Canadian Shield - Prairie Research Institute
... are often spectacular, having the aspect of a small crater (DiLabio, 1978). These latter features form in much the same way as palsen, with ice lensing causing heave along subhorizontal fractures within the outcrop. Pingos, common in the shallow lakes and fine-grained drift northwest of the Shield, ...
... are often spectacular, having the aspect of a small crater (DiLabio, 1978). These latter features form in much the same way as palsen, with ice lensing causing heave along subhorizontal fractures within the outcrop. Pingos, common in the shallow lakes and fine-grained drift northwest of the Shield, ...
Study Guide
... 4. formed when heat, pressure, or fluids act on other types of rock and affect their composition ...
... 4. formed when heat, pressure, or fluids act on other types of rock and affect their composition ...
Plate Tectonics
... Plate Tectonics • Theory that the lithosphere is made up of plates that float on the asthenosphere ...
... Plate Tectonics • Theory that the lithosphere is made up of plates that float on the asthenosphere ...
Terrestrial aftermath of the Moon
... The connection between tidal heating and the upper bound on radiative cooling created a stable climate buffer [4,5]. Dissipation by oscillating tidal stresses for hot silicate interiors can be characterized by the Maxwell time η/Γ (where η is viscosity and Γ is shear modulus). This dissipation is st ...
... The connection between tidal heating and the upper bound on radiative cooling created a stable climate buffer [4,5]. Dissipation by oscillating tidal stresses for hot silicate interiors can be characterized by the Maxwell time η/Γ (where η is viscosity and Γ is shear modulus). This dissipation is st ...
The physics of the near-field
... Over the last decade, extensive exploitation of the different kinds of near-fields existing spontaneously or artificially in immediate proximity to the surface of materials has generated a considerable amount of new exciting developments. In this review the main physical properties of these peculiar ...
... Over the last decade, extensive exploitation of the different kinds of near-fields existing spontaneously or artificially in immediate proximity to the surface of materials has generated a considerable amount of new exciting developments. In this review the main physical properties of these peculiar ...
Multiagent simulation of evolutive plate tectonics applied to the
... investigations of the mechanical and thermal coupling between insulating lids and mantle flow. Various studies show that continents may create long wavelength patterns in the convective layer [Phillips and Bunge, 2005; Grigné et al., 2007a, 2007b] while ...
... investigations of the mechanical and thermal coupling between insulating lids and mantle flow. Various studies show that continents may create long wavelength patterns in the convective layer [Phillips and Bunge, 2005; Grigné et al., 2007a, 2007b] while ...
Tectonic Evolution and Dynamics of Deepwater Area of Pearl River
... Tectonic subsidence curves show that Cenozoic tectonic subsidence varies dramatically in the different structural units in the deepwater area of the PRMB (Fig. 5). The subsidence is small in structural highs, while great in the centre of sags. For example, there is only 2 km tectonic subsidence in t ...
... Tectonic subsidence curves show that Cenozoic tectonic subsidence varies dramatically in the different structural units in the deepwater area of the PRMB (Fig. 5). The subsidence is small in structural highs, while great in the centre of sags. For example, there is only 2 km tectonic subsidence in t ...
PC_Earth_Science_Macomb_April08
... Students will understand the nature of science and demonstrate an ability to practice scientific reasoning by applying it to the design, execution, and evaluation of scientific investigations. Students will demonstrate their understanding that scientific knowledge is gathered through various forms o ...
... Students will understand the nature of science and demonstrate an ability to practice scientific reasoning by applying it to the design, execution, and evaluation of scientific investigations. Students will demonstrate their understanding that scientific knowledge is gathered through various forms o ...
cyclicity in cordilleran orogenic systems
... the strongly deformed hinterland and retroarc thrust belt; ancient counterparts are abound in the geological record1,2. These systems are distinguished from other plate boundaries associated with subduction zones by their large amounts of crustal shortening and thickening, high regional elevations a ...
... the strongly deformed hinterland and retroarc thrust belt; ancient counterparts are abound in the geological record1,2. These systems are distinguished from other plate boundaries associated with subduction zones by their large amounts of crustal shortening and thickening, high regional elevations a ...
What is Basin Modeling
... The sediments accumulating in a basin represent a load on the lithosphere. Isostasy is the principle of Archimedes applied on the earth’s upper layers. It is one of the main processes operating in basin formation. The theoretical isostatic deflections are calculated due to the loading/unloading of s ...
... The sediments accumulating in a basin represent a load on the lithosphere. Isostasy is the principle of Archimedes applied on the earth’s upper layers. It is one of the main processes operating in basin formation. The theoretical isostatic deflections are calculated due to the loading/unloading of s ...
Review of the Lithium Isotope System as a Geochemical Tracer
... The Li isotopic composition of river water is not highly sensitive to that of the bedrock, in contrast to radiogenic isotopic ratios used to monitor chemical weathering (Huh et al., 1998). There is thus promise in using the evolution of the Li isotope ratio of seawater to assess past changes in the ...
... The Li isotopic composition of river water is not highly sensitive to that of the bedrock, in contrast to radiogenic isotopic ratios used to monitor chemical weathering (Huh et al., 1998). There is thus promise in using the evolution of the Li isotope ratio of seawater to assess past changes in the ...
Dynamic Earth: crustal and mantle heterogeneity
... about the general stratification with depth. A snapshot of current structure is provided by geophysical evidence, whereas geochemical information provides a perspective over the age of the Earth. The combination of information on the distribution of heterogeneity from geophysical and geochemical sour ...
... about the general stratification with depth. A snapshot of current structure is provided by geophysical evidence, whereas geochemical information provides a perspective over the age of the Earth. The combination of information on the distribution of heterogeneity from geophysical and geochemical sour ...
Chapter 3 Electric Flux Density, Gauss` Law, and Divergence
... may apply to other problems, including several to which Coulomb's law is almost incapable of supplying an answer. Are there any other surfaces which would have satisfied our two conditions? The student should determine that such simple surfaces as a cube or a cylinder do not meet the requirements. A ...
... may apply to other problems, including several to which Coulomb's law is almost incapable of supplying an answer. Are there any other surfaces which would have satisfied our two conditions? The student should determine that such simple surfaces as a cube or a cylinder do not meet the requirements. A ...
The Bent Hawaiian-Emperor Hotspot Track
... search for alternatives to emerging contradictory findings. It had been recognized in reconstructing plate motions that a fixed Hawaiian hotspot was inconsistent with fixed hotspots in the IndoAtlantic realm (3). However, early reconstructions relied on a critical plate circuit link through the then ...
... search for alternatives to emerging contradictory findings. It had been recognized in reconstructing plate motions that a fixed Hawaiian hotspot was inconsistent with fixed hotspots in the IndoAtlantic realm (3). However, early reconstructions relied on a critical plate circuit link through the then ...
Full Text
... (e.g., Hirth et al., 2000). Each of these descriptions frames a unique lithosphere thickness. In other words, if using the TBL construct to describe the lithosphere, the corresponding thickness may not be the same as for the thickness of the lithosphere as described by a MBL. So, which definition sh ...
... (e.g., Hirth et al., 2000). Each of these descriptions frames a unique lithosphere thickness. In other words, if using the TBL construct to describe the lithosphere, the corresponding thickness may not be the same as for the thickness of the lithosphere as described by a MBL. So, which definition sh ...
How Plate-forming Processes Explain Structure and Shortening in
... section was constructed and restored using balancing techniques constrained by stratigraphic data from wells, seismic reflection profiles and field geological mapping. Crustal shortening, R, is calculated as a ratio, in percent, of the amount of horizontal shortening accumulated since the initiation ...
... section was constructed and restored using balancing techniques constrained by stratigraphic data from wells, seismic reflection profiles and field geological mapping. Crustal shortening, R, is calculated as a ratio, in percent, of the amount of horizontal shortening accumulated since the initiation ...
An introduction to magma dynamics Geological Society, London
... Therefore, the reader may obtain additional insights to a particular theme by referring to the other sections of the book. With the exception of two contributions (Leeman et al.; Wright & Klein), all case studies presented in this volume deal with subduction zone magmatism. The inferences made here ...
... Therefore, the reader may obtain additional insights to a particular theme by referring to the other sections of the book. With the exception of two contributions (Leeman et al.; Wright & Klein), all case studies presented in this volume deal with subduction zone magmatism. The inferences made here ...
geologic time, concepts, and principles
... Gould argued that Hutton's interpretation of uniformitarianism actually included a cyclical series of events in which all of Earth history was repeated with "repair" of the earlier age, much as many primal societies view time as a cyclical, rather than linear, phenomenon. Furthermore, the rates of g ...
... Gould argued that Hutton's interpretation of uniformitarianism actually included a cyclical series of events in which all of Earth history was repeated with "repair" of the earlier age, much as many primal societies view time as a cyclical, rather than linear, phenomenon. Furthermore, the rates of g ...
geology guidance for teaching
... carbonate rocks (hydrolysis, carbonation, solution and oxidation) produces a range of new minerals and solutions together with residual, resistant minerals • biological weathering involves physical and chemical changes. ...
... carbonate rocks (hydrolysis, carbonation, solution and oxidation) produces a range of new minerals and solutions together with residual, resistant minerals • biological weathering involves physical and chemical changes. ...
Plate Tectonics Conceptest
... Evidence from the Seafloor In the decades following Wegener’s research, key observations about the seafloor contributed to a new understanding of Earth processes − Seafloor topography − Age of the seafloor − Heat flow − Volcanoes − Earthquakes ...
... Evidence from the Seafloor In the decades following Wegener’s research, key observations about the seafloor contributed to a new understanding of Earth processes − Seafloor topography − Age of the seafloor − Heat flow − Volcanoes − Earthquakes ...
Author`s personal copy - School of Arts and Sciences
... deformation and uplift are decoupled, and (2) uncertainties associated with direct observations of the elevation history using paleoaltimetry techniques are often substantial (e.g. ± ≥1000 m, Gregory-Wodzicki, 2000). Furthermore, numerical models of plateau formation are limited by inadequate knowle ...
... deformation and uplift are decoupled, and (2) uncertainties associated with direct observations of the elevation history using paleoaltimetry techniques are often substantial (e.g. ± ≥1000 m, Gregory-Wodzicki, 2000). Furthermore, numerical models of plateau formation are limited by inadequate knowle ...
Numerical modeling of geochemical variations caused by crustal
... We have investigated the composition and the geochemical evolution of liquids derived from such composite diapirs by analyzing the differing proportions of the crustal end-members in the source, i.e., basalt and sediment. Our results show that the proportions of the components (in the diapiric mélan ...
... We have investigated the composition and the geochemical evolution of liquids derived from such composite diapirs by analyzing the differing proportions of the crustal end-members in the source, i.e., basalt and sediment. Our results show that the proportions of the components (in the diapiric mélan ...
Introduction to the special issue on “Subduction Zones”
... 1966). This idea is also confirmed by evidence that no in situ oceanic lithosphere older than ca. 270 Ma exists on Earth (Müller et al., 2008; Fig. 1a). The process of sinking of cold oceanic lithosphere into the mantle, occurring at convergent margins, is called subduction. Subduction is not only ...
... 1966). This idea is also confirmed by evidence that no in situ oceanic lithosphere older than ca. 270 Ma exists on Earth (Müller et al., 2008; Fig. 1a). The process of sinking of cold oceanic lithosphere into the mantle, occurring at convergent margins, is called subduction. Subduction is not only ...
Geomorphology
Geomorphology (from Greek: γῆ, ge, ""earth""; μορφή, morfé, ""form""; and λόγος, logos, ""study"") is the scientific study of the origin and evolution of topographic and bathymetric features created by physical or chemical processes operating at or near the earth's surface. Geomorphologists seek to understand why landscapes look the way they do, to understand landform history and dynamics and to predict changes through a combination of field observations, physical experiments and numerical modeling. Geomorphology is practiced within physical geography, geology, geodesy, engineering geology, archaeology and geotechnical engineering. This broad base of interests contributes to many research styles and interests within the field.