Abstract - Geological Society of America
... of Grenville mountains and the rifting later on gave the passage to dense volcanic rocks to form the new crust i.e. Proto North America. The remaining rift basin continued to widen to form a new ocean, i.e. Iapetus (Proto Atlantic). During this time an Island Arc with deep sea flysch deposits and d ...
... of Grenville mountains and the rifting later on gave the passage to dense volcanic rocks to form the new crust i.e. Proto North America. The remaining rift basin continued to widen to form a new ocean, i.e. Iapetus (Proto Atlantic). During this time an Island Arc with deep sea flysch deposits and d ...
Rocks and Minerals - LCS Essentially Science
... • Most common crustal elements are oxygen and silicon • Bond covalently into silica tetrahedron • Tetrahedron can bond to other elements ...
... • Most common crustal elements are oxygen and silicon • Bond covalently into silica tetrahedron • Tetrahedron can bond to other elements ...
Chapter1305.ppt
... Identifying orogenies or mountain building events. Orogeny causes igneous activity, folding and faulting deformation, and metamorphism. Ancient mountain belts that have been eroded away can be identified by the features left behind and then dated using radiometric techniques. Foreland sedimentar ...
... Identifying orogenies or mountain building events. Orogeny causes igneous activity, folding and faulting deformation, and metamorphism. Ancient mountain belts that have been eroded away can be identified by the features left behind and then dated using radiometric techniques. Foreland sedimentar ...
Handout
... Identifying orogenies or mountain building events. Orogeny causes igneous activity, folding and faulting deformation, and metamorphism. Ancient mountain belts that have been eroded away can be identified by the features left behind and then dated using radiometric techniques. Foreland sedimentar ...
... Identifying orogenies or mountain building events. Orogeny causes igneous activity, folding and faulting deformation, and metamorphism. Ancient mountain belts that have been eroded away can be identified by the features left behind and then dated using radiometric techniques. Foreland sedimentar ...
Science: Directed Reading Study Guide
... The Tectonic Plate Boundaries supplement can be found on the “science assignments” page of team8a.com. ...
... The Tectonic Plate Boundaries supplement can be found on the “science assignments” page of team8a.com. ...
Material properties and microstructure from
... of the stabilitaztion of these mobile belts, which occurred between 2.1 and 2.0 Ga. However, in the east parte the syenite is placed as tabular bodies and shows gneissic texture, while in the west parte they are related to pull-part system and developt only magmatic textures. The UMPB syeinte occur ...
... of the stabilitaztion of these mobile belts, which occurred between 2.1 and 2.0 Ga. However, in the east parte the syenite is placed as tabular bodies and shows gneissic texture, while in the west parte they are related to pull-part system and developt only magmatic textures. The UMPB syeinte occur ...
The Penokean orogeny in the Lake Superior region
... Formations). A thick succession of arc-derived turbidites constitutes most of the foreland basin-fill along with lesser volcanic rocks. In the southern fold and thrust belt tectonic thickening resulted in high-grade metamorphism of the sediments by 1830 Ma. At this same time, a suite of post-tectoni ...
... Formations). A thick succession of arc-derived turbidites constitutes most of the foreland basin-fill along with lesser volcanic rocks. In the southern fold and thrust belt tectonic thickening resulted in high-grade metamorphism of the sediments by 1830 Ma. At this same time, a suite of post-tectoni ...
8.9AB Plate Tectonic Theory
... away from each other; on land creates rift valleys, on the sea floor creates new ocean crust ...
... away from each other; on land creates rift valleys, on the sea floor creates new ocean crust ...
8.3 – What is Seafloor Spreading?
... 1. Scientists think that the movement of tectonic plates is caused by a. conveyor belts b. heat in Earth’s core. c. pressure in Earth’s crust. d. convection currents. ...
... 1. Scientists think that the movement of tectonic plates is caused by a. conveyor belts b. heat in Earth’s core. c. pressure in Earth’s crust. d. convection currents. ...
8.9AB Plate Tectonic Theory
... away from each other; on land creates rift valleys, on the sea floor creates new ocean crust ...
... away from each other; on land creates rift valleys, on the sea floor creates new ocean crust ...
Formation and evolution of Irish passive margins: implications for
... both the West Hatton margin (WHM) and the south Rockall/Hatton margin (SHRM). The WHM represents a Late Paleocene-Early Eocene volcanic margin, as suggested by the typical volcano-stratigraphic sequence (Inner SDRs, Outer High, Outer SDRs, oceanic crust) observed near the beakup axis. The Inner SDR ...
... both the West Hatton margin (WHM) and the south Rockall/Hatton margin (SHRM). The WHM represents a Late Paleocene-Early Eocene volcanic margin, as suggested by the typical volcano-stratigraphic sequence (Inner SDRs, Outer High, Outer SDRs, oceanic crust) observed near the beakup axis. The Inner SDR ...
the archean granites of mumias–kakamega
... magmas formed by partial melting of protoliths with short prior residence time in the crust thus the granitic crust underlying Tanzania and parts of Uganda and Kenya (with reference to western granites) formed about 2.8 Ga and 2.4 Ga. Huddlestone et al. (1959), states that the Archean Maragoli grani ...
... magmas formed by partial melting of protoliths with short prior residence time in the crust thus the granitic crust underlying Tanzania and parts of Uganda and Kenya (with reference to western granites) formed about 2.8 Ga and 2.4 Ga. Huddlestone et al. (1959), states that the Archean Maragoli grani ...
Rodinia supercontinent break-up: Not a result of Superplume tectonics
... This superplume analogy does not explain the tectono-thermal energy required for the assembly of Rodinia; this can only be explained by plate dynamics. The same process accounts for break-up of the supercontinent under changed tectono-thermal conditions. There is an absence of widespread deep-seate ...
... This superplume analogy does not explain the tectono-thermal energy required for the assembly of Rodinia; this can only be explained by plate dynamics. The same process accounts for break-up of the supercontinent under changed tectono-thermal conditions. There is an absence of widespread deep-seate ...
Penrose_Lesher - The University of Texas at Dallas
... Implications Max T of plumes (and therefore also ambient mantle…) was much higher in the Archean than in the Proterozoic-Phanerozoic Much hotter mantle in Archean means: lower viscosity mantle, faster plate motion ...
... Implications Max T of plumes (and therefore also ambient mantle…) was much higher in the Archean than in the Proterozoic-Phanerozoic Much hotter mantle in Archean means: lower viscosity mantle, faster plate motion ...
Layers of the Earth, Continental Drift, and Plate Tectonic Overview
... 11. Name and describe the type of tectonic stress that forms folded mountains. 12. Name and describe the type of tectonic stress that forms fault-block mountains. 13. If the Earth's crust is growing at mid-ocean ridges, why doesn't the Earth itself grow larger? 14. What was Pangaea? 15. Where would ...
... 11. Name and describe the type of tectonic stress that forms folded mountains. 12. Name and describe the type of tectonic stress that forms fault-block mountains. 13. If the Earth's crust is growing at mid-ocean ridges, why doesn't the Earth itself grow larger? 14. What was Pangaea? 15. Where would ...
Metamorphism and tectonics
... maximum T calculated for each metamorphic zone. According to England and Richardson (1977), the metamorphic field gradient has little physical meaning because peak temperatures in each metamorphic zone were reached at different times during the metamorphic history of the area. An overview of metamor ...
... maximum T calculated for each metamorphic zone. According to England and Richardson (1977), the metamorphic field gradient has little physical meaning because peak temperatures in each metamorphic zone were reached at different times during the metamorphic history of the area. An overview of metamor ...
The Outer Core - Geography1000
... The Inner and Outer Core • The Outer Core Molten and extending to a depth of about 3100 miles • The Inner Core • Solid and very dense mass having a radius of 900 miles • Both the inner and outer core are made of iron/nickel or iron/silicate. • Makes up 15% of the Earth’s volume and 32% of its mass ...
... The Inner and Outer Core • The Outer Core Molten and extending to a depth of about 3100 miles • The Inner Core • Solid and very dense mass having a radius of 900 miles • Both the inner and outer core are made of iron/nickel or iron/silicate. • Makes up 15% of the Earth’s volume and 32% of its mass ...
Galana River area in SE Kenya, four tectonostratigraphic units can
... granulite facies metamor-phism (~644-629 Ma) is found in domains showing S-SW directed low angle thrusting (Taita Hills) and NNW-SSE strike slip deformation (western Galana River). In an eastward direction, a late Pan-African granulite facies metamorphism (~550 Ma) occurs in a domain where structure ...
... granulite facies metamor-phism (~644-629 Ma) is found in domains showing S-SW directed low angle thrusting (Taita Hills) and NNW-SSE strike slip deformation (western Galana River). In an eastward direction, a late Pan-African granulite facies metamorphism (~550 Ma) occurs in a domain where structure ...
Pangea Breaks Up!
... Linear Seas: Red Sea, Dead Sea, Persian Gulf ► What would be the geologic record of this? ► What happens to the tectonic activity on the edges of the continents? ...
... Linear Seas: Red Sea, Dead Sea, Persian Gulf ► What would be the geologic record of this? ► What happens to the tectonic activity on the edges of the continents? ...
Rocks
... Fire Rocks Formed underground by trapped, cooled magma Formed above ground when volcanoes erupt and magma cools ...
... Fire Rocks Formed underground by trapped, cooled magma Formed above ground when volcanoes erupt and magma cools ...
Rocks - I Teach Bio
... Fire Rocks Formed underground by trapped, cooled magma Formed above ground when volcanoes erupt and magma cools ...
... Fire Rocks Formed underground by trapped, cooled magma Formed above ground when volcanoes erupt and magma cools ...
Relative Age of Rocks
... •Sasha is 16 years old. •Ashley is older than Melony, but younger than Sasha. ...
... •Sasha is 16 years old. •Ashley is older than Melony, but younger than Sasha. ...
What is a plate boundary?
... Earth's layers. One way, shown on the left, is based on composition (what the layers are made of). The other way, shown on the right, is based on physical properties of the layers (solid vs. liquid, rigid vs. soft, etc.). These may also be called zones. In most cases, the boundaries between the phys ...
... Earth's layers. One way, shown on the left, is based on composition (what the layers are made of). The other way, shown on the right, is based on physical properties of the layers (solid vs. liquid, rigid vs. soft, etc.). These may also be called zones. In most cases, the boundaries between the phys ...
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.