Proterozoic geology of the Wet Mountains, Colorado
... oldest pluton is subalkalic and barely calc-alkaline. Younger ones are more potassic and Fe-rich. ...
... oldest pluton is subalkalic and barely calc-alkaline. Younger ones are more potassic and Fe-rich. ...
Homework Set 1
... How are the depths of earthquakes generally controlled by the extent of this zone (i.e., what is the typical depth range of the majority of earthquakes)? ...
... How are the depths of earthquakes generally controlled by the extent of this zone (i.e., what is the typical depth range of the majority of earthquakes)? ...
tectonics, volcanism and seismicity: issues of paragenetic relation
... end of Upper Quaternary period (Q3). This VTD takes the form of the Karymskaya Circular Structure (KCS) in 36x28 km with displacement amplitudes along circular fractures from 40 to 100+ meters. The KCS has a series of particular tectonic features. It is a telescoping structure that manifests the seq ...
... end of Upper Quaternary period (Q3). This VTD takes the form of the Karymskaya Circular Structure (KCS) in 36x28 km with displacement amplitudes along circular fractures from 40 to 100+ meters. The KCS has a series of particular tectonic features. It is a telescoping structure that manifests the seq ...
Tectonic Plate Boundaries
... can cause incredible destruction, like the Asian Tsunami, which killed more than 200,000 people in 11 countries across the Indian Ocean region in December ...
... can cause incredible destruction, like the Asian Tsunami, which killed more than 200,000 people in 11 countries across the Indian Ocean region in December ...
Abstract
... represent mafic volcanic flows. The analytic signal transformation highlights magnetic anomalies within this unit, which are thought to represent synvolcanic mafic plutons. Large felsic intrusions occur throughout the Penokean volcanic belt, many of which are outcropping. Previous age dating of thes ...
... represent mafic volcanic flows. The analytic signal transformation highlights magnetic anomalies within this unit, which are thought to represent synvolcanic mafic plutons. Large felsic intrusions occur throughout the Penokean volcanic belt, many of which are outcropping. Previous age dating of thes ...
A. Direction of Forces and the Movements B. Effects of Diastrophism
... A break or rift was found at the middle of the ridge running along its length where basaltic magma wells out to the surface. This solidified and form a „new crust‟. This new crust pushes the old crust causing the ocean floor to spread. The ocean floor has been estimated to be spreading at the rate o ...
... A break or rift was found at the middle of the ridge running along its length where basaltic magma wells out to the surface. This solidified and form a „new crust‟. This new crust pushes the old crust causing the ocean floor to spread. The ocean floor has been estimated to be spreading at the rate o ...
Kaikoura tectonic
... • Limestone rocks consist of the shells of billions of micro-organisms, compressed on the ocean floor between 70 & 22 million years ago. • Water was gradually squeezed out of the accumulating sediments which turned from mud to rock. • About 15 million years ago the limestone was buckled and twisted ...
... • Limestone rocks consist of the shells of billions of micro-organisms, compressed on the ocean floor between 70 & 22 million years ago. • Water was gradually squeezed out of the accumulating sediments which turned from mud to rock. • About 15 million years ago the limestone was buckled and twisted ...
Virtual Lab Igneous Rock ID
... mafic, intermediate, or felsic are your options 3. What is the texture of the sample? Aphanitic, phaneritic, vesicular, glassy, porphyritic, and pegmatitic are your options 4. What are the major minerals present in the rock? Refer to page 111 in your textbook. a. Mafic: plagioclase, pyroxene, olivin ...
... mafic, intermediate, or felsic are your options 3. What is the texture of the sample? Aphanitic, phaneritic, vesicular, glassy, porphyritic, and pegmatitic are your options 4. What are the major minerals present in the rock? Refer to page 111 in your textbook. a. Mafic: plagioclase, pyroxene, olivin ...
Rocks
... 1. How does an igneous rock change into a sedimentary rock? 2. How does a sedimentary rock change into a metamorphic rock? 3. How does a metamorphic rock change into an igneous rock? 4. What is an index mineral? 5. How are metamorphic rocks classified? ...
... 1. How does an igneous rock change into a sedimentary rock? 2. How does a sedimentary rock change into a metamorphic rock? 3. How does a metamorphic rock change into an igneous rock? 4. What is an index mineral? 5. How are metamorphic rocks classified? ...
Geology - Fetlar
... compressed and heated to form metamorphic rocks including silica-rich quartz gneisses, micarich phyllite, and, where the mud had contained calcium-carbonate, crystalline limestone. A group of these rocks, from ancient ‘North America’, is known as the Dalradian Supergroup and makes up the west of Fet ...
... compressed and heated to form metamorphic rocks including silica-rich quartz gneisses, micarich phyllite, and, where the mud had contained calcium-carbonate, crystalline limestone. A group of these rocks, from ancient ‘North America’, is known as the Dalradian Supergroup and makes up the west of Fet ...
Plate Boundaries
... Once all the oceanic crust has been subducted the continental crusts collide Both crustal plates have the same density and they crumble into each other and move up creating the tallest mountains (neither is subducted). Earthquakes – due to friction btn the continents ***Not as deep as those on subdu ...
... Once all the oceanic crust has been subducted the continental crusts collide Both crustal plates have the same density and they crumble into each other and move up creating the tallest mountains (neither is subducted). Earthquakes – due to friction btn the continents ***Not as deep as those on subdu ...
Continental drift script (version 2) File
... bigger section of India moved upwards towards the Eurasian tectonic plate. As per the continental drift theory, the Indian tectonic plate collided with the Eurasian tectonic plate approximately 10 million years ago. The impact of this collision, uplifted the metamorphic and sedimentary rocks of both ...
... bigger section of India moved upwards towards the Eurasian tectonic plate. As per the continental drift theory, the Indian tectonic plate collided with the Eurasian tectonic plate approximately 10 million years ago. The impact of this collision, uplifted the metamorphic and sedimentary rocks of both ...
Lecture#5: Rocks
... rock) to different temperature and pressure conditions than those in which the original rock was formed ...
... rock) to different temperature and pressure conditions than those in which the original rock was formed ...
PT Magic Squares - Welcome to Rossignols.net
... Directions: Above is a group of terms related to Plate Tectonics. Your task is to match the definitions below with the correct term. Place the number of the definition in the box with the term. Check your answers by adding the numbers to see if the sums of each column and each row add up to the same ...
... Directions: Above is a group of terms related to Plate Tectonics. Your task is to match the definitions below with the correct term. Place the number of the definition in the box with the term. Check your answers by adding the numbers to see if the sums of each column and each row add up to the same ...
Plate Tectonics
... Major features of transform boundaries include strike-slip faults. A fault is a break or crack in Earth’s crust along which movement has occurred. Most active faults are located at or near plate boundaries. Earthquakes result when movement occurs along a fault. When rocks are compressed horizontally ...
... Major features of transform boundaries include strike-slip faults. A fault is a break or crack in Earth’s crust along which movement has occurred. Most active faults are located at or near plate boundaries. Earthquakes result when movement occurs along a fault. When rocks are compressed horizontally ...
Evaluating Evidence of Plate Tectonics
... • You need to be able to evaluate the reliability, strengths, weaknesses of the given evidence along with its ability to support logical and reasonable arguments about the motion of crustal plates. ...
... • You need to be able to evaluate the reliability, strengths, weaknesses of the given evidence along with its ability to support logical and reasonable arguments about the motion of crustal plates. ...
Plate Tectonics
... Paleomagnetism = As magma cools, the iron rich minerals align themselves with the Earth’s magnetic field and point north. However, some rocks have magnetic orientations that point south. ...
... Paleomagnetism = As magma cools, the iron rich minerals align themselves with the Earth’s magnetic field and point north. However, some rocks have magnetic orientations that point south. ...
Folding and Faulting| sample answer
... In other places the sandstone actually protected the limestone and in the Blackwater Valley you can see mounds of limestone synclines. Faulting. A landform created by faulting is a rift valley/ graben. eg East African Rift valley. Rift valleys occur due to tensional pressure. When 2 plates start to ...
... In other places the sandstone actually protected the limestone and in the Blackwater Valley you can see mounds of limestone synclines. Faulting. A landform created by faulting is a rift valley/ graben. eg East African Rift valley. Rift valleys occur due to tensional pressure. When 2 plates start to ...
Plate Tectonics
... oceanic crust, the less dense continental crust cannot sink under the denser oceanic crust. Instead, the denser oceanic crust begins to sink and plunges underneath the continental plate, back into the asthenosphere where it is recycled. This area is called a subduction zone. An example of this is th ...
... oceanic crust, the less dense continental crust cannot sink under the denser oceanic crust. Instead, the denser oceanic crust begins to sink and plunges underneath the continental plate, back into the asthenosphere where it is recycled. This area is called a subduction zone. An example of this is th ...
Chapter 9
... • The present style of plate tectonics – involving opening and then closing ocean basins – had almost certainly been established by the Early Proterozoic ...
... • The present style of plate tectonics – involving opening and then closing ocean basins – had almost certainly been established by the Early Proterozoic ...
Alaska
... ocean-continent subduction zone. As sediment is scraped off the top of the subducting oceanic plate, an accretionary wedge builds on the continental plate margin. An oceanic plateau with thick and therefore buoyant crust is traveling on the oceanic plate. When the plateau reaches the trench, it cann ...
... ocean-continent subduction zone. As sediment is scraped off the top of the subducting oceanic plate, an accretionary wedge builds on the continental plate margin. An oceanic plateau with thick and therefore buoyant crust is traveling on the oceanic plate. When the plateau reaches the trench, it cann ...
Handout 10
... c. boundary between tectonic plates that are moving away from each other _____ 14. mid-ocean ridge d. undersea mountain range _____ 15. subduction zone e. the boundary between tectonic plates that are colliding 16. A narrow area that forms where the plates at a divergent boundary separate is called ...
... c. boundary between tectonic plates that are moving away from each other _____ 14. mid-ocean ridge d. undersea mountain range _____ 15. subduction zone e. the boundary between tectonic plates that are colliding 16. A narrow area that forms where the plates at a divergent boundary separate is called ...
Name________________________________________
... c. boundary between tectonic plates that are moving away from each other _____ 14. mid-ocean ridge d. undersea mountain range _____ 15. subduction zone e. the boundary between tectonic plates that are colliding 16. A narrow area that forms where the plates at a divergent boundary separate is called ...
... c. boundary between tectonic plates that are moving away from each other _____ 14. mid-ocean ridge d. undersea mountain range _____ 15. subduction zone e. the boundary between tectonic plates that are colliding 16. A narrow area that forms where the plates at a divergent boundary separate is called ...
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.