Metamorphic Facies
... IMPORTANT: Although rocks undergo metamorphism over increasing (or prograde) as well as decreasing (retrograde during exhumation process) set of P-T conditions, the assignment of a rock to a facies is always based on the peak metamorphic conditions it reached. The retrograde conditions are generall ...
... IMPORTANT: Although rocks undergo metamorphism over increasing (or prograde) as well as decreasing (retrograde during exhumation process) set of P-T conditions, the assignment of a rock to a facies is always based on the peak metamorphic conditions it reached. The retrograde conditions are generall ...
The mechanics of tectonics
... Several series of waves emanate from the focus of an earthquake. They have different speeds and produce different effects as they travel through the lithosphere. The fastest are the body waves, divided into two categories: primary or P waves and secondary or S waves. P waves are longitudinal and cor ...
... Several series of waves emanate from the focus of an earthquake. They have different speeds and produce different effects as they travel through the lithosphere. The fastest are the body waves, divided into two categories: primary or P waves and secondary or S waves. P waves are longitudinal and cor ...
Composition and Evolution of the Lithosphere
... tonalites, granodiorites, granites, and layered intrusive gabbros Greenstones: basaltic, andesitic, and rhyolitic volcanic rocks with metamorphosed sediments and basaltic pillow lavas (sequential transition) ...
... tonalites, granodiorites, granites, and layered intrusive gabbros Greenstones: basaltic, andesitic, and rhyolitic volcanic rocks with metamorphosed sediments and basaltic pillow lavas (sequential transition) ...
Name Aims 27 - 35 Review Questions Version 1 Page 1
... C) comparisons between Moon rocks and Earth rocks D) well drillings from Earth’s mantle and core ...
... C) comparisons between Moon rocks and Earth rocks D) well drillings from Earth’s mantle and core ...
Earth Dynamics
... mountains. As tension pulls crust apart, faults form. At the faults, some blocks of crust fall and others rise. Fault-block mountains are parallel ridges that form where blocks of crust move up or down along faults. A fault-block mountain might appear as a high, craggy ridge next to a valley. Somewh ...
... mountains. As tension pulls crust apart, faults form. At the faults, some blocks of crust fall and others rise. Fault-block mountains are parallel ridges that form where blocks of crust move up or down along faults. A fault-block mountain might appear as a high, craggy ridge next to a valley. Somewh ...
tectonic models for the geological evolution of crust, cratons and
... Abstract The earliest sialic crust was probably destroyed by meteorite impacts, leaving only detrital 4.2-3.9 Ga zircons in later sediments. The oldest rocks are 3.9-3.8 Ga high-grade gneisses commonly associated with lavas and sediments which were transported into the deep crust. They indicate that ...
... Abstract The earliest sialic crust was probably destroyed by meteorite impacts, leaving only detrital 4.2-3.9 Ga zircons in later sediments. The oldest rocks are 3.9-3.8 Ga high-grade gneisses commonly associated with lavas and sediments which were transported into the deep crust. They indicate that ...
precambrian rocks of the taos range and vicinity, northern new mexico
... felsic metavolcanic and metasedimentary successions. Individual units range from 10 cm to many meters in thickness. Thick sequences composed dominantly of amphibolites occur in the Long Canyon area north of Taos Ski Valley and on the south side of Red River east of Columbine Creek (fig. 1). The form ...
... felsic metavolcanic and metasedimentary successions. Individual units range from 10 cm to many meters in thickness. Thick sequences composed dominantly of amphibolites occur in the Long Canyon area north of Taos Ski Valley and on the south side of Red River east of Columbine Creek (fig. 1). The form ...
The Lake Highway
... Over considerable time these deposits were buried beneath more layers of silt and sand and as the continents moved they were subjected to great pressures and temperatures. This produced quartzite and schist which are the oldest rocks in Tasmania. The harder quartzite takes longer to erode and so for ...
... Over considerable time these deposits were buried beneath more layers of silt and sand and as the continents moved they were subjected to great pressures and temperatures. This produced quartzite and schist which are the oldest rocks in Tasmania. The harder quartzite takes longer to erode and so for ...
PETROLOGICAL COMPARISON BETWEEN THE SUNLIGHT AND
... The Absaroka Volcanic Province (AVP) of northwestern Wyoming is composed of intermediate and mafic rocks. Most of the volcanism occurred between 53 and 38 million years ago (Sundell, 1993). It is the largest Eocene volcanic field in the Northern Rocky Mountains covering nearly 9,000 square miles. Th ...
... The Absaroka Volcanic Province (AVP) of northwestern Wyoming is composed of intermediate and mafic rocks. Most of the volcanism occurred between 53 and 38 million years ago (Sundell, 1993). It is the largest Eocene volcanic field in the Northern Rocky Mountains covering nearly 9,000 square miles. Th ...
UR/Cf8()._ (0
... Along the eastern side of the Dundas Trough is a 10-15 km wide elongate zone of acid volcanic rock, the Mt Read Volcanics. This acid volcanic pile is considered to have been the result of crustal melting due to high heat flow associated with the upwelled mantle. The earliest record of acid volcanic ...
... Along the eastern side of the Dundas Trough is a 10-15 km wide elongate zone of acid volcanic rock, the Mt Read Volcanics. This acid volcanic pile is considered to have been the result of crustal melting due to high heat flow associated with the upwelled mantle. The earliest record of acid volcanic ...
Document
... FLOW) - OF THE MAGMA: LOW VISCOSITY FLUIDS FLOW MORE EASILY THAN HIGH VISCOSITY FLUIDS ...
... FLOW) - OF THE MAGMA: LOW VISCOSITY FLUIDS FLOW MORE EASILY THAN HIGH VISCOSITY FLUIDS ...
File - South Sevier High School
... that Earth’s plates move is called ________________ _________________________. 2. ___________________ geologic activity is concentrated at plate boundaries, where plates move away, toward, or past each other. 3. In the early 1900’s, Alfred _____________________ hypothesized that Earth’s crustal plat ...
... that Earth’s plates move is called ________________ _________________________. 2. ___________________ geologic activity is concentrated at plate boundaries, where plates move away, toward, or past each other. 3. In the early 1900’s, Alfred _____________________ hypothesized that Earth’s crustal plat ...
Unit 7 Plate Tectonics: Key Concept Notes
... 2. Land Features and fossils: if the continents were placed together then land features such as mountains of the same age and composition line up. Fossils of various species of plants and animals also line up when the continents are pieced together 3. Climatic Evidence: Evidence of glacier activity ...
... 2. Land Features and fossils: if the continents were placed together then land features such as mountains of the same age and composition line up. Fossils of various species of plants and animals also line up when the continents are pieced together 3. Climatic Evidence: Evidence of glacier activity ...
Metamorphic Textures
... alignment of sheet silicate minerals and/or compositional and mineralogical layering in the rock. Most foliation is caused by the preferred orientation of phylosilicates, like clay minerals, micas, and chlorite. Preferred orientation develops as a result of nonhydrostatic or differential stress acti ...
... alignment of sheet silicate minerals and/or compositional and mineralogical layering in the rock. Most foliation is caused by the preferred orientation of phylosilicates, like clay minerals, micas, and chlorite. Preferred orientation develops as a result of nonhydrostatic or differential stress acti ...
GEOL_2_mid_term_I_ke..
... (32) 1 pt. Linear, magnetic patterns associated with mid-ocean ridges are configured as ________. A) reversed magnetizations along the rift valleys and normal magnetizations along the ridge B) normal and reversed magnetized strips roughly parallel to the ridge C) normal and reversed magnetized strip ...
... (32) 1 pt. Linear, magnetic patterns associated with mid-ocean ridges are configured as ________. A) reversed magnetizations along the rift valleys and normal magnetizations along the ridge B) normal and reversed magnetized strips roughly parallel to the ridge C) normal and reversed magnetized strip ...
Variables Change Earth Study Guide
... Landforms caused by deposition Wind: Over time, sand dunes are formed by the deposition of sand. Water: As rivers enter larger bodies of water, they slow down, fan out, and the sediment they were carrying is dropped. Deltas are formed through this process. Water in rivers and streams may slow down o ...
... Landforms caused by deposition Wind: Over time, sand dunes are formed by the deposition of sand. Water: As rivers enter larger bodies of water, they slow down, fan out, and the sediment they were carrying is dropped. Deltas are formed through this process. Water in rivers and streams may slow down o ...
Slide 1
... does not? (5 min / 5 pts) Ocean-Ocean and Ocean-Continent boundaries both have oceanic crust as one of the plates ...
... does not? (5 min / 5 pts) Ocean-Ocean and Ocean-Continent boundaries both have oceanic crust as one of the plates ...
Topic 12 guided reading answer key
... 32. Is there a difference between plates, lithospheric plates, and tectonic plates? NO 33. Approximately how much do the lithospheric plates move each year? A FEW CENTIMETERS A YEAR p.230 34. Study figure 12-3. What do these diagrams show us about the positions of the continents? THE CONTINENTS HAVE ...
... 32. Is there a difference between plates, lithospheric plates, and tectonic plates? NO 33. Approximately how much do the lithospheric plates move each year? A FEW CENTIMETERS A YEAR p.230 34. Study figure 12-3. What do these diagrams show us about the positions of the continents? THE CONTINENTS HAVE ...
THE GEOLOGICAL MAP (1:25 000) OF THE SW PART OF
... succession of rock strata but also recognition of general features of the tectonic structure. Thefirst horizon crops out in the Slyngfjellet, Strypegga and Solheimfjellet massifs and consists of yellow-weathered dolostones, grey and black calcite marbles and subordinate carbonate schists. The second ...
... succession of rock strata but also recognition of general features of the tectonic structure. Thefirst horizon crops out in the Slyngfjellet, Strypegga and Solheimfjellet massifs and consists of yellow-weathered dolostones, grey and black calcite marbles and subordinate carbonate schists. The second ...
Rock Cycle Roundabout - California Academy of Sciences
... sedimentary rocks, or they can be subjected to heat and/or pressure causing them to melt and eventually erupt as igneous rocks. Alternatively, metamorphic rocks may be transformed again into different metamorphic rocks. The simplest way to understand the rock cycle is to follow one rock through vari ...
... sedimentary rocks, or they can be subjected to heat and/or pressure causing them to melt and eventually erupt as igneous rocks. Alternatively, metamorphic rocks may be transformed again into different metamorphic rocks. The simplest way to understand the rock cycle is to follow one rock through vari ...
In the last few years I`ve had the privilege of working with some
... Mapping and Ar/Ar dating of Coast Range volcanic rocks at Burdell Mountain with implications for long-term offset on the East Bay fault system (Rick Ford). ...
... Mapping and Ar/Ar dating of Coast Range volcanic rocks at Burdell Mountain with implications for long-term offset on the East Bay fault system (Rick Ford). ...
Mineral resources of igneous and metamorphic origin
... How Igneous Rocks Form There is no liquid layer of magma below the surface. Instead, rocks in some parts of the lower crust and/or upper mantle need to melt in order to make magma. Once magma forms, it will try to rise from higher-pressure regions (deeper in the crust) to lower pressure areas (near ...
... How Igneous Rocks Form There is no liquid layer of magma below the surface. Instead, rocks in some parts of the lower crust and/or upper mantle need to melt in order to make magma. Once magma forms, it will try to rise from higher-pressure regions (deeper in the crust) to lower pressure areas (near ...
Ma Shi Chau
... suggesting the presence of active tectonic and earthquake activities during the time of deposition. During the Jurassic period, about 160 million years before present, extensive volcanic eruptions occurred in the area. Large amount of rock fragments, volcanic debris and lava fragments cumulated arou ...
... suggesting the presence of active tectonic and earthquake activities during the time of deposition. During the Jurassic period, about 160 million years before present, extensive volcanic eruptions occurred in the area. Large amount of rock fragments, volcanic debris and lava fragments cumulated arou ...
Igneous Rocks and Plate Boundaries
... How Igneous Rocks Form There is no liquid layer of magma below the surface. Instead, rocks in some parts of the lower crust and/or upper mantle need to melt in order to make magma. Once magma forms, it will try to rise from higher-pressure regions (deeper in the crust) to lower pressure areas (near ...
... How Igneous Rocks Form There is no liquid layer of magma below the surface. Instead, rocks in some parts of the lower crust and/or upper mantle need to melt in order to make magma. Once magma forms, it will try to rise from higher-pressure regions (deeper in the crust) to lower pressure areas (near ...
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.