Powerpoint
... San Andreas into Gulf of California? Related to heating and thermal weakening of the crust? Timing, T structure of crust. 3. How does/did the system propagate? From south to north, but mechanics are unknown. 4. How does locus of faulting change through time? Not clear if it follows the western bound ...
... San Andreas into Gulf of California? Related to heating and thermal weakening of the crust? Timing, T structure of crust. 3. How does/did the system propagate? From south to north, but mechanics are unknown. 4. How does locus of faulting change through time? Not clear if it follows the western bound ...
Old` Rocks Where They Shouldn`t be
... 'dating' of the limestones based as it is on the assumed evolutionary order for life's development and history. And even if these were a block of rocks 'left behind', catastrophic tectonics late in the Flood would more easily explain their current location than the tortuously slow processes of the u ...
... 'dating' of the limestones based as it is on the assumed evolutionary order for life's development and history. And even if these were a block of rocks 'left behind', catastrophic tectonics late in the Flood would more easily explain their current location than the tortuously slow processes of the u ...
Neritic Zone - SmartScience
... because they are close enough to the surface to get sun light Plankton is the most common form of plant life Seaweed is also known know as Sargasso Is well Oxygenated Contains coral reefs Phytoplankton ca reproduce extremely fast because of the sunlight and nutrients ...
... because they are close enough to the surface to get sun light Plankton is the most common form of plant life Seaweed is also known know as Sargasso Is well Oxygenated Contains coral reefs Phytoplankton ca reproduce extremely fast because of the sunlight and nutrients ...
Davidson
... Top left – Intensely flattened and isoclinally folded gneiss immediately below the Parry Sound shear zone, Ontario. Top right – Despite the effects of the Grenvillian orogeny, pre-Grenvillian history is locally preserved; here a metadiabase dyke (either ca. 1470 Ma or ca. 1240 Ma) cuts across leucos ...
... Top left – Intensely flattened and isoclinally folded gneiss immediately below the Parry Sound shear zone, Ontario. Top right – Despite the effects of the Grenvillian orogeny, pre-Grenvillian history is locally preserved; here a metadiabase dyke (either ca. 1470 Ma or ca. 1240 Ma) cuts across leucos ...
7044
... indicates that the Kola xenoliths are the high-grade metamorphic equivalents of continental flood tholeiites, emplaced into the Baltic Shield lower crust in early Proterozoic time (~2.4–2.6 Ga). Similarities in major and trace element systematics suggest that they formed in response to the same plum ...
... indicates that the Kola xenoliths are the high-grade metamorphic equivalents of continental flood tholeiites, emplaced into the Baltic Shield lower crust in early Proterozoic time (~2.4–2.6 Ga). Similarities in major and trace element systematics suggest that they formed in response to the same plum ...
Tracing meteoric fluids in fault and detachment systems
... geochemistry of fault and shear zone-related mineral proxies thus allows us to investigate the role of fluids within various compartments of continental (and in some cases oceanic) crust. Here we present select examples of hydrogen isotope geochemistry from syntectonic hydrous minerals in fault and ...
... geochemistry of fault and shear zone-related mineral proxies thus allows us to investigate the role of fluids within various compartments of continental (and in some cases oceanic) crust. Here we present select examples of hydrogen isotope geochemistry from syntectonic hydrous minerals in fault and ...
P1: Rock identification (I)
... Examine the rocks specimens provided with the aid of these notes. All the rocks come from Ireland, as detailed on the attached map. Answer the short question on each specimen in the space provided; use the notes and definitions at the end this handout. Ask the demonstrators for help if necessary. Th ...
... Examine the rocks specimens provided with the aid of these notes. All the rocks come from Ireland, as detailed on the attached map. Answer the short question on each specimen in the space provided; use the notes and definitions at the end this handout. Ask the demonstrators for help if necessary. Th ...
Name___________________________ Date: Plate Tectonics
... 6. Describe what happens when two plates carrying continental crust collide When two continental plates collide, they buckle and thicken, which pushes continental crust upward creating mountain ranges. 7. Describe what happens when a plate carrying oceanic crust collides with a plate carrying contin ...
... 6. Describe what happens when two plates carrying continental crust collide When two continental plates collide, they buckle and thicken, which pushes continental crust upward creating mountain ranges. 7. Describe what happens when a plate carrying oceanic crust collides with a plate carrying contin ...
Transient plume- to continuous plate
... In the frame of plate tectonics, the East African Rift system (EARS) is the largest active tectonic structure illustrating the early stage of continental plate fragmentation. The occurrence of continental flood basalts and large topographic plateaux has long been interpreted as witnessing the key ro ...
... In the frame of plate tectonics, the East African Rift system (EARS) is the largest active tectonic structure illustrating the early stage of continental plate fragmentation. The occurrence of continental flood basalts and large topographic plateaux has long been interpreted as witnessing the key ro ...
Cracking Up
... the Great Rift Valley, where Africa is pulling apart. Recently, that tectonic activity has gotten dramatic. In 2005, the cracking of the African Plate triggered a volcanic eruption in Ethiopia. That was followed by a series of earthquakes—the same ones the nomads felt. The earthquakes occurred as ma ...
... the Great Rift Valley, where Africa is pulling apart. Recently, that tectonic activity has gotten dramatic. In 2005, the cracking of the African Plate triggered a volcanic eruption in Ethiopia. That was followed by a series of earthquakes—the same ones the nomads felt. The earthquakes occurred as ma ...
Physical Geology - Geol 1330 (07610) - Spring
... a) thinner and hotter b) thicker and hotter c) thinner and colder d) thicker and colder 40. If two oceanic plates collide which one will subduct? a) the younger and hotter one b) the older and colder one 41. What does the Wadati-Benioff earthquake zone, which shows earthquakes down to ~600 km depth, ...
... a) thinner and hotter b) thicker and hotter c) thinner and colder d) thicker and colder 40. If two oceanic plates collide which one will subduct? a) the younger and hotter one b) the older and colder one 41. What does the Wadati-Benioff earthquake zone, which shows earthquakes down to ~600 km depth, ...
The Geological and Tectonic Framework of Europe
... the upper mantle, and is a rheologically more rigid layer lying above a more plastic layer of the upper mantle, known as the asthenosphere. The lithosphere is divided into several major tectonic plates that move relative to one another, and interact and deform, especially around their margins. Oroge ...
... the upper mantle, and is a rheologically more rigid layer lying above a more plastic layer of the upper mantle, known as the asthenosphere. The lithosphere is divided into several major tectonic plates that move relative to one another, and interact and deform, especially around their margins. Oroge ...
Plate Tectonic Vocabulary Chapter 10 Pages 239-260
... ______ 22. Supercontinents are a. large landmasses formed in the past from smaller continents. b. the large continents that exist today. c. pieces of large landmasses that broke apart. d. large oceans that covered Earth in the past. ...
... ______ 22. Supercontinents are a. large landmasses formed in the past from smaller continents. b. the large continents that exist today. c. pieces of large landmasses that broke apart. d. large oceans that covered Earth in the past. ...
Continental Formation - Department of Geosciences
... • We see these eclogites in 12 Ma volcanic rocks (as xenoliths)- we have direct evidence that they existed! • They are currently lacking beneath the Sierras; there is strong evidence that this root has foundered (sank!) in the less dense mantle • If true, we had found an elegant mechanism to making ...
... • We see these eclogites in 12 Ma volcanic rocks (as xenoliths)- we have direct evidence that they existed! • They are currently lacking beneath the Sierras; there is strong evidence that this root has foundered (sank!) in the less dense mantle • If true, we had found an elegant mechanism to making ...
6 - Bal Bharati Public School
... Hard rocks are used to make roads, houses and buildings. Stones are used for playing several games. Sculptures are also made out of rocks. Q12. Describe the rock cycle. One type of rock changes to another under specific conditions in a cyclical manner. This process of transformation of rocks from on ...
... Hard rocks are used to make roads, houses and buildings. Stones are used for playing several games. Sculptures are also made out of rocks. Q12. Describe the rock cycle. One type of rock changes to another under specific conditions in a cyclical manner. This process of transformation of rocks from on ...
History of the Earth and its structure
... crust with increasing distance from the ridges (radiometric dating) most rocks have small amounts of radioactive elements (uranium, thorium, potassium) which decay into atoms of other elements ...
... crust with increasing distance from the ridges (radiometric dating) most rocks have small amounts of radioactive elements (uranium, thorium, potassium) which decay into atoms of other elements ...
No Slide Title
... are present in cratons and show evidence of episodes of deformation accompanied by metamorphism, igneous activity and mountain building ...
... are present in cratons and show evidence of episodes of deformation accompanied by metamorphism, igneous activity and mountain building ...
Tectonic Impacts #3
... Yilgarn block begins to forms (3.5bya) Crust begins to form, rivers, igneous intrusions (3.4 – 3.09bya) Yilgarn block forms (3.09 – 2.7bya) Banded iron formations form, emerging crust, large tectonic forces (2.7 – 2.32bya) Large crustal areas form in the north coast, west coast and south coast (1.93 ...
... Yilgarn block begins to forms (3.5bya) Crust begins to form, rivers, igneous intrusions (3.4 – 3.09bya) Yilgarn block forms (3.09 – 2.7bya) Banded iron formations form, emerging crust, large tectonic forces (2.7 – 2.32bya) Large crustal areas form in the north coast, west coast and south coast (1.93 ...
Rocks
... Rocks that have changed due to temperature and pressure increases or that undergo changes in composition ...
... Rocks that have changed due to temperature and pressure increases or that undergo changes in composition ...
slyllabus
... Students have already learned crystallography, mineralogy, optical mineralogy and petrography before taking this course. So, they will continue to learn the principles behind rock forming processes and petrogenesis of igneous rocks in this course, both as means of identifying and describing the rock ...
... Students have already learned crystallography, mineralogy, optical mineralogy and petrography before taking this course. So, they will continue to learn the principles behind rock forming processes and petrogenesis of igneous rocks in this course, both as means of identifying and describing the rock ...
GEOL1010
... granite. Both the sediments and the granite are cut by a basaltic dike. What can you conclude about the relative ages of these units? a) Granite first, sediments next, basalt dike last b) Sediments first, granite next, basalt dike last c) Sediments first, granite intrusion, basalt dike last d) Basal ...
... granite. Both the sediments and the granite are cut by a basaltic dike. What can you conclude about the relative ages of these units? a) Granite first, sediments next, basalt dike last b) Sediments first, granite next, basalt dike last c) Sediments first, granite intrusion, basalt dike last d) Basal ...
Deformation - Bakersfield College
... – Large strike-slip fault that cuts through the lithosphere – Accommodates motion between two large crustal plates ...
... – Large strike-slip fault that cuts through the lithosphere – Accommodates motion between two large crustal plates ...
active geological processes controlling seismisity in northeast russia
... plates (North American, Eurasian, Okhotomorsk and Chinese) where specifical parageneses of seismogenic structures are formed. The boundary between the Eurasian and Chinese (Amurian) plates in marked by the BaikalStanovoy seismic belt representing a band of earthquake epicenters extending along the s ...
... plates (North American, Eurasian, Okhotomorsk and Chinese) where specifical parageneses of seismogenic structures are formed. The boundary between the Eurasian and Chinese (Amurian) plates in marked by the BaikalStanovoy seismic belt representing a band of earthquake epicenters extending along the s ...
Document
... Radioactive decay in the mantle heats up the overlying continental crust and causes it to bulge upward. Thus the continental crust is higher not only because of its lower density, but because it is heated up more efficiently by underlying radioactive decay in the mantle. ...
... Radioactive decay in the mantle heats up the overlying continental crust and causes it to bulge upward. Thus the continental crust is higher not only because of its lower density, but because it is heated up more efficiently by underlying radioactive decay in the mantle. ...
Theory of Plate Tectonics IV
... landmasses are separated by oceanic crust, formed during an earlier episode of seafloor spreading. As the continental blocks converge, the intervening sea floor is subducted beneath one of the plates. ...
... landmasses are separated by oceanic crust, formed during an earlier episode of seafloor spreading. As the continental blocks converge, the intervening sea floor is subducted beneath one of the plates. ...
Great Lakes tectonic zone
The Great Lakes tectonic zone is bounded by South Dakota at its tip and heads northeast to south of Duluth, Minnesota, then heads east through northern Wisconsin, Marquette, Michigan, and then trends more northeasterly to skim the northern-most shores of lakes Michigan and Huron before ending in the Sudbury, Ontario, Canada, area.During the Late Archean Era the Algoman orogeny added landmass to the Superior province by volcanic activity and continental collision along a boundary that stretches from present-day South Dakota, U.S., into the Lake Huron region near Sudbury, Ontario, Canada.This crustal boundary is the Great Lakes tectonic zone. It is 1,400 km (870 mi) long, and separates the older Archean gneissic terrane to the south from younger Late Archean greenstone-granite terrane to the north.The zone is characterized by active compression during the Algoman orogeny (about 2,700 million years ago), a pulling-apart (extensional) tectonics (2,450 to 2,100 million years ago), a second compression during the Penokean orogeny (1,900 to 1,850 million years ago), a second extension during Middle Proterozoic time (1,600 million years ago) and minor reactivation during Phanerozoic time (the past 500 million years).Collision began along the Great Lakes tectonic zone (GLTZ) with the Algoman mountain-building event and continued for tens of millions of years. During the formation of the GLTZ, the gneissic Minnesota River Valley subprovince was thrust up onto the Superior province's edge as it consumed the Superior province's oceanic crust. Fragmentation of the Kenorland supercontinent began 2,450 million years ago and was completed by 2,100 million years ago. The Wyoming province is the continental landmass that is hypothesized to have rifted away from the southern Superior province portion of Kenorland, before moving rapidly west and docking with the Laurentia supercontinent 1,850 to 1,715 million years ago. Sedimentation from the GLTZ-rifting environment continued into the Penokean orogeny, which is the next major tectonic event in the Great Lakes region. Several earthquakes have been documented in Minnesota, Michigan's Upper Peninsula and Sudbury in the last 120 years along the GLTZ.