Brief overview of North American Cordilleran geology by Cin
... arc magmatism cuts off, and then sweeps eastward cuts off and then sweeps eastward ...
... arc magmatism cuts off, and then sweeps eastward cuts off and then sweeps eastward ...
Rocks Section 4
... The diagram below shows how the type of rock that forms during meta-morphism indicates the conditions under which the metamorphism occurred. ...
... The diagram below shows how the type of rock that forms during meta-morphism indicates the conditions under which the metamorphism occurred. ...
Answers to Plate Tectonics Study Guide
... Inner Core is a ball of hot, solid metals and is under enormous pressure Outer core is a layer of liquid metals (pressure and temp. are lower) Mantle is Earth’s thickest layer made up of hot rock, similar to a thick paste Crust is a thin layer of cool rock Two types of crust: oceanic (thin ...
... Inner Core is a ball of hot, solid metals and is under enormous pressure Outer core is a layer of liquid metals (pressure and temp. are lower) Mantle is Earth’s thickest layer made up of hot rock, similar to a thick paste Crust is a thin layer of cool rock Two types of crust: oceanic (thin ...
שקופית 1
... Paired metamorphic facies are common in subduction zone tectonic environments. Ocean floor basalts exposed to variable pressures and temperatures form well-foliated greenschists and amphibolites, or weakly-foliated blueschists and eclogites. ...
... Paired metamorphic facies are common in subduction zone tectonic environments. Ocean floor basalts exposed to variable pressures and temperatures form well-foliated greenschists and amphibolites, or weakly-foliated blueschists and eclogites. ...
Chapter 10 Whole Notes
... Basalt is the iron-rich, volcanic rock making up the ocean floor-- contains a strongly magnetic mineral known as magnetite. When magma solidifies, the magnetite in the magma with Earth’s magnetic field. ...
... Basalt is the iron-rich, volcanic rock making up the ocean floor-- contains a strongly magnetic mineral known as magnetite. When magma solidifies, the magnetite in the magma with Earth’s magnetic field. ...
Introduction
... distribution and orientation of features within the earth crust Kinematic model: Specific history of motion that could have carried the system from an undeformed to its deformed state (or from one configuration to another) Plate tectonic model is a kinematic model ...
... distribution and orientation of features within the earth crust Kinematic model: Specific history of motion that could have carried the system from an undeformed to its deformed state (or from one configuration to another) Plate tectonic model is a kinematic model ...
Table of Contents - Mr. Tobin's Earth Science Class
... processes by which rocks are metamorphosed. ...
... processes by which rocks are metamorphosed. ...
Field Relationships and Kinematic Indicators in the Virgin River
... The well exposed Virgin River Schist Group (VRSG) consists of psammopelitic metasediments and possible metatuffs bounding a thin continuous unit of metabasalt. The VRSG is cut by tourmaline-bearing pegmatites but lacks the mafic dykes common in the shear zone. The contact between the VRSG and the ma ...
... The well exposed Virgin River Schist Group (VRSG) consists of psammopelitic metasediments and possible metatuffs bounding a thin continuous unit of metabasalt. The VRSG is cut by tourmaline-bearing pegmatites but lacks the mafic dykes common in the shear zone. The contact between the VRSG and the ma ...
Characteristics of Earthquakes Located In the Magadi Area, Kenya
... Magadi area is located in the southern part of the Kenyan rift, an active continental rift that is part of the East African Rift system (EARS). Local seismic activity monitored previously around Lake Magadi revealed an earthquake cluster caused by swarm activity in the rift center at shallow depths, ...
... Magadi area is located in the southern part of the Kenyan rift, an active continental rift that is part of the East African Rift system (EARS). Local seismic activity monitored previously around Lake Magadi revealed an earthquake cluster caused by swarm activity in the rift center at shallow depths, ...
Geology: Cryptic crustal events elucidated through
... generated in or passed through continental crust that included both Grenville and Late Archean components, implying that the eastern Blue Ridge remained connected to the same, or very similar, deep crust during the Taconic to Acadian interval represented by these intrusions. The very strong inherita ...
... generated in or passed through continental crust that included both Grenville and Late Archean components, implying that the eastern Blue Ridge remained connected to the same, or very similar, deep crust during the Taconic to Acadian interval represented by these intrusions. The very strong inherita ...
Death Valley through time
... low relief. Beginning in Miocene time, the geologic tranquility was shattered. Volcanism and faulting started up again, but this time caused by extension in the crust rather than compression. The birth of the Death Valley landscape familiar to us today was beginning. Usually younger geologic events ...
... low relief. Beginning in Miocene time, the geologic tranquility was shattered. Volcanism and faulting started up again, but this time caused by extension in the crust rather than compression. The birth of the Death Valley landscape familiar to us today was beginning. Usually younger geologic events ...
Evolution of the East African and related orogens, and the assembly
... has been attributed to the difference in the level of exposure, with the Mozambican rocks interpreted as lower crustal equivalents of the juvenile rocks in the Arabian–Nubian Shield. Recent geochronologic data indicate the presence of two major Pan-African tectonic events in East Africa. The East Af ...
... has been attributed to the difference in the level of exposure, with the Mozambican rocks interpreted as lower crustal equivalents of the juvenile rocks in the Arabian–Nubian Shield. Recent geochronologic data indicate the presence of two major Pan-African tectonic events in East Africa. The East Af ...
brodie park time walk brodie park time walk
... Australia became increasingly arid. Rainforest that had spread across much of southern Australia disappeared and grasslands developed. Although Australia’s climate was drying, during sustained wet periods in this region, two different types of weathering products developed over the landscape. Deep l ...
... Australia became increasingly arid. Rainforest that had spread across much of southern Australia disappeared and grasslands developed. Although Australia’s climate was drying, during sustained wet periods in this region, two different types of weathering products developed over the landscape. Deep l ...
Ch. 2 rocks
... The transition of one rock into another by temperatures and/or pressures unlike those in which it formed. Metamorphic rocks are produced from • Igneous rocks • Sedimentary rocks • Other metamorphic rocks ...
... The transition of one rock into another by temperatures and/or pressures unlike those in which it formed. Metamorphic rocks are produced from • Igneous rocks • Sedimentary rocks • Other metamorphic rocks ...
geologic map (scale 1 :250000) of the penokean orogen, central
... orogen is inferred to consist of a deformed foreland basin or tectonic foredeep, encompassing the main bowl of the Animikie basin together with the newly recognized Long Prairie basin and Nimrod outlier, and a structurally and stratigraphically complex fold-and-thrust belt, encompassing the Cuyuna d ...
... orogen is inferred to consist of a deformed foreland basin or tectonic foredeep, encompassing the main bowl of the Animikie basin together with the newly recognized Long Prairie basin and Nimrod outlier, and a structurally and stratigraphically complex fold-and-thrust belt, encompassing the Cuyuna d ...
Petrography and geochemistry of Khewra Trap, a unique
... troughs. Primitive-mantle normalized spidergram of the KT were compared withvolcanic rocks from different tectonic settingsd There is close similarity in the patterns of the spidergrams of the KT analyses and the Santorini lava of the Aegean island arc. The major elements group the KT with continen ...
... troughs. Primitive-mantle normalized spidergram of the KT were compared withvolcanic rocks from different tectonic settingsd There is close similarity in the patterns of the spidergrams of the KT analyses and the Santorini lava of the Aegean island arc. The major elements group the KT with continen ...
Igneous Rocks
... Igneous rocks are also formed when volcanoes erupt, casing the magma to rise above the earth's surface. When magma appears above the earth, it is called lava. Igneous rocks are formed as the lava cools above ground. ...
... Igneous rocks are also formed when volcanoes erupt, casing the magma to rise above the earth's surface. When magma appears above the earth, it is called lava. Igneous rocks are formed as the lava cools above ground. ...
Chapter 10: Section 1 Continental Drift
... • As the ocean floor moves away from the ridge, molten rock, or magma, rises to fill the crack. • Hess suggested that if the sea floor is moving, the continents might be moving. • He suggested this might be the mechanism that Wegener was searching for. ...
... • As the ocean floor moves away from the ridge, molten rock, or magma, rises to fill the crack. • Hess suggested that if the sea floor is moving, the continents might be moving. • He suggested this might be the mechanism that Wegener was searching for. ...
MSWord file
... and Oviraptor) (1). The Gobi Desert is known to contain extensive deposits of (aeolian) placer gold (1). Definition of placer gold as gold that has been eroded and transported form its original/primary source by water and/or wind (1). Some placer gold deposits in the Gobi Desert are known to be of t ...
... and Oviraptor) (1). The Gobi Desert is known to contain extensive deposits of (aeolian) placer gold (1). Definition of placer gold as gold that has been eroded and transported form its original/primary source by water and/or wind (1). Some placer gold deposits in the Gobi Desert are known to be of t ...
Earth Sciences 089G MIDTERM EXAMINATION MARKING KEY Part
... and Oviraptor) (1). The Gobi Desert is known to contain extensive deposits of (aeolian) placer gold (1). Definition of placer gold as gold that has been eroded and transported form its original/primary source by water and/or wind (1). Some placer gold deposits in the Gobi Desert are known to be of t ...
... and Oviraptor) (1). The Gobi Desert is known to contain extensive deposits of (aeolian) placer gold (1). Definition of placer gold as gold that has been eroded and transported form its original/primary source by water and/or wind (1). Some placer gold deposits in the Gobi Desert are known to be of t ...
Fault rocks of the Jelešňa fault zone (Central Carpathian Paleogene
... Field observations point that the Jelešňa fault zone does not seem to have affected the Neogene deposits of the Orava–Nowy Targ Basin that discordantly overlies the Paleogene rocks in the northern part of the study area. Along the northern prolongation of the Jelešňa zone, the offset segments of the ...
... Field observations point that the Jelešňa fault zone does not seem to have affected the Neogene deposits of the Orava–Nowy Targ Basin that discordantly overlies the Paleogene rocks in the northern part of the study area. Along the northern prolongation of the Jelešňa zone, the offset segments of the ...
The Diversity of Ocean Life
... Intertidal Zone – the area where the land and ocean meet and overlap The intertidal zone is a narrow strip of land which is alternately covered and uncovered between high and low tides Neritic Zone – covers the gently sloping continental slope The neritic zone is often shallow enough to put all of i ...
... Intertidal Zone – the area where the land and ocean meet and overlap The intertidal zone is a narrow strip of land which is alternately covered and uncovered between high and low tides Neritic Zone – covers the gently sloping continental slope The neritic zone is often shallow enough to put all of i ...
PLATE TECTONICS
... upper mantle that form plates are called the lithosphere • They rest on the upper mantle called the asthenosphere • Earth has two kinds of crust: continental crust and oceanic crust – Continents are made of continental crust, which is made up of rocks that are less dense than oceanic crust – The oce ...
... upper mantle that form plates are called the lithosphere • They rest on the upper mantle called the asthenosphere • Earth has two kinds of crust: continental crust and oceanic crust – Continents are made of continental crust, which is made up of rocks that are less dense than oceanic crust – The oce ...
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.