The Cordero discovery Chihuahua, Mexico: A novel Ag, Au, Zn, Pb
... generally well mineralized in contact zones of the domes and subvolcanic intrusives and range from potassic to chloritic hornfels to manto replacements. Rusty weathering carbonate proxies for silica in all alteration assemblages in the upper 200-300 m of the system. Silica is present and increasingl ...
... generally well mineralized in contact zones of the domes and subvolcanic intrusives and range from potassic to chloritic hornfels to manto replacements. Rusty weathering carbonate proxies for silica in all alteration assemblages in the upper 200-300 m of the system. Silica is present and increasingl ...
Radiogenic isotope-3He/4He-δ18O relationships for global
... a single location but vary slightly between locations (see Supplementary Information), consistent with the analysis of Jackson et al. (2007). Samples that approach endmember compositions, i.e. EM1 (Pitcairn, Rejuvenated Samoa, Hawaiian Koolau Component), EM2 (Malu Component Samoa), Kea trend, and HI ...
... a single location but vary slightly between locations (see Supplementary Information), consistent with the analysis of Jackson et al. (2007). Samples that approach endmember compositions, i.e. EM1 (Pitcairn, Rejuvenated Samoa, Hawaiian Koolau Component), EM2 (Malu Component Samoa), Kea trend, and HI ...
On the influence of the asthenospheric flow on the tectonics and
... usual crust-mantle-asthenosphere stratification and imply vigorous sub-crustal motion is, at best, speculative. Moreover, neglecting depth-dependent behaviour across southeast Asia may be inappropriate if the lower crust beneath Tibet is weaker relative to the upper crust (Nelson et al., 1996; Xu et ...
... usual crust-mantle-asthenosphere stratification and imply vigorous sub-crustal motion is, at best, speculative. Moreover, neglecting depth-dependent behaviour across southeast Asia may be inappropriate if the lower crust beneath Tibet is weaker relative to the upper crust (Nelson et al., 1996; Xu et ...
The evolution of the southern Cordilleran foreland thrust and fold
... faults and folds. Thus, reliable regional palinspastic reconstructions can be produced by considering balanced maps of only the small number of very large faults. The most important of the fault maps is the footwall map of the regional décollement that defines the base of the thrust and fold belt, a ...
... faults and folds. Thus, reliable regional palinspastic reconstructions can be produced by considering balanced maps of only the small number of very large faults. The most important of the fault maps is the footwall map of the regional décollement that defines the base of the thrust and fold belt, a ...
Earthquakes
... rocks begin to slide past each other • It is usually below the surface • The sudden motion causes vibrations to spread out from the focus • These vibrations travel through the crust in the form of waves ...
... rocks begin to slide past each other • It is usually below the surface • The sudden motion causes vibrations to spread out from the focus • These vibrations travel through the crust in the form of waves ...
Document
... Plate Tectonics This type of boundary occurs when two plates slide past each other, this is occurring in California with the Juan de Fuca plate and the North American plate. a) transform b) convergent c) subduction d) divergent ...
... Plate Tectonics This type of boundary occurs when two plates slide past each other, this is occurring in California with the Juan de Fuca plate and the North American plate. a) transform b) convergent c) subduction d) divergent ...
Natural Hazards - Cal State LA
... • Risk Maps – Based on past activity, frequency, and magnitude ...
... • Risk Maps – Based on past activity, frequency, and magnitude ...
Big Ideas - SERC
... Constructing Activities Based on “Grand Challenges” Michael Wysession Washington University St. Louis, MO ...
... Constructing Activities Based on “Grand Challenges” Michael Wysession Washington University St. Louis, MO ...
earth science for foreign students
... topics in geology, oceanography, and geophysics. Emphasis will be put on aspects of Icelandic geology like volcanic and geothermal activity, glaciers and plate tectonics, as well as the North Atlantic Ocean. The course should be suitable for Erasmus exchange students from the EU and others who want ...
... topics in geology, oceanography, and geophysics. Emphasis will be put on aspects of Icelandic geology like volcanic and geothermal activity, glaciers and plate tectonics, as well as the North Atlantic Ocean. The course should be suitable for Erasmus exchange students from the EU and others who want ...
EPS 101 Student Learning Outcomes 1. By evaluating a
... Outcome #8: Students will be able to describe the geologic processes involved in formation and concentration of a significant geologic resource (examples include fossil fuels and metals). Rubric to ...
... Outcome #8: Students will be able to describe the geologic processes involved in formation and concentration of a significant geologic resource (examples include fossil fuels and metals). Rubric to ...
Postglacial Rebound & Mantle Flow
... • Continental shelves and their adjacent oceanic abyssal plains differ in elevation by ~5-6km (5000m) • Mean density of continental crust is 2800 kg/m3 (2.8Mg/m3) • Pressure at base of continents (compensation depth) is 2800 kg/m3 x 10 m/s2 x 40,000m = 1.1GPa (1.1GN/m2) • Net horizontal force F =1.1 ...
... • Continental shelves and their adjacent oceanic abyssal plains differ in elevation by ~5-6km (5000m) • Mean density of continental crust is 2800 kg/m3 (2.8Mg/m3) • Pressure at base of continents (compensation depth) is 2800 kg/m3 x 10 m/s2 x 40,000m = 1.1GPa (1.1GN/m2) • Net horizontal force F =1.1 ...
Volcanoes
... Can eruptions be predicted? Why do people live in volcanic areas? Summary activities The key concepts covered are: Place, Space and Physical and human processes. ...
... Can eruptions be predicted? Why do people live in volcanic areas? Summary activities The key concepts covered are: Place, Space and Physical and human processes. ...
Effects of Volcanic Eruptions
... can block enough sunlight to cause global temperatures to drop. Such a change in temperature can disrupt climates all over the world. ...
... can block enough sunlight to cause global temperatures to drop. Such a change in temperature can disrupt climates all over the world. ...
Magnitude 7.1 SOUTHERN EAST PACIFIC RISE
... This earthquake resulted from oblique thrust faulting at a depth of approximately 15.5 km. According to the USGS, moderate sized earthquakes are not uncommon in this region, though events of this size are rare. Fifteen other M 6+ earthquakes have occurred within 500 km of this earthquake over the pa ...
... This earthquake resulted from oblique thrust faulting at a depth of approximately 15.5 km. According to the USGS, moderate sized earthquakes are not uncommon in this region, though events of this size are rare. Fifteen other M 6+ earthquakes have occurred within 500 km of this earthquake over the pa ...
Reasons and types of plate movement
... Convergent: two or more plates moving toward each other Divergent: two or more plates moving away from each other Transform: two plates that are next to each other move parallel to each other in opposite directions. ...
... Convergent: two or more plates moving toward each other Divergent: two or more plates moving away from each other Transform: two plates that are next to each other move parallel to each other in opposite directions. ...
Terrestrial planets fractionated synchronously
... thermodynamics and ignore radioactivity. The popular models are extrapolated from 1970s and 1980s speculations regarding Earth: all three planets are still only partly fractionated and have perpetually hot cores that maintain whole-mantle convection. Divergent conjectures have been added for each pl ...
... thermodynamics and ignore radioactivity. The popular models are extrapolated from 1970s and 1980s speculations regarding Earth: all three planets are still only partly fractionated and have perpetually hot cores that maintain whole-mantle convection. Divergent conjectures have been added for each pl ...
Earthquakes
... P waves (primary waves)- longitudinal waves similar to sound waves Move through solid and liquid material Compress and expand the ground Similar to an accordion or a slinky ...
... P waves (primary waves)- longitudinal waves similar to sound waves Move through solid and liquid material Compress and expand the ground Similar to an accordion or a slinky ...
Chapter 5 Metamorphic Rocks Notes
... COMMON METAMORPHIC ROCKS • 2 types: Foliated & Non-foliated ...
... COMMON METAMORPHIC ROCKS • 2 types: Foliated & Non-foliated ...
insight into the origin of silicic rocks in northwestern iceland
... and 5% volcanic sediment (Saemundsson, 1979). The basalts can be attributed to rifting processes, leading to fissure eruptions. Silicic rock origin in Iceland is linked to a combination of fractional crystallization, crustal remelting, and magma mixing (Gunnarsson et al., 1998). These processes gene ...
... and 5% volcanic sediment (Saemundsson, 1979). The basalts can be attributed to rifting processes, leading to fissure eruptions. Silicic rock origin in Iceland is linked to a combination of fractional crystallization, crustal remelting, and magma mixing (Gunnarsson et al., 1998). These processes gene ...
Tick, Tick, Boom Danger Zone
... Danger Zone Volcanoes are a huge hazard around the world, they exist almost everywhere, but they “commonly form along convergent plate boundaries”(Holt, ...
... Danger Zone Volcanoes are a huge hazard around the world, they exist almost everywhere, but they “commonly form along convergent plate boundaries”(Holt, ...
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.