less then 60 h ...
Philippine Sea Plate inception, evolution, and consumption with
... across the paleo-transform boundary between the proto-PSP and the Pacific Plate, Izu-Bonin-Mariana subduction initiation and ultimately PSP inception. (2) The initial splitting phase of the composite proto-PSP under the plume influence at ∼54–48 Ma led to the formation of the long-lived West Philipp ...
... across the paleo-transform boundary between the proto-PSP and the Pacific Plate, Izu-Bonin-Mariana subduction initiation and ultimately PSP inception. (2) The initial splitting phase of the composite proto-PSP under the plume influence at ∼54–48 Ma led to the formation of the long-lived West Philipp ...
Geology of the Murihiku Area
... the Ohai, Nightcaps, Waiau and East Southland groups. The contact is the widespread Late Cretaceous to Cenozoic Waipounamu Erosion Surface in northern Southland. The fault-controlled Cenozoic Waiau Basin contains up to 5 km of marine and non-marine clastic sedimentary rocks; coeval but much thinner ...
... the Ohai, Nightcaps, Waiau and East Southland groups. The contact is the widespread Late Cretaceous to Cenozoic Waipounamu Erosion Surface in northern Southland. The fault-controlled Cenozoic Waiau Basin contains up to 5 km of marine and non-marine clastic sedimentary rocks; coeval but much thinner ...
Sedimentary record of the tectonic growth of a collisional continental
... sandstone. The overall stratigraphy of the Nutzotin Mountains sequence represents a general upward-shallowing and upward-coarsening package that represents a general transition from distal mud-rich submarine-fan strata to more proximal sand-rich submarine-fan strata that are in turn overlain by mari ...
... sandstone. The overall stratigraphy of the Nutzotin Mountains sequence represents a general upward-shallowing and upward-coarsening package that represents a general transition from distal mud-rich submarine-fan strata to more proximal sand-rich submarine-fan strata that are in turn overlain by mari ...
Did westward subduction cause Cretaceous
... Coast plutonic complex was uplifted rapidly as asthenosphere rose through the torn lower-plate lithosphere to invade Rubia with a 1500-km linear belt of break-off– generated magmas. Within the Sonora segment to the south, break-off magmatism was also prevalent. Both the Canadian and Sonoran segments ...
... Coast plutonic complex was uplifted rapidly as asthenosphere rose through the torn lower-plate lithosphere to invade Rubia with a 1500-km linear belt of break-off– generated magmas. Within the Sonora segment to the south, break-off magmatism was also prevalent. Both the Canadian and Sonoran segments ...
Magmatic growth and batholithic root development in the northern
... of the batholith in its northern reaches, making it difficult to evaluate range-wide, spatiotemporal trends in batholithic development and the regional extent of eclogite root production and/or loss. New U-Pb ages from northern Sierra plutons reveal a shift between the age of Cretaceous magmatism re ...
... of the batholith in its northern reaches, making it difficult to evaluate range-wide, spatiotemporal trends in batholithic development and the regional extent of eclogite root production and/or loss. New U-Pb ages from northern Sierra plutons reveal a shift between the age of Cretaceous magmatism re ...
Barrovian metamorphism in the central Kootenay Arc, British
... the processes that gave rise to its formation. ...
... the processes that gave rise to its formation. ...
The potential for gold mineralisation in the British Permian and
... unconformity in Ayrshire to a depth of 425 m while in north-east England similar reddening is present only to a depth of a few metres. Much, if not most, of this oxidation probably took place before deposition of Permian rocks. Following this study, a limited amount of drainage sampling was carried ...
... unconformity in Ayrshire to a depth of 425 m while in north-east England similar reddening is present only to a depth of a few metres. Much, if not most, of this oxidation probably took place before deposition of Permian rocks. Following this study, a limited amount of drainage sampling was carried ...
Guidebook
... The earliest riftings – Early Triassic – occur along the future Tethyan Ocean and in the North DobrogeaSouth Crimea Aulacogene. The first one precedes the opening of the oceanic Tethys, the second one represents a possible pull-apart structure connected to the right-lateral strike-slip movements alo ...
... The earliest riftings – Early Triassic – occur along the future Tethyan Ocean and in the North DobrogeaSouth Crimea Aulacogene. The first one precedes the opening of the oceanic Tethys, the second one represents a possible pull-apart structure connected to the right-lateral strike-slip movements alo ...
Geochronology and thermochronology of Cretaceous
... western Chukotka and Alaska; its inferred continuation beneath both regions is shown by a heavy dotted line. Known regions of very high Late Cretaceous extensional strain in the Bering Strait region are shown by a light grey pattern (after Amato and Miller, 2004). Location of Fig. 2 is shown by squa ...
... western Chukotka and Alaska; its inferred continuation beneath both regions is shown by a heavy dotted line. Known regions of very high Late Cretaceous extensional strain in the Bering Strait region are shown by a light grey pattern (after Amato and Miller, 2004). Location of Fig. 2 is shown by squa ...
Mesozoic
The Mesozoic Era /mɛzɵˈzoʊɪk/ is an interval of geological time from about 252 to 66 million years ago. It is also called the Age of Reptiles, a phrase introduced by the 19th century paleontologist Gideon Mantell who viewed it as dominated by reptiles such as Iguanodon, Megalosaurus, Plesiosaurus and what are now called Pseudosuchia.Mesozoic means ""middle life"", deriving from the Greek prefix meso-/μεσο- for ""between"" and zōon/ζῷον meaning ""animal"" or ""living being"". It is one of three geologic eras of the Phanerozoic Eon, preceded by the Paleozoic (""ancient life"") and succeeded by the Cenozoic (""new life""). The era is subdivided into three major periods: the Triassic, Jurassic, and Cretaceous, which are further subdivided into a number of epochs and stages.The era began in the wake of the Permian–Triassic extinction event, the largest well-documented mass extinction in Earth's history, and ended with the Cretaceous–Paleogene extinction event, another mass extinction which is known for having killed off non-avian dinosaurs, as well as other plant and animal species. The Mesozoic was a time of significant tectonic, climate and evolutionary activity. The era witnessed the gradual rifting of the supercontinent Pangaea into separate landmasses that would eventually move into their current positions. The climate of the Mesozoic was varied, alternating between warming and cooling periods. Overall, however, the Earth was hotter than it is today. Non-avian dinosaurs appeared in the Late Triassic and became the dominant terrestrial vertebrates early in the Jurassic, occupying this position for about 135 million years until their demise at the end of the Cretaceous. Birds first appeared in the Jurassic, having evolved from a branch of theropod dinosaurs. The first mammals also appeared during the Mesozoic, but would remain small—less than 15 kg (33 lb)—until the Cenozoic.