ch 4
... In contrast to the events of the more distant past, the events of this episode have preserved a true abundance of information on the course of geologic evolution here. We can map the appearance of magma species, the orientation and magnitude of folds, the character and displacement of faults, and w ...
... In contrast to the events of the more distant past, the events of this episode have preserved a true abundance of information on the course of geologic evolution here. We can map the appearance of magma species, the orientation and magnitude of folds, the character and displacement of faults, and w ...
4. Kittitas Valley
... The flows of the Grand Ronde member of the Columbia River Basalts are basalt. Locally, flows include a pillow-palagonite complex at their base, a reflection of the wet landscape which persisted between eruptive events. Elsewhere these flows display classic columnar structure, a reflection of the cooling ...
... The flows of the Grand Ronde member of the Columbia River Basalts are basalt. Locally, flows include a pillow-palagonite complex at their base, a reflection of the wet landscape which persisted between eruptive events. Elsewhere these flows display classic columnar structure, a reflection of the cooling ...
SeiSmological grand challengeS in UnderStanding earth`S
... Maintaining a healthy national research capability in seismology to pursue the many societally important applications of the discipline and to address the 10 Grand Challenge research questions requires sustained and expanded support of seismic data acquisition, archival, and distribution facilities ...
... Maintaining a healthy national research capability in seismology to pursue the many societally important applications of the discipline and to address the 10 Grand Challenge research questions requires sustained and expanded support of seismic data acquisition, archival, and distribution facilities ...
GLG101online_09B_MountainsoftheWorld_MCC_Leighty
... through this learning adventure. Remember, email Dr. Bob if you have any questions about today’s lecture ([email protected]). Leave no questions behind! ...
... through this learning adventure. Remember, email Dr. Bob if you have any questions about today’s lecture ([email protected]). Leave no questions behind! ...
Document
... caused by horizontal compression, the two blocks of rock move laterally past each other- the San Andreas and Hayward fault are both strike-slip faults QuickTim e™ and a TIFF (Uncom pres s ed) decom pres sor are needed to s ee this picture. ...
... caused by horizontal compression, the two blocks of rock move laterally past each other- the San Andreas and Hayward fault are both strike-slip faults QuickTim e™ and a TIFF (Uncom pres s ed) decom pres sor are needed to s ee this picture. ...
Geodynamics of the Yellowstone hotspot and mantle plume: Seismic
... plate motion value was nearly identical to the direction determined by Armstrong et al. (1975, 1977) for the apparent motion of silicic age progression of the YSRP. Smith and Sbar (1974) also speculated on the process of plate-plume interaction, i.e. basal lithospheric shearing that accelerated the ...
... plate motion value was nearly identical to the direction determined by Armstrong et al. (1975, 1977) for the apparent motion of silicic age progression of the YSRP. Smith and Sbar (1974) also speculated on the process of plate-plume interaction, i.e. basal lithospheric shearing that accelerated the ...
BW02 - Ispra
... Many of the IUP rocks display very high Mg# (Mg/ Mg+Fe2+) values in both bulk rocks and constituent minerals, indicating a derivation from a primitive, possibly primary magma. Primary characteristics of the magma have been preserved by a rapid ascent through the lithosphere, as suggested by the pres ...
... Many of the IUP rocks display very high Mg# (Mg/ Mg+Fe2+) values in both bulk rocks and constituent minerals, indicating a derivation from a primitive, possibly primary magma. Primary characteristics of the magma have been preserved by a rapid ascent through the lithosphere, as suggested by the pres ...
Crustal structure of the convergent plate-boundary zone
... Taiwan is displayed by map views at 13, 17, and 25 km depths in Figure 3 and by a series of east-trending cross sections, arranged from north to south in Figure 4. Both figures reveal particularly strong velocity variations in the middle crust where the spread function indicates that the model resol ...
... Taiwan is displayed by map views at 13, 17, and 25 km depths in Figure 3 and by a series of east-trending cross sections, arranged from north to south in Figure 4. Both figures reveal particularly strong velocity variations in the middle crust where the spread function indicates that the model resol ...
Dynamical geochemistry of the mantle
... The second argument is that seismic tomography detects subducted lithosphere extending from surface subduction zones through the transition zone and deep into the lower mantle (Grand et al., 1997). The associated mass flow implies that a compositional difference would be removed within less than a b ...
... The second argument is that seismic tomography detects subducted lithosphere extending from surface subduction zones through the transition zone and deep into the lower mantle (Grand et al., 1997). The associated mass flow implies that a compositional difference would be removed within less than a b ...
PDF
... New continental crust also forms where thick piles of oceanic crust – oceanic plateaux, formed above mantle “hotspots” – collide with arcs, such as the Miocene collision of the Ontong-Java Plateau with the Solomon arc (Mann and Taira, 2004). Continued subduction as a result of subduction polarity re ...
... New continental crust also forms where thick piles of oceanic crust – oceanic plateaux, formed above mantle “hotspots” – collide with arcs, such as the Miocene collision of the Ontong-Java Plateau with the Solomon arc (Mann and Taira, 2004). Continued subduction as a result of subduction polarity re ...
Array Seismology Advances Research Into Earth`s Interior
... J-Array data combined with coherency measures resolved two non-planar lower mantle P-wave discontinuities [Kito and Krüger, 2001]. Arrays are especially valuable for detecting low-amplitude arrivals commonly below noise levels on single seismograms (Figures 2b and 2c), such as energy generated by sm ...
... J-Array data combined with coherency measures resolved two non-planar lower mantle P-wave discontinuities [Kito and Krüger, 2001]. Arrays are especially valuable for detecting low-amplitude arrivals commonly below noise levels on single seismograms (Figures 2b and 2c), such as energy generated by sm ...
The placement of the Trans-European Suture Zone on the Romanian... electromagnetic arguments
... Carpathians, in east. In these circumstances a direct geological investigation is not possible at all. On the Romanian territory the TESZ is covered by the Carpathian thrust-belt of Alpine age and because of this reason just a few methods are available to decipher it. In general, the attempts of inv ...
... Carpathians, in east. In these circumstances a direct geological investigation is not possible at all. On the Romanian territory the TESZ is covered by the Carpathian thrust-belt of Alpine age and because of this reason just a few methods are available to decipher it. In general, the attempts of inv ...
rocks - Cobb Learning
... A rock’s grains give it its texture. There are three major groups of rocks: igneous rock, sedimentary rock, and metamorphic rock. These terms refer to how the rocks in each group were formed (origin). ...
... A rock’s grains give it its texture. There are three major groups of rocks: igneous rock, sedimentary rock, and metamorphic rock. These terms refer to how the rocks in each group were formed (origin). ...
Tracing the evolving flux from the subducting plate in the Tonga
... difficult task due to the large number of potential variables compared to the relatively straight forward decompression melting of a mid ocean ridge system. In most subduction systems the arc volcanic front is located over the dewatering slab at around 100 km depth (Tatsumi et al., 1983). The fluid ...
... difficult task due to the large number of potential variables compared to the relatively straight forward decompression melting of a mid ocean ridge system. In most subduction systems the arc volcanic front is located over the dewatering slab at around 100 km depth (Tatsumi et al., 1983). The fluid ...
Structural Geology, Holloway Mine, Abitibi
... within the Holloway mine and to determine their relationship to mineralization. Second, this study identified and described those structures associated with the PDDZ in order to shed new light on its place within the larger tectonic history of the Abitibi greenstone belt. Work began in the summer of ...
... within the Holloway mine and to determine their relationship to mineralization. Second, this study identified and described those structures associated with the PDDZ in order to shed new light on its place within the larger tectonic history of the Abitibi greenstone belt. Work began in the summer of ...
Mantle-derived magmas and magmatic Ni-Cu-(PGE) deposits
... Melting can occur via a variety of different physical processes, including: 1) equilibrium (batch) melting in which the melt remains in equilibrium with the source, resulting in only moderate fractionation of highly from moderately incompatible elements; 2) fractional melting, in which the melt is c ...
... Melting can occur via a variety of different physical processes, including: 1) equilibrium (batch) melting in which the melt remains in equilibrium with the source, resulting in only moderate fractionation of highly from moderately incompatible elements; 2) fractional melting, in which the melt is c ...
Numerical models of subduction and forearc deformation
... that known deformations between major earthquakes are best explained by a vertical force acting downward on the base of the lithosphere in the vicinity of the trench. Such a force could be caused by pull of the dense subducted lithosphere. Stresses resulting from this force system are illustrated in ...
... that known deformations between major earthquakes are best explained by a vertical force acting downward on the base of the lithosphere in the vicinity of the trench. Such a force could be caused by pull of the dense subducted lithosphere. Stresses resulting from this force system are illustrated in ...
Overview of EarthScope: USArray and the Plate Boundary Observatory
... Can download data to spreadsheet and determine best-fit slopes = Rates of north and east motion ...
... Can download data to spreadsheet and determine best-fit slopes = Rates of north and east motion ...
The Patrimonial Value of the Betic Ophiolites: Rocks from the
... The Betic Ophiolites are represented by numerous tectonic slabs ranging in size from metres to kilometres and made up of metamorphosed ultramafic, basic and/or sedimentary rocks, whose outcrops are found discontinuously between the provinces of Granada and Murcia (Fig. 3). This figure shows the loca ...
... The Betic Ophiolites are represented by numerous tectonic slabs ranging in size from metres to kilometres and made up of metamorphosed ultramafic, basic and/or sedimentary rocks, whose outcrops are found discontinuously between the provinces of Granada and Murcia (Fig. 3). This figure shows the loca ...
Planet Earth in a Nutshell
... from the simplest one-celled organisms to the most complex ones like human beings. The origin of Earth has always been a mystery for humans. According to the currently accepted theory our Solar System began as a spinning cloud of gas and dust – with an initial mass only 10 to 20 percent larger than ...
... from the simplest one-celled organisms to the most complex ones like human beings. The origin of Earth has always been a mystery for humans. According to the currently accepted theory our Solar System began as a spinning cloud of gas and dust – with an initial mass only 10 to 20 percent larger than ...
1 CONTENTS Overall course learning goals for GEOL 1010: 1st draft
... 5. Students will understand how mineral assemblages (rocks) form at characteristic temperature and pressure conditions and from characteristic chemical compositions. 6. Students will understand how and why rocks and minerals are distributed on and in Earth (particularly felsic and mafic rocks). 7. S ...
... 5. Students will understand how mineral assemblages (rocks) form at characteristic temperature and pressure conditions and from characteristic chemical compositions. 6. Students will understand how and why rocks and minerals are distributed on and in Earth (particularly felsic and mafic rocks). 7. S ...
Basement Lithologic Framework and Structural Features of the
... The final phase of field work of the Western Athabasca Basement Project included core logging in the Hook Lake and Carswell areas. The Careen Lake Group supracrustal package at Hook Lake is dominated by psammites and quartzites with subordinate psammopelites and migmatitic to diatexitic pelites. It ...
... The final phase of field work of the Western Athabasca Basement Project included core logging in the Hook Lake and Carswell areas. The Careen Lake Group supracrustal package at Hook Lake is dominated by psammites and quartzites with subordinate psammopelites and migmatitic to diatexitic pelites. It ...
GUIDE TO THE GEOLOGY OF BRADGATE PARK AND
... however, it is clear that more isotopic determinations will be needed in order to constrain the entire age-range of the succession. Mode of origin of the Charnian Supergroup Evidence concerning the mode of formation of the Charnian sequence is at first sight contradictory. In the south and east - f ...
... however, it is clear that more isotopic determinations will be needed in order to constrain the entire age-range of the succession. Mode of origin of the Charnian Supergroup Evidence concerning the mode of formation of the Charnian sequence is at first sight contradictory. In the south and east - f ...
Large igneous province
A large igneous province (LIP) is an extremely large accumulation of igneous rocks, including liquid rock (intrusive) or volcanic rock formations (extrusive), when hot magma extrudes from inside the Earth and flows out. The source of many or all LIPs is variously attributed to mantle plumes or to processes associated with plate tectonics. Types of LIPs can include large volcanic provinces (LVP), created through flood basalt and large plutonic provinces (LPP). Eleven distinct flood basalt episodes occurred in the past 250 million years, creating volcanic provinces, which coincided with mass extinctions in prehistoric times. Formation depends on a range of factors, such as continental configuration, latitude, volume, rate, duration of eruption, style and setting (continental vs. oceanic), the preexisting climate state, and the biota resilience to change.