LARAMIDE OROGENY
... • To what extent was the subducting Farallon plate involved? • How does intracontinental deformation on the scale of the Laramide even occur? • How deep do Laramide reverse and thrust faults cut? Did they cut their own paths through the top of the basement, or did they follow pre-existing faults? • ...
... • To what extent was the subducting Farallon plate involved? • How does intracontinental deformation on the scale of the Laramide even occur? • How deep do Laramide reverse and thrust faults cut? Did they cut their own paths through the top of the basement, or did they follow pre-existing faults? • ...
Earthquakes
... downward and upward folds in rock An anticline is a fold in a rock that arcs upward A syncline is a fold in a rock that arcs downward These folds in rocks are found on many parts of the earths surface where compression forces have folded the crust ...
... downward and upward folds in rock An anticline is a fold in a rock that arcs upward A syncline is a fold in a rock that arcs downward These folds in rocks are found on many parts of the earths surface where compression forces have folded the crust ...
Benchmark#5 Volcanoes, Rocks types, weathering
... Which of the following types of plate boundaries caused the formation of the Cascades Volcanoes of Northern California and the Pacific Northwest, and the Andes Mts. of South America? A. B. C. ...
... Which of the following types of plate boundaries caused the formation of the Cascades Volcanoes of Northern California and the Pacific Northwest, and the Andes Mts. of South America? A. B. C. ...
Kinematic evolution of the Greater Himalayan Sequence
... rheological strength of the GHS later resulted in post-peak metamorphic reverse-sense shearing on the STDS. These interpretations highlight the importance of melt distribution and rheology as controls on crustal scale deformation during orogenesis. With increasing strain, the degree of alignment of ...
... rheological strength of the GHS later resulted in post-peak metamorphic reverse-sense shearing on the STDS. These interpretations highlight the importance of melt distribution and rheology as controls on crustal scale deformation during orogenesis. With increasing strain, the degree of alignment of ...
GLG101online_05A_IgneousProcesses_MCC_Leighty
... information. I believe you’ll have enough information to reference without having to purchase a costly textbook. These lecture notes are very similar to the ones I use in my traditional classes. You’ll find they are loaded with imagery and streamlined text that highlight the most essential terms and ...
... information. I believe you’ll have enough information to reference without having to purchase a costly textbook. These lecture notes are very similar to the ones I use in my traditional classes. You’ll find they are loaded with imagery and streamlined text that highlight the most essential terms and ...
1.6 General age and tectonic setting of the Arabian Shield
... The geologic history of the Arabian Shield covers a broad sweep of geologic time from distant beginnings more than 2,000 million years ago to present day processes that are sculpting and changing the rocks and landscape of the shield. The core of the history covers a 300-million-year period between ...
... The geologic history of the Arabian Shield covers a broad sweep of geologic time from distant beginnings more than 2,000 million years ago to present day processes that are sculpting and changing the rocks and landscape of the shield. The core of the history covers a 300-million-year period between ...
The Hadean-Archaean Environment
... The surface remained hot 1800 – 2000 K, partially molten with some solid scum. Tidal heating from the Moon prolonged the episode. In 20 million years, the surface and mantle of the Earth were solid rock and the heat flow waned to 0.5 W/m2, similar to 1 millionyear-old modern oceanic crust. Conside ...
... The surface remained hot 1800 – 2000 K, partially molten with some solid scum. Tidal heating from the Moon prolonged the episode. In 20 million years, the surface and mantle of the Earth were solid rock and the heat flow waned to 0.5 W/m2, similar to 1 millionyear-old modern oceanic crust. Conside ...
Material properties and microstructure from
... numericaly following [2]. The model domain is 600x140, 1 km grid. The initial conditions are steady-state with subduction of the Indian lithosphere beneath the Himalayas and Tibet at 3 cm/y. Temperature is 25°C at the surface and 1300°C at the bottom of the lithosphere. Radiogenic heat production (A ...
... numericaly following [2]. The model domain is 600x140, 1 km grid. The initial conditions are steady-state with subduction of the Indian lithosphere beneath the Himalayas and Tibet at 3 cm/y. Temperature is 25°C at the surface and 1300°C at the bottom of the lithosphere. Radiogenic heat production (A ...
ES Chapter 20
... • Island arc complexes are volcanic mountains that form as a result of the convergence of two oceanic plates. • Highly deformed mountains with deep roots may form as a result of the convergence of an oceanic plate and a continental plate. • Earth’s tallest mountains form along continental-continenta ...
... • Island arc complexes are volcanic mountains that form as a result of the convergence of two oceanic plates. • Highly deformed mountains with deep roots may form as a result of the convergence of an oceanic plate and a continental plate. • Earth’s tallest mountains form along continental-continenta ...
On the Move
... This is what is occurring where the North American Plate and the Eurasian Plate are diverging: The Mid-Atlantic Ridge and Krafla Volcano(in Iceland) were formed. ...
... This is what is occurring where the North American Plate and the Eurasian Plate are diverging: The Mid-Atlantic Ridge and Krafla Volcano(in Iceland) were formed. ...
Metamorphic reworking of a high - Lamont
... American and Caribbean plates in Guatemala. The Motagua fault, the central active strand of the suture zone, underwent two major collisional events within a system otherwise dominated by strike–slip motion. The first event is recorded by high-pressure/low temperature (HP/LT) eclogites and related roc ...
... American and Caribbean plates in Guatemala. The Motagua fault, the central active strand of the suture zone, underwent two major collisional events within a system otherwise dominated by strike–slip motion. The first event is recorded by high-pressure/low temperature (HP/LT) eclogites and related roc ...
Chapter 23 The Geology of the Mesozoic Era
... 39. The Gulf Coast of North America formed through a sequence of events in an almost identical fashion to that of the Atlantic margin, except that sediment thickness in the Gulf Coast was far ___________. 40. After the initial deposition of redbeds in the rift between North and South America, thick ...
... 39. The Gulf Coast of North America formed through a sequence of events in an almost identical fashion to that of the Atlantic margin, except that sediment thickness in the Gulf Coast was far ___________. 40. After the initial deposition of redbeds in the rift between North and South America, thick ...
Seismogenic zone input: the upper plate contribution in Costa Rica
... Subduction thrust systems are conveyor belts that transport surface sediments and rocks through an ever-increasing pressure-temperature-strain regime These are unique fault systems because the thrusts exhibit an evolutionary progression from zero displacement in unconsolidated sediments to many kilo ...
... Subduction thrust systems are conveyor belts that transport surface sediments and rocks through an ever-increasing pressure-temperature-strain regime These are unique fault systems because the thrusts exhibit an evolutionary progression from zero displacement in unconsolidated sediments to many kilo ...
Rusty Ridge JEA Drilling Report (PDF Format)
... The nature of the contact suggests a possible unconformity resulting from a hiatus in volcanic activity, due to the presence of strongly altered “regolith-like” material. Alternatively, one could argue for the contact to be an altered fault breccia at the contact interface. The mafic volcanic rocks ...
... The nature of the contact suggests a possible unconformity resulting from a hiatus in volcanic activity, due to the presence of strongly altered “regolith-like” material. Alternatively, one could argue for the contact to be an altered fault breccia at the contact interface. The mafic volcanic rocks ...
Geology of the Eagle Spring Area, Eagle Mountain, Hudspeth
... the southeast beyond Eagle Spring. These faults may he traced by the dikes. West of Eagle Spring the Eagle Ford and Washita strata have been faulted down against the Yucca, Bluff, and Cox formations on the north. The fault is an oblique one throughout most of its length. It is apparently a normal fa ...
... the southeast beyond Eagle Spring. These faults may he traced by the dikes. West of Eagle Spring the Eagle Ford and Washita strata have been faulted down against the Yucca, Bluff, and Cox formations on the north. The fault is an oblique one throughout most of its length. It is apparently a normal fa ...
37. Igneous and Metasedimentary Basement Lithofacies of the
... Queensland Plateau acoustic basement was penetrated by rotary drilling at Sites 824 and 825, to the west and east of Holmes Reef respectively, on the western Queensland Plateau. Despite poor recovery (5%—13%), the lithologies recovered are of considerable importance as they represent the only baseme ...
... Queensland Plateau acoustic basement was penetrated by rotary drilling at Sites 824 and 825, to the west and east of Holmes Reef respectively, on the western Queensland Plateau. Despite poor recovery (5%—13%), the lithologies recovered are of considerable importance as they represent the only baseme ...
2- Earth - Icivil-Hu
... (b) The specific gravity should usually be high, but this criterion depends upon the purpose for which the concrete is needed. (c) The material should be well graded, with a wide range of particle sizes (d) The fragments should have a rough surface, so that a good bond can be achieved between the ag ...
... (b) The specific gravity should usually be high, but this criterion depends upon the purpose for which the concrete is needed. (c) The material should be well graded, with a wide range of particle sizes (d) The fragments should have a rough surface, so that a good bond can be achieved between the ag ...
HISTORICAL_GEOLOGY_fossils
... are missing and time is therefore not recorded. • the most obvious type of unconformity is an angular unconformity, where rocks beneath the surface are more strongly deformed and those above the surface are less strongly deformed. • unconformities often represent an interval of mountain building, wh ...
... are missing and time is therefore not recorded. • the most obvious type of unconformity is an angular unconformity, where rocks beneath the surface are more strongly deformed and those above the surface are less strongly deformed. • unconformities often represent an interval of mountain building, wh ...
The geology of an area of approximately 500 km2, which covers
... composition, are locally interlayered with the mafic volcanic rocks but are increasingly more abundant towards the 'top' of the volcanic succession. They are also interlayered with felsic metavolcanics and volcanogenic sediments in the area between Hayes Lake and J ojay Lake. Massive feldspar-phyric ...
... composition, are locally interlayered with the mafic volcanic rocks but are increasingly more abundant towards the 'top' of the volcanic succession. They are also interlayered with felsic metavolcanics and volcanogenic sediments in the area between Hayes Lake and J ojay Lake. Massive feldspar-phyric ...
Structural trends and basement rock subdivisions in the western Gulf
... farther southwest beneath the Indian Mountain horst. These detailed gravity anomalies are not shown on Garland’s (1953) gravity anomaly map because of the sparseness of gravity meas urements at that time. Thus, gravity data indicate that whatever is causing the gravity anomaly northeast of Prince E ...
... farther southwest beneath the Indian Mountain horst. These detailed gravity anomalies are not shown on Garland’s (1953) gravity anomaly map because of the sparseness of gravity meas urements at that time. Thus, gravity data indicate that whatever is causing the gravity anomaly northeast of Prince E ...
Deep ocean floor sediment
... older rocks lying to their north. It is a major structural plane discernible throughout the length of the Himalayas 6 ) Accretionary wedge or accretionary prism: Formed from sediments that are accreted onto the non-subducting tectonic plate at a convergent plate boundary. Most of the material in the ...
... older rocks lying to their north. It is a major structural plane discernible throughout the length of the Himalayas 6 ) Accretionary wedge or accretionary prism: Formed from sediments that are accreted onto the non-subducting tectonic plate at a convergent plate boundary. Most of the material in the ...
Geologic Provinces of the Caribbean Region
... The Motagua, Polochic and other fault zones form the eastern extension of the Northern Caribbean Plate Boundary Zone in Central America. A left lateral stepover in the boundary between the Caribbean and North America has resulted in a crustal-scale pull-apart basin, the Cayman Trough, in which a 100 ...
... The Motagua, Polochic and other fault zones form the eastern extension of the Northern Caribbean Plate Boundary Zone in Central America. A left lateral stepover in the boundary between the Caribbean and North America has resulted in a crustal-scale pull-apart basin, the Cayman Trough, in which a 100 ...
The NE-Atlantic system
... The late Jurassic-Early Cretaceous period probably represents the most important rift episode in terms of lithospheric stretching and thinning. A new extensional axis propagated northward between Greenland and Canada and was superimposed on the older rift structure. Breakup and early oceanic accreti ...
... The late Jurassic-Early Cretaceous period probably represents the most important rift episode in terms of lithospheric stretching and thinning. A new extensional axis propagated northward between Greenland and Canada and was superimposed on the older rift structure. Breakup and early oceanic accreti ...
Stratigraphic and structural setting of gold mineralization in the Lily
... The Lily Lake area is located in the southeastern portion of the Archean Rice Lake greenstone belt, near the southern margin of the volcano-plutonic Uchi Subprovince of the western Superior Province. In Manitoba, the Rice Lake belt is flanked to the north by the ca. 3.0 Ga continental North Caribou T ...
... The Lily Lake area is located in the southeastern portion of the Archean Rice Lake greenstone belt, near the southern margin of the volcano-plutonic Uchi Subprovince of the western Superior Province. In Manitoba, the Rice Lake belt is flanked to the north by the ca. 3.0 Ga continental North Caribou T ...
Plate Tectonics
... – Planets 1. accretion of Heavy elements 2. attraction of Light gases to dense ...
... – Planets 1. accretion of Heavy elements 2. attraction of Light gases to dense ...
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.