ANCIENT CONTINENT OPENS WINDOW ON THE EARLY EARTH
... continents. They float atop rigid plates, which are pushed around the planet by the mantle's roiling heat. Where the plates rift apart, continents are divided and new oceans form; where they collide, mountains are pushed up, or one plate often dives beneath the other in a subduction zone, fueling vo ...
... continents. They float atop rigid plates, which are pushed around the planet by the mantle's roiling heat. Where the plates rift apart, continents are divided and new oceans form; where they collide, mountains are pushed up, or one plate often dives beneath the other in a subduction zone, fueling vo ...
Rocks PowerPoint
... built up by coral animals in warm, shallow ocean water. When coral animals die, their skeletons remain and more corals build on top of them. ...
... built up by coral animals in warm, shallow ocean water. When coral animals die, their skeletons remain and more corals build on top of them. ...
Volcanogenic massive sulfide deposits host the evidence for sulfate
... Ontario, Canada, suggesting that the Archean oceans remained sulfate-rich. The only major difference between the sulfate in the Archean oceans and that in the Phanerozoic oceans was the δ 34S values, between +2 and +5‰ during the Archean, but between +10 and +35‰ for the Phanerozoic. This difference ...
... Ontario, Canada, suggesting that the Archean oceans remained sulfate-rich. The only major difference between the sulfate in the Archean oceans and that in the Phanerozoic oceans was the δ 34S values, between +2 and +5‰ during the Archean, but between +10 and +35‰ for the Phanerozoic. This difference ...
Collaborative Research: Testing the Hypothesis of Ocean Core
... mantle rocks are directly exposed on the seafloor by slip on low-angle detachment faults. OCCs have recently been shown to be a surprisingly common feature generated at slow-spreading mid-ocean ridges, with up to 50% of oceanic crustal extension and accretion accounted for by OCC-style processes. Th ...
... mantle rocks are directly exposed on the seafloor by slip on low-angle detachment faults. OCCs have recently been shown to be a surprisingly common feature generated at slow-spreading mid-ocean ridges, with up to 50% of oceanic crustal extension and accretion accounted for by OCC-style processes. Th ...
Igneous rocks lecture
... temperatures of various minerals and also found that there were two distinct progressions of mineral changes as the temperature changed: the continuous and the discontinuous series. ...
... temperatures of various minerals and also found that there were two distinct progressions of mineral changes as the temperature changed: the continuous and the discontinuous series. ...
igneous rocks
... temperatures of various minerals and also found that there were two distinct progressions of mineral changes as the temperature changed: the continuous and the discontinuous series. ...
... temperatures of various minerals and also found that there were two distinct progressions of mineral changes as the temperature changed: the continuous and the discontinuous series. ...
Answer Key for Effects of Plate Tectonics Note-taking
... beneath the lighter continental plate, into the asthenosphere. This region is called a subduction zone and the tectonic forces are so strong that a trench or crack can form in the ocean floor. ...
... beneath the lighter continental plate, into the asthenosphere. This region is called a subduction zone and the tectonic forces are so strong that a trench or crack can form in the ocean floor. ...
Classification of Metamorphic rocks based on texture
... Area surrounding the intrusion (Batholith) is heated by the magma; metamorphism is restricted to a zone surrounding the intrusion, this zone is know as METAMORPHIC AUREOLE. The rocks formed are non-foliated fine-grained rocks called as HORNFELS. ...
... Area surrounding the intrusion (Batholith) is heated by the magma; metamorphism is restricted to a zone surrounding the intrusion, this zone is know as METAMORPHIC AUREOLE. The rocks formed are non-foliated fine-grained rocks called as HORNFELS. ...
class outline - WordPress.com
... Preclass video: Students view Tectonic Plates and answer related questions in an online quiz (for example see https://geosciencevideos.files.wordpress.com/2015/05/tectonic_plates_quiz.pdf). ...
... Preclass video: Students view Tectonic Plates and answer related questions in an online quiz (for example see https://geosciencevideos.files.wordpress.com/2015/05/tectonic_plates_quiz.pdf). ...
Geologic Setting, Mineralogy, and Geochemistry of the Early Tertiary
... volcanic rocks have geochemical features typical of arc tholeiites. Dolerite dikes in the hanging wall have middle-ocean ridge basalt (MORB)-type geochemical features likely indicating deposit formation in an intra-arc extensional environment. The massive sulfide lenses are situated mainly on the ea ...
... volcanic rocks have geochemical features typical of arc tholeiites. Dolerite dikes in the hanging wall have middle-ocean ridge basalt (MORB)-type geochemical features likely indicating deposit formation in an intra-arc extensional environment. The massive sulfide lenses are situated mainly on the ea ...
The East African Rift Valley
... ridges. The East African Rift Valley is an example of a divergent boundary in an area of continental crust. It is one the geologic wonders of the world, a place where the earth's tectonic forces are presently trying to create new plates by splitting apart old ones. The East African Rift Valley forme ...
... ridges. The East African Rift Valley is an example of a divergent boundary in an area of continental crust. It is one the geologic wonders of the world, a place where the earth's tectonic forces are presently trying to create new plates by splitting apart old ones. The East African Rift Valley forme ...
The Precambrian: Hadean, Archean and Proterozoic
... • Produced by partial melting of oceanic crust in subduction zones • Tonalites- abundant plagioclase, quartz, high in Ca,Na, Al • Accretion of small islands into bigger ...
... • Produced by partial melting of oceanic crust in subduction zones • Tonalites- abundant plagioclase, quartz, high in Ca,Na, Al • Accretion of small islands into bigger ...
15.4 Marine Ecosystems
... 15.4 Marine Ecosystems The ocean can be divided into zones. • Ocean zones can be determined by their distance from shoreline and water depths. – intertidal zone—between low and high tide – neritic zone—from intertidal zone neritic zone intertidal zone to continental shelf bathmat zone – bathyal zon ...
... 15.4 Marine Ecosystems The ocean can be divided into zones. • Ocean zones can be determined by their distance from shoreline and water depths. – intertidal zone—between low and high tide – neritic zone—from intertidal zone neritic zone intertidal zone to continental shelf bathmat zone – bathyal zon ...
6.10B CLASSIFY ROCKS CLASSIFY ROCKS
... when rocks are exposed to how it forms… forms…_________________________________________ ...
... when rocks are exposed to how it forms… forms…_________________________________________ ...
Earth major plates:
... 1. Explains the global distribution of seismicity, volcanism, continental rift, and mountain building. 2. In terms of formation, destruction, and movements 3. Plate are relatively moving towards each others and changing in shapes and size. 4. Most of earthquake occurs in the boundaries. Super plume: ...
... 1. Explains the global distribution of seismicity, volcanism, continental rift, and mountain building. 2. In terms of formation, destruction, and movements 3. Plate are relatively moving towards each others and changing in shapes and size. 4. Most of earthquake occurs in the boundaries. Super plume: ...
Chapter 11 2004.ppt
... Nevada and Rocky Mountains lie within the North American Cordillera mountain range. Orogeny is an ongoing process that can last for tens of millions of years. When uplift ceases, erosive forces planes the mountains back to the land surface in < 50 million years. ...
... Nevada and Rocky Mountains lie within the North American Cordillera mountain range. Orogeny is an ongoing process that can last for tens of millions of years. When uplift ceases, erosive forces planes the mountains back to the land surface in < 50 million years. ...
Rock Star 101
... Metamorphic Rocks: associated with deep burial, mountain building and deformation of the crust ...
... Metamorphic Rocks: associated with deep burial, mountain building and deformation of the crust ...
Satellite Gravity Transforms Unmask Tectonic Pattern of Arabian
... Satellite derived geophysical gravity data are the modern powerful tool of regional tectono-geophysical examination of the Earth’s crust and upper mantle. It is well known that regional long-term seismological prognosis, strategy of searching economic deposits and many other important geological-geo ...
... Satellite derived geophysical gravity data are the modern powerful tool of regional tectono-geophysical examination of the Earth’s crust and upper mantle. It is well known that regional long-term seismological prognosis, strategy of searching economic deposits and many other important geological-geo ...
Archean
... – with numerous lakes and exposed Archean – and Proterozoic rocks thinly covered – in places by Pleistocene glacial deposits ...
... – with numerous lakes and exposed Archean – and Proterozoic rocks thinly covered – in places by Pleistocene glacial deposits ...
Directed Reading
... Directed Reading continued ______ 33. What causes a supercontinent to break apart? a. Heat inside Earth causes rifts to form in the supercontinent. b. The convergent boundary between two continents becomes ...
... Directed Reading continued ______ 33. What causes a supercontinent to break apart? a. Heat inside Earth causes rifts to form in the supercontinent. b. The convergent boundary between two continents becomes ...
Chapter 12 Thermal Energy Transfer Drives Plate Tectonics 12.1
... climates, (eg. Such as ___________________) on warm continents. Act. 12-1C – Piecing Together Pangaea 2. How Can Continents Move? • Wegener’s evidence for continental drift did ___________________ New scientific equipment _________________. It was noted that ___________________ appear in certain ...
... climates, (eg. Such as ___________________) on warm continents. Act. 12-1C – Piecing Together Pangaea 2. How Can Continents Move? • Wegener’s evidence for continental drift did ___________________ New scientific equipment _________________. It was noted that ___________________ appear in certain ...
Science multi-choice
... a. Two oceanic plates collide. b. Two continental plates collide. c. Two oceanic plates spread apart. d. None of the above. 7. Which of these statements is correct? a. Continental crust is thicker than oceanic crust. b. Continental crust is thinner than oceanic crust. c. Oceanic crust is thicker tha ...
... a. Two oceanic plates collide. b. Two continental plates collide. c. Two oceanic plates spread apart. d. None of the above. 7. Which of these statements is correct? a. Continental crust is thicker than oceanic crust. b. Continental crust is thinner than oceanic crust. c. Oceanic crust is thicker tha ...
THE FIRST SUPERCONTINENT — 1.1 BILLION YEARS AGO
... Header image shows the collisional mountain belt in Glacier National Park. Although the mountain-building event that caused these mountains is more recent than Rodinia, the rocks that are being pushed up were formed along the western margin of Laurentia while it was part of the Rodinia supercontinen ...
... Header image shows the collisional mountain belt in Glacier National Park. Although the mountain-building event that caused these mountains is more recent than Rodinia, the rocks that are being pushed up were formed along the western margin of Laurentia while it was part of the Rodinia supercontinen ...
The Structure of the Earth and Plate Tectonics
... “Plates” of lithosphere are moved around by the underlying hot mantle convection cells ...
... “Plates” of lithosphere are moved around by the underlying hot mantle convection cells ...
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.