Epeirogenic uplift above a detached slab in northern Central America
... American plateau contains a network of superimposed rivers with meanders cut into bedrock; such a geomorphic character indicates that the regional uplift occurred in the absence of tilting. We propose that the epeirogenic uplift of northern Central America is the buoyant upper-plate response to the ...
... American plateau contains a network of superimposed rivers with meanders cut into bedrock; such a geomorphic character indicates that the regional uplift occurred in the absence of tilting. We propose that the epeirogenic uplift of northern Central America is the buoyant upper-plate response to the ...
Sine et al.
... migration and ultimately to pervasive lithospheric weakening. The response of juxtaposed Paleozoic and Proterozoic mantle lithosphere to heat and water input could therefore result in the present-day contrast beneath the GB-CP transition. We conclude that our image reveals the western extent of unad ...
... migration and ultimately to pervasive lithospheric weakening. The response of juxtaposed Paleozoic and Proterozoic mantle lithosphere to heat and water input could therefore result in the present-day contrast beneath the GB-CP transition. We conclude that our image reveals the western extent of unad ...
drumlins - The Creation Concept
... V.R. Baker showed that hundreds of streamlined loess hills in eastern Washington were formed subfluvially by catastrophic floods. These resemble drumlins in shape, average 40 meters in height and were formed by currents with a velocity of 12-15 meters per second in a depth of 60 meters of water. [1 ...
... V.R. Baker showed that hundreds of streamlined loess hills in eastern Washington were formed subfluvially by catastrophic floods. These resemble drumlins in shape, average 40 meters in height and were formed by currents with a velocity of 12-15 meters per second in a depth of 60 meters of water. [1 ...
Earthquakes - TeacherWeb
... a strike-slip fault, the rocks on either side of the middle. fault slip past each other sideways, with little up or The stress force called compression squeezes rock down motion. until it folds or breaks. A fold inthat rock that bends upward into is an Stress pushes a mass of rock in an twoarch oppo ...
... a strike-slip fault, the rocks on either side of the middle. fault slip past each other sideways, with little up or The stress force called compression squeezes rock down motion. until it folds or breaks. A fold inthat rock that bends upward into is an Stress pushes a mass of rock in an twoarch oppo ...
Postseismic crustal deformation following the
... best fit viscoelastic model. 2.6 years are 2.4 mm/yr (east), 1.9 mm/yr (north), and 4.1 mm/yr (vertical). Dixon et al. [2000] pointed out that errors given by Mao et al. [1999] may be values too large for modern analyses or different site locations. Since the velocities relative to Wakkanai and Osho ...
... best fit viscoelastic model. 2.6 years are 2.4 mm/yr (east), 1.9 mm/yr (north), and 4.1 mm/yr (vertical). Dixon et al. [2000] pointed out that errors given by Mao et al. [1999] may be values too large for modern analyses or different site locations. Since the velocities relative to Wakkanai and Osho ...
Continents in Motion: The Search for a Unifying Theory
... as the growth of continents, the movement of solid rock beneath Los Angeles, the location of great mountain ranges, differing patterns of temperature in the rocks of the seafloor, and the violent volcanic eruptions on the island of Montserrat in the West Indies? The answer is yes, and the concept is ...
... as the growth of continents, the movement of solid rock beneath Los Angeles, the location of great mountain ranges, differing patterns of temperature in the rocks of the seafloor, and the violent volcanic eruptions on the island of Montserrat in the West Indies? The answer is yes, and the concept is ...
Asymmetric ocean basins - Dipartimento di Scienze della Terra
... interpolation of velocities at fixed depths levels (on a 4 km grid) with subsequent Gaussian smoothing. Here the Vs is taken as an average of Vsv and Vsh along two sections (tectonic equator, TE, and along a sort of perturbed tectonic equator, TE-pert), covering 10° width (Fig. 1). The magnitude of ...
... interpolation of velocities at fixed depths levels (on a 4 km grid) with subsequent Gaussian smoothing. Here the Vs is taken as an average of Vsv and Vsh along two sections (tectonic equator, TE, and along a sort of perturbed tectonic equator, TE-pert), covering 10° width (Fig. 1). The magnitude of ...
A reassessment of the timing of early Archaean crustal
... whole-rock Rb-Sr, Sm-Nd and Pb/Pb regressions have been regarded as too imprecise for adequate age resolution, whilst constraints on crustal evolution imposed by initial Sr, Nd and Pb isotope ratios have been summarily dismissed or totally ignored. We consider that this sole dependence on ion-probe ...
... whole-rock Rb-Sr, Sm-Nd and Pb/Pb regressions have been regarded as too imprecise for adequate age resolution, whilst constraints on crustal evolution imposed by initial Sr, Nd and Pb isotope ratios have been summarily dismissed or totally ignored. We consider that this sole dependence on ion-probe ...
Mountain Building - sabolsciencehonors
... When these mountains are underwater, they are called seamounts. On the geologic time scale, these mountains form very quickly. What do you think happens to the seafloor after these seamounts form? The seamounts are added mass. As a result of isostasy, the oceanic crust around these peaks displaces t ...
... When these mountains are underwater, they are called seamounts. On the geologic time scale, these mountains form very quickly. What do you think happens to the seafloor after these seamounts form? The seamounts are added mass. As a result of isostasy, the oceanic crust around these peaks displaces t ...
Assessing intraplate earthquake hazards from satellite geopotential field observations
... (Received February 22, 2007; Revised November 6, 2007; Accepted November 12, 2007; Online published May 16, 2008) ...
... (Received February 22, 2007; Revised November 6, 2007; Accepted November 12, 2007; Online published May 16, 2008) ...
Plate Tectonics: The Grand Unifying Theory of Geology
... • Two plates of continental material (?) cannot subduct because they are not dense enough. ...
... • Two plates of continental material (?) cannot subduct because they are not dense enough. ...
L
... magma chambers or zones of hot crystal mush, a shallower section of vertically oriented, intrusive dikes,* and a volcanic surface layer of pillow basalts extruded onto the seafloor and capped by sediments. Laboratory analyses show that each of these sequences transmits sound waves with characteristi ...
... magma chambers or zones of hot crystal mush, a shallower section of vertically oriented, intrusive dikes,* and a volcanic surface layer of pillow basalts extruded onto the seafloor and capped by sediments. Laboratory analyses show that each of these sequences transmits sound waves with characteristi ...
geologic-geomorpho-pedologic relationships
... Soils are three-dimensional bodies covering the earth surface, meaning that they are integral parts of landscapes. This is exactly where geomorphology plays a vital role in the study of soils. Geomorphology is a branch of geology, which deals with the form of the earth, the general configuration of ...
... Soils are three-dimensional bodies covering the earth surface, meaning that they are integral parts of landscapes. This is exactly where geomorphology plays a vital role in the study of soils. Geomorphology is a branch of geology, which deals with the form of the earth, the general configuration of ...
Document
... drilling ship is equippped to drill 5 miles below the ocean surface. To date, it has drilled over 500 wells worldwide. Together with its earlier sistership, the Glomar Challenger, they have drilled over 1500 wells. ...
... drilling ship is equippped to drill 5 miles below the ocean surface. To date, it has drilled over 500 wells worldwide. Together with its earlier sistership, the Glomar Challenger, they have drilled over 1500 wells. ...
CTY Course Syllabus: Dynamic Earth
... Understanding the myth between waves and tides as sources of ocean level change, wave parts, near real time data on waves, how tides are basin-wide waves with low frequency and long wavelength Experimental process, physical modeling, stream parts, gradient and meanders, labeling and recording landfo ...
... Understanding the myth between waves and tides as sources of ocean level change, wave parts, near real time data on waves, how tides are basin-wide waves with low frequency and long wavelength Experimental process, physical modeling, stream parts, gradient and meanders, labeling and recording landfo ...
The lithosphere–asthenosphere boundary in the North
... technique. Iceland is thought to be one of the classic mantle plumes [11] interacting with a mid-ocean ridge, although this view is disputed [12]. The crustal thickness (up to 45 km) is several times thicker than that expected for oceanic crust (e.g. [13,14]). White and McKenzie [15] concluded that ...
... technique. Iceland is thought to be one of the classic mantle plumes [11] interacting with a mid-ocean ridge, although this view is disputed [12]. The crustal thickness (up to 45 km) is several times thicker than that expected for oceanic crust (e.g. [13,14]). White and McKenzie [15] concluded that ...
Rundić, Lj. Centenary anniversary of the Theory of continental drift by
... hints of continental drift in the works of Francis Bacon, and Comte de Buffon. But it was the genius of Wegener that assembled widely divergent lines of evidence into the first coherent model of continental motion. He promoted the idea that in the geological past the continental areas of the Earth c ...
... hints of continental drift in the works of Francis Bacon, and Comte de Buffon. But it was the genius of Wegener that assembled widely divergent lines of evidence into the first coherent model of continental motion. He promoted the idea that in the geological past the continental areas of the Earth c ...
SEISMIC TOMOGRAPHY OF THE ARABIAN
... Travel-Time Data and Pn and Sn Tomography An important task under this project is to collect arrival time data from seismic stations situated in more than 20 countries in the region. A significant number of these stations are in networks that are relatively new and whose data are not available from ...
... Travel-Time Data and Pn and Sn Tomography An important task under this project is to collect arrival time data from seismic stations situated in more than 20 countries in the region. A significant number of these stations are in networks that are relatively new and whose data are not available from ...
Glossary a - Teacher Friendly Guides
... a marine invertebrate animal belonging to the Phylum Brachiopoda, and characterized by upper and lower calcareous shell valves joined by a hinge, and a crown of tentacles (lophophore) used for filter feeding and respiration. Brachiopods are the most common fossil in Paleozoic sedimentary rocks. Brac ...
... a marine invertebrate animal belonging to the Phylum Brachiopoda, and characterized by upper and lower calcareous shell valves joined by a hinge, and a crown of tentacles (lophophore) used for filter feeding and respiration. Brachiopods are the most common fossil in Paleozoic sedimentary rocks. Brac ...
Continental Drift, Sea Floor Spreading and Plate
... The Himalayas resulted from a collision of the plate containing India with the plate containing Eurasia. This collision is still taking place and results in joining the two formerly separate plates. The occurrence of ancient fold -thrust mountain belts such as the Appalachian Mountains of the Easter ...
... The Himalayas resulted from a collision of the plate containing India with the plate containing Eurasia. This collision is still taking place and results in joining the two formerly separate plates. The occurrence of ancient fold -thrust mountain belts such as the Appalachian Mountains of the Easter ...
The geology and geodynamics of the
... is a modification of these two previous hypotheses with more emphasis on the lithosphere stretching with subordinate thermal effects. The Westphalian subsidence observed is considerably greater than the maximum amount of subsidence predicted by the McKenzie model, indicating that thermal subsidence ...
... is a modification of these two previous hypotheses with more emphasis on the lithosphere stretching with subordinate thermal effects. The Westphalian subsidence observed is considerably greater than the maximum amount of subsidence predicted by the McKenzie model, indicating that thermal subsidence ...
Plate Boundaries
... made notes or read additional material to clarify understanding or extend learning. ...
... made notes or read additional material to clarify understanding or extend learning. ...
Partial melting - simple process, huge global
... • When solid mixtures partially melt, it is the lower melting point materials that melt first. • Separation can occur in partial melts, with the high melting point materials sinking to the bottom and the liquid from the lower melting point materials flowing to the top. These two different materials, ...
... • When solid mixtures partially melt, it is the lower melting point materials that melt first. • Separation can occur in partial melts, with the high melting point materials sinking to the bottom and the liquid from the lower melting point materials flowing to the top. These two different materials, ...
Post-glacial rebound
Post-glacial rebound (sometimes called continental rebound) is the rise of land masses that were depressed by the huge weight of ice sheets during the last glacial period, through a process known as isostatic depression. Post-glacial rebound and isostatic depression are different parts of a process known as either glacial isostasy, glacial isostatic adjustment, or glacioisostasy. Glacioisostasy is the solid Earth deformation associated with changes in ice mass distribution. The most obvious and direct affects of post-glacial rebound are readily apparent in northern Europe (especially Scotland, Estonia, Latvia, Fennoscandia, and northern Denmark), Siberia, Canada, the Great Lakes of Canada and the United States, the coastal region of the US state of Maine, parts of Patagonia, and Antarctica. However, through processes known as ocean siphoning and continental levering, the effects of post-glacial rebound on sea-level are felt globally far from the locations of current and former ice sheets.