Plate Tectonics
... Transform Fault Boundaries At a transform fault boundary, plates grind past each other without creating or destroying the lithosphere. SHALLOW EARTHQUAKES Transform faults • Most join two segments of a mid-ocean ridge. • At the time of formation, they roughly parallel the direction of plate mo ...
... Transform Fault Boundaries At a transform fault boundary, plates grind past each other without creating or destroying the lithosphere. SHALLOW EARTHQUAKES Transform faults • Most join two segments of a mid-ocean ridge. • At the time of formation, they roughly parallel the direction of plate mo ...
Thermocronology Age Determinations, Using Apatites and Zircons
... represented along the western coast of the Antarctic Peninsula by Triassic to Tertiary intrusive and volcanic rocks (Pankhurst, 1983) that intruded into or overlaid a turbiditic complex (Trinity Peninsula Group –TPG–) and correlative units (Smellie, 1991). As the ocean floor is subdivided by NNW tre ...
... represented along the western coast of the Antarctic Peninsula by Triassic to Tertiary intrusive and volcanic rocks (Pankhurst, 1983) that intruded into or overlaid a turbiditic complex (Trinity Peninsula Group –TPG–) and correlative units (Smellie, 1991). As the ocean floor is subdivided by NNW tre ...
Lab handout - Earth and Atmospheric Sciences
... The texture of an igneous rock depends on the rate of cooling. Slow cooling produces large crystals and a coarse texture, while quick cooling produces small crystals and a fine texture. Igneous rocks erupted from volcanoes cool quickly on the surface of the Earth, while others cool slowly in the Ear ...
... The texture of an igneous rock depends on the rate of cooling. Slow cooling produces large crystals and a coarse texture, while quick cooling produces small crystals and a fine texture. Igneous rocks erupted from volcanoes cool quickly on the surface of the Earth, while others cool slowly in the Ear ...
Reading
... The area where two plates come together is called a convergent boundary. This movement of plates causes a collision. Collisions can occur between oceanic crust and oceanic crust, oceanic crust and continental crust, or continental crust and continental crust. Collisions between two oceanic plates re ...
... The area where two plates come together is called a convergent boundary. This movement of plates causes a collision. Collisions can occur between oceanic crust and oceanic crust, oceanic crust and continental crust, or continental crust and continental crust. Collisions between two oceanic plates re ...
Plate Tectonics
... This newly formed crust is continually being replaced by new molten rock. Older crust diverges and is forced to move away from the area where new molten rock will form into new crust. ...
... This newly formed crust is continually being replaced by new molten rock. Older crust diverges and is forced to move away from the area where new molten rock will form into new crust. ...
Spherulitic Aphyric Pillow-Lobe Metatholeiitic Dacite Lava of the
... fine-grained massive flow that is 12 to 35 m thick and is locally underlain and overlain by carbonaceous interflow sediments. At the Dome mine, the unit is termed the Andesite flow. Overlying this is the V10b unit (at McIntyre) described as a 20- to 40-m-thick unit with a distinctive chicken-feed te ...
... fine-grained massive flow that is 12 to 35 m thick and is locally underlain and overlain by carbonaceous interflow sediments. At the Dome mine, the unit is termed the Andesite flow. Overlying this is the V10b unit (at McIntyre) described as a 20- to 40-m-thick unit with a distinctive chicken-feed te ...
Genesis of diamonds-the metamorphic point of view
... having resulted from the erosion of bedrock or "primary" sources 3.1. Placer in cratonic areas The oldest parts of continents are called cratons, and can be divided into two terranes: Archean-age archons, which are older than 2,500 million years, and Proterozoic-age protons, which are 1,600 -- 2,500 ...
... having resulted from the erosion of bedrock or "primary" sources 3.1. Placer in cratonic areas The oldest parts of continents are called cratons, and can be divided into two terranes: Archean-age archons, which are older than 2,500 million years, and Proterozoic-age protons, which are 1,600 -- 2,500 ...
File
... IN THE SPACE BELOW, SKETCH A DIVERGENT BOUNDARY BETWEEN TWO OCEANIC TECTONIC PLATES. INCLUDE THE FOLLOWING TERMS AND YOUR SKETCH: Oceanic crust, seafloor spreading, mid Atlantic ridge, magma ***Use arrows to indicate direction of tectonic plates! ...
... IN THE SPACE BELOW, SKETCH A DIVERGENT BOUNDARY BETWEEN TWO OCEANIC TECTONIC PLATES. INCLUDE THE FOLLOWING TERMS AND YOUR SKETCH: Oceanic crust, seafloor spreading, mid Atlantic ridge, magma ***Use arrows to indicate direction of tectonic plates! ...
field project
... The Bay Area is a region of California that belongs to two different tectonic plates, the North American Plate and the Pacific Plate. The boundary separating the regions is the San Andreas fault, a transform fault formed ~30 million years ago. The transform boundary that exists today was once a conv ...
... The Bay Area is a region of California that belongs to two different tectonic plates, the North American Plate and the Pacific Plate. The boundary separating the regions is the San Andreas fault, a transform fault formed ~30 million years ago. The transform boundary that exists today was once a conv ...
Origin of the Earth`s Crust and its Evolution
... IV. The Late fiysch stage, perhaps the Late Cretaceous to the Early Tertiary. The greatly sunken geosynclinal deposits became highly mobilized and finally granitized into either migmatitic or gneissic rocks by rapid upheaving of geothermal level accompanied by supply of volatile substance. Further, ...
... IV. The Late fiysch stage, perhaps the Late Cretaceous to the Early Tertiary. The greatly sunken geosynclinal deposits became highly mobilized and finally granitized into either migmatitic or gneissic rocks by rapid upheaving of geothermal level accompanied by supply of volatile substance. Further, ...
Coastal Zones - hrsbstaff.ednet.ns.ca
... – The infralittoral zone • extends to five metres below the low water mark • the algal dominated zone – The circalittoral zone • the region beyond the infralittoral • dominated by sessile animals such as oysters. ...
... – The infralittoral zone • extends to five metres below the low water mark • the algal dominated zone – The circalittoral zone • the region beyond the infralittoral • dominated by sessile animals such as oysters. ...
Odds grow of major quake in bay region by 2043 By David Perlman
... Only a year ago, the working group estimated that the probability of one or more large quakes striking on any of the Bay Area faults was 63 percent. The new probability calculations put it at 72 percent. Quake probabilities have risen more sharply for Bay Area faults largely because scientists have ...
... Only a year ago, the working group estimated that the probability of one or more large quakes striking on any of the Bay Area faults was 63 percent. The new probability calculations put it at 72 percent. Quake probabilities have risen more sharply for Bay Area faults largely because scientists have ...
Weathering Overview
... change its composition. Chemical weathering dissolves some rock and also causes some new minerals, such as iron oxides and clays, to form. ...
... change its composition. Chemical weathering dissolves some rock and also causes some new minerals, such as iron oxides and clays, to form. ...
File - RBSS Outdoors
... 1. From the text- Geography 12Describe the formation of this type of rock. Use Concept Definition Handout 2. Describe the sub-categories 3. Give at least 3 or 4 examples of these types of rocks and possible human uses.. Eg. Granite is an igneous rock used for countertops.. 4. Describe how your rock ...
... 1. From the text- Geography 12Describe the formation of this type of rock. Use Concept Definition Handout 2. Describe the sub-categories 3. Give at least 3 or 4 examples of these types of rocks and possible human uses.. Eg. Granite is an igneous rock used for countertops.. 4. Describe how your rock ...
Adirondacks - Old Rocks, New Mountains
... Colden, Avalanche Pass, Algonquin, Indian Pass, Wallface. Passes are valleys formed along faults. ...
... Colden, Avalanche Pass, Algonquin, Indian Pass, Wallface. Passes are valleys formed along faults. ...
Platemovementrecapquiz 5.08MB 2017-03-29 12
... Geological evidence • The Appalachian Mountains of eastern North America are thought to link to the Caledonides of Ireland, Britain, Greenland, and Scandinavia and the Anti-Atlas Range in ...
... Geological evidence • The Appalachian Mountains of eastern North America are thought to link to the Caledonides of Ireland, Britain, Greenland, and Scandinavia and the Anti-Atlas Range in ...
2. Fidalgo
... very well. Where they are preserved, they typically exist as regional-scale features, spread over large expanses of the landscape. They don’t lend themselves well to casual observations on an afternoon field trip. One very convenient exception to this rule, and a very scenic one at that, is found on ...
... very well. Where they are preserved, they typically exist as regional-scale features, spread over large expanses of the landscape. They don’t lend themselves well to casual observations on an afternoon field trip. One very convenient exception to this rule, and a very scenic one at that, is found on ...
PNW Tectonic Block Model
... of coastal blocks with respect to stable North America (yellow arrows). The southern Cascade volcanic arc (red triangles) erupts along the trailing edge of Oregon block in a region of crustal extension. Orange areas, representing young volcanic rocks erupted in the last 2 million years, are more vol ...
... of coastal blocks with respect to stable North America (yellow arrows). The southern Cascade volcanic arc (red triangles) erupts along the trailing edge of Oregon block in a region of crustal extension. Orange areas, representing young volcanic rocks erupted in the last 2 million years, are more vol ...
Blakeley Jones GEOL 1104 Review 6 – Earth`s Interior and Plate
... 1) T or F: The oldest rocks on the seafloor are much younger than the oldest rocks on the continents. 2) T or F: Earth's radius and surface area are slowly increasing to accommodate the new oceanic crust being formed at mid-oceanic ridges. 4) T or F: The oldest rocks of the oceanic crust are found i ...
... 1) T or F: The oldest rocks on the seafloor are much younger than the oldest rocks on the continents. 2) T or F: Earth's radius and surface area are slowly increasing to accommodate the new oceanic crust being formed at mid-oceanic ridges. 4) T or F: The oldest rocks of the oceanic crust are found i ...
Anorthosites Anorthosites Types of Anorthosites
... e. Plagioclase plutons coalesce to form massif anorthosite, whereas granitoid crustal melts rise to shallow levels as well. Mafic cumulates remain at depth or detach and sink into the mantle. Figure 20-2. Model for the generation of Massif -type anorthosites. From Ashwall (1993) Anorthosites. Spring ...
... e. Plagioclase plutons coalesce to form massif anorthosite, whereas granitoid crustal melts rise to shallow levels as well. Mafic cumulates remain at depth or detach and sink into the mantle. Figure 20-2. Model for the generation of Massif -type anorthosites. From Ashwall (1993) Anorthosites. Spring ...
QUS 112 Intro Engineering Geology - Unesco
... 9. At this point, the solar system is composed only of solid, protoplanetary bodies and gas giants. The "planetesimals" would slowly collide with each other and become more massive. 10. Eventually, after ten to a hundred million years, you end up with ten or so planets, in stable orbits, and that's ...
... 9. At this point, the solar system is composed only of solid, protoplanetary bodies and gas giants. The "planetesimals" would slowly collide with each other and become more massive. 10. Eventually, after ten to a hundred million years, you end up with ten or so planets, in stable orbits, and that's ...
Environmental Science
... Mohorovičić Discontinuity - The Moho The Moho: Image of Earth's internal structure by USGS - Mohorovicic Discontinuity (red line) added by Geology.com. What is the Mohorovičić Discontinuity? The Mohorovicic Discontinuity, or "Moho," is the boundary between the crust and the mantle. The red line in t ...
... Mohorovičić Discontinuity - The Moho The Moho: Image of Earth's internal structure by USGS - Mohorovicic Discontinuity (red line) added by Geology.com. What is the Mohorovičić Discontinuity? The Mohorovicic Discontinuity, or "Moho," is the boundary between the crust and the mantle. The red line in t ...
orogenesis and ore deposits
... to the beginning of the Precambrian. Each mountain system in succession has been worn down to a low general level by erosion processes,the debris being in part laid over the roots of older systems, forming a superficial blanket of sediments in interior parts of continents. In part it was carried int ...
... to the beginning of the Precambrian. Each mountain system in succession has been worn down to a low general level by erosion processes,the debris being in part laid over the roots of older systems, forming a superficial blanket of sediments in interior parts of continents. In part it was carried int ...
Igneous Petrology
... rock is melted and turned to a liquid form which is called magma. magmas are generated by partial melting in the upper mantle or lower crust, such a process occurs over a range of depths. Therefore rising of magma connected to the weakness area (plate margins) within the Earth. ...
... rock is melted and turned to a liquid form which is called magma. magmas are generated by partial melting in the upper mantle or lower crust, such a process occurs over a range of depths. Therefore rising of magma connected to the weakness area (plate margins) within the Earth. ...
Conduits Into Earth’s Inaccessible Interior
... scale of the entire mantle, these plumes are narrow (with a width-to-height ratio similar to a 6-inch strand of spaghetti). But these plumes can be vast—plume “heads” can reach an estimated 500 to 1,000 kilometers (310 to 620 miles) in diameter. Plumes start at the bottom of the earth’s mantle and c ...
... scale of the entire mantle, these plumes are narrow (with a width-to-height ratio similar to a 6-inch strand of spaghetti). But these plumes can be vast—plume “heads” can reach an estimated 500 to 1,000 kilometers (310 to 620 miles) in diameter. Plumes start at the bottom of the earth’s mantle and c ...
Algoman orogeny
The Algoman orogeny, known as the Kenoran orogeny in Canada, was an episode of mountain-building (orogeny) during the Late Archean Eon that involved repeated episodes of continental collisions, compressions and subductions. The Superior province and the Minnesota River Valley terrane collided about 2,700 to 2,500 million years ago. The collision folded the Earth's crust and produced enough heat and pressure to metamorphose the rock. Blocks were added to the Superior province along a 1,200 km (750 mi) boundary that stretches from present-day eastern South Dakota into the Lake Huron area. The Algoman orogeny brought the Archaen Eon to a close, about 2,500 million years ago; it lasted less than 100 million years and marks a major change in the development of the earth’s crust.The Canadian shield contains belts of metavolcanic and metasedimentary rocks formed by the action of metamorphism on volcanic and sedimentary rock. The areas between individual belts consist of granites or granitic gneisses that form fault zones. These two types of belts can be seen in the Wabigoon, Quetico and Wawa subprovinces; the Wabigoon and Wawa are of volcanic origin and the Quetico is of sedimentary origin. These three subprovinces lie linearly in southwestern- to northeastern-oriented belts about 140 km (90 mi) wide on the southern portion of the Superior Province.The Slave province and portions of the Nain province were also affected. Between about 2,000 and 1,700 million years ago these combined with the Sask and Wyoming cratons to form the first supercontinent, the Kenorland supercontinent.