Shirbatu Granite Dimension Stone in Bamyan Province
... The Shirbatu granite is part of a huge Triassic aged calcalkaline batholith, named as “Bamyan Granitoid Complex” (Figure 3) which extends over thousands of square kilometers from the SW to the NE across Bamyan and Baghlan Provinces. The complex is part of a number of igneous complexes formed during ...
... The Shirbatu granite is part of a huge Triassic aged calcalkaline batholith, named as “Bamyan Granitoid Complex” (Figure 3) which extends over thousands of square kilometers from the SW to the NE across Bamyan and Baghlan Provinces. The complex is part of a number of igneous complexes formed during ...
CandyQuakes - New Haven Science
... c Tensional –forces that pull crustal rocks apart at divergent boundaries. They cause rock to get longer. c Compressional – forces that squeeze crustal rock together at convergent boundaries. They cause rock to shorten. c Transversal – forces that push crustal rock horizontally and in different dire ...
... c Tensional –forces that pull crustal rocks apart at divergent boundaries. They cause rock to get longer. c Compressional – forces that squeeze crustal rock together at convergent boundaries. They cause rock to shorten. c Transversal – forces that push crustal rock horizontally and in different dire ...
Proterozoic History
... Mackenzie swarm in Canada. The latter extends for 3000 km and is up to 500 km wide. Many of the swarms were emplaced largely in intracratonic settings, and thus may reflect the continents’ (incipient) attempt to rift. The intrusion of such large volumes of basic material represents one of the major ...
... Mackenzie swarm in Canada. The latter extends for 3000 km and is up to 500 km wide. Many of the swarms were emplaced largely in intracratonic settings, and thus may reflect the continents’ (incipient) attempt to rift. The intrusion of such large volumes of basic material represents one of the major ...
Interpretive Geology of Cypress Provincial Park
... dyke. Close to the drainage ditch is another volcanic dyke (about 0.6 m thick) but at right angles to the ditch and ski-run. This dike is much finer-grained than the dykes seen so far & has no phenocrysts. It probably has a different age, composition & mode of emplacement to the other dykes. It comp ...
... dyke. Close to the drainage ditch is another volcanic dyke (about 0.6 m thick) but at right angles to the ditch and ski-run. This dike is much finer-grained than the dykes seen so far & has no phenocrysts. It probably has a different age, composition & mode of emplacement to the other dykes. It comp ...
The Tertiary Volcanic Rocks of Lower Sandy Bay, Hobart
... dolerite boulders in a clay matrix. This is also well exposed along Nile Avenue. Following the work of Carey (1946, 1954) it is believed that early in the Tertiary, major faulting took place along the present location of the Derwent which was then an irregular, complex graben. Lakes were formed on t ...
... dolerite boulders in a clay matrix. This is also well exposed along Nile Avenue. Following the work of Carey (1946, 1954) it is believed that early in the Tertiary, major faulting took place along the present location of the Derwent which was then an irregular, complex graben. Lakes were formed on t ...
Rivers and Sediments
... • Alluvial fan ‐ large, fan‐ or cone‐shaped pile of sediment that forms where stream velocity decreases as it emerges from a narrow mountain canyon onto a flat plain ...
... • Alluvial fan ‐ large, fan‐ or cone‐shaped pile of sediment that forms where stream velocity decreases as it emerges from a narrow mountain canyon onto a flat plain ...
Chapter 14: Sediment and Sedimentary Rocks
... gypsum) between bedding planes. The presence of abundant gypsum tells us that this rock formed under evaporative conditions. Once a sediment is deposited, it becomes hardened, or lithified, by two processes, including compaction and cementation (Figure 14.6). Common sedimentary cements include calci ...
... gypsum) between bedding planes. The presence of abundant gypsum tells us that this rock formed under evaporative conditions. Once a sediment is deposited, it becomes hardened, or lithified, by two processes, including compaction and cementation (Figure 14.6). Common sedimentary cements include calci ...
LARGE_SC ALE " ROCK-MASS MOVEMENT AT
... and a local relief of 200- 1,600m. The Landsat images clearly shows a rhombusshaped gap about 15km long and 18km wide in the middle of this mountain range.Correspondingly, about 23km north of this gap, is an isolated rhombus-shaped hill named IITao-Hua-La-Shan",Which has a local relief essentially t ...
... and a local relief of 200- 1,600m. The Landsat images clearly shows a rhombusshaped gap about 15km long and 18km wide in the middle of this mountain range.Correspondingly, about 23km north of this gap, is an isolated rhombus-shaped hill named IITao-Hua-La-Shan",Which has a local relief essentially t ...
Precambrian geology and the Bible: a harmony
... Archean cratons (continental areas which have not been substantially shortened or stretched since 2.5 Ga) may have cold mantle roots3 that extend twice as deep (to about 200 km) as the lithosphere beneath younger continental crust and thermally mature ocean basins. Evidence in favour of this include ...
... Archean cratons (continental areas which have not been substantially shortened or stretched since 2.5 Ga) may have cold mantle roots3 that extend twice as deep (to about 200 km) as the lithosphere beneath younger continental crust and thermally mature ocean basins. Evidence in favour of this include ...
- Canada-Nunavut Geoscience Office
... (Hoffman, 1988). The northern part of the study area includes the Wager Shear Zone, a >25 km thick, dextral mylonite zone that parallels the southern shore of Wager Bay (Figure 1; Henderson and Broome, 1990; Henderson et al., 1991). This shear zone is associated with a prominent aeromagnetic anomaly ...
... (Hoffman, 1988). The northern part of the study area includes the Wager Shear Zone, a >25 km thick, dextral mylonite zone that parallels the southern shore of Wager Bay (Figure 1; Henderson and Broome, 1990; Henderson et al., 1991). This shear zone is associated with a prominent aeromagnetic anomaly ...
File
... 2. Fault-Block Mountains form when large blocks of the Earth’s crust drop down relative to other blocks; tension; sharp, jagged peaks Example: The Teton Mountains in Wyoming ...
... 2. Fault-Block Mountains form when large blocks of the Earth’s crust drop down relative to other blocks; tension; sharp, jagged peaks Example: The Teton Mountains in Wyoming ...
Argyll and the Islands - Scottish Natural Heritage
... Starting about 730 million years ago, the Dalradian sediments were laid down on the edge of a continent known as Rodinia. Around 1800 million years ago, new magma was injected into the Earth’s crust and was transformed into the gneisses of the Rhinns of Islay. Brown bars indicate periods of time rep ...
... Starting about 730 million years ago, the Dalradian sediments were laid down on the edge of a continent known as Rodinia. Around 1800 million years ago, new magma was injected into the Earth’s crust and was transformed into the gneisses of the Rhinns of Islay. Brown bars indicate periods of time rep ...
L - Saskatchewan Publications Centre
... complex, that is overlain to the south by flat-lying Phanerozoic rocks and grades northward into the Kisseynew Gneiss Belt. Excellent reviews of the geology of the belt are presented by Bailes et al. (1987), Syme et al. (1982) and Bailes (1971). The geology of the Amisk - Flin Flan region, in which ...
... complex, that is overlain to the south by flat-lying Phanerozoic rocks and grades northward into the Kisseynew Gneiss Belt. Excellent reviews of the geology of the belt are presented by Bailes et al. (1987), Syme et al. (1982) and Bailes (1971). The geology of the Amisk - Flin Flan region, in which ...
Earth`s Dynamic Syst..
... Most of the rock in shields was formed several kilometers below the surface. They are now exposed only because the shields have been subjected to extensive uplift and erosion. When the basement complex is covered with a veneer of sedimentary rocks, a stable platform is created. The layered sedimenta ...
... Most of the rock in shields was formed several kilometers below the surface. They are now exposed only because the shields have been subjected to extensive uplift and erosion. When the basement complex is covered with a veneer of sedimentary rocks, a stable platform is created. The layered sedimenta ...
Geologic Time - Tulane University
... 1800s worked out 7 basic principles of stratigraphy that allowed them, and now us, to work out the relative ages of rocks. Once these age relations were worked out, another principle fell into place - the principle of fossil succession. We discuss the 7 principles of stratigraphy first and then see ...
... 1800s worked out 7 basic principles of stratigraphy that allowed them, and now us, to work out the relative ages of rocks. Once these age relations were worked out, another principle fell into place - the principle of fossil succession. We discuss the 7 principles of stratigraphy first and then see ...
Metamorphism: The Role of Fluids
... Most of the Earth’s lithosphere evolves under conditions the sites of retrograde and prograde metamorphism plays where metamorphic processes are the dominant transfor- a key role in the global water and carbon cycles and ultimation mechanism. From the early 1980s until quite mately in the coupling o ...
... Most of the Earth’s lithosphere evolves under conditions the sites of retrograde and prograde metamorphism plays where metamorphic processes are the dominant transfor- a key role in the global water and carbon cycles and ultimation mechanism. From the early 1980s until quite mately in the coupling o ...
Figure 1) Map of the Saint Lawrence Rift System
... New York, and Canada. In most of New York, earthquakes aren’t common, except in one area known as the Saint Lawrence rift system. The Saint Lawrence rift system is in the middle of a complex zone. Its faults are speculated to come from three major events: The spreading caused by the Iapetus Ocean, f ...
... New York, and Canada. In most of New York, earthquakes aren’t common, except in one area known as the Saint Lawrence rift system. The Saint Lawrence rift system is in the middle of a complex zone. Its faults are speculated to come from three major events: The spreading caused by the Iapetus Ocean, f ...
2. Formation of Soils
... expand and fracture parallel to the surface. e.g. Intrusive igneous rocks (e.g. granite) are formed deep beneath the Earth's surface. They are under tremendous pressure because of the overlying rock material. When erosion removes the overlying rock material, these intrusive rocks are exposed and the ...
... expand and fracture parallel to the surface. e.g. Intrusive igneous rocks (e.g. granite) are formed deep beneath the Earth's surface. They are under tremendous pressure because of the overlying rock material. When erosion removes the overlying rock material, these intrusive rocks are exposed and the ...
Simon Bryant - Ikitomi Design home
... that has accumulated over a long time.”1 Earthquakes occur far more often than most people think. However, few of these earthquakes are strong enough to be felt by humans. Even fewer have the strength to cause major damage to people or to property. In fact, many earthquakes happen in areas where no ...
... that has accumulated over a long time.”1 Earthquakes occur far more often than most people think. However, few of these earthquakes are strong enough to be felt by humans. Even fewer have the strength to cause major damage to people or to property. In fact, many earthquakes happen in areas where no ...
Supercycles in subduction zones
... supercycle, the initial quakes rupture only parts of a subduction zone segment, whereas the final When tectonic plates collide, they produce "superquake" affects the entire segment. earthquakes like the recent one in Nepal. Researchers at ETH Zurich are providing new Several different theories have ...
... supercycle, the initial quakes rupture only parts of a subduction zone segment, whereas the final When tectonic plates collide, they produce "superquake" affects the entire segment. earthquakes like the recent one in Nepal. Researchers at ETH Zurich are providing new Several different theories have ...
The Composition of the Continental Crust
... Mixture of Archean basalt & Archean granite* Assume 50% of 40 mWm-2 surface heat flow derives from crust: 66% basalt, 33% granite *A special type of granite called tonalite, with relatively low K, Th and U ...
... Mixture of Archean basalt & Archean granite* Assume 50% of 40 mWm-2 surface heat flow derives from crust: 66% basalt, 33% granite *A special type of granite called tonalite, with relatively low K, Th and U ...
NOAA Mid Oceanic Ridges
... the seam on a baseball. It is clearly visible on this map of global topography above and below sea level. 4. The ridge system forms the ___________ and ____________ mountain range on Earth. It winds its way between the continents and is more than 65,000 kilometers long and 1,500 km wide. 5. A steep- ...
... the seam on a baseball. It is clearly visible on this map of global topography above and below sea level. 4. The ridge system forms the ___________ and ____________ mountain range on Earth. It winds its way between the continents and is more than 65,000 kilometers long and 1,500 km wide. 5. A steep- ...
volcanic activity at sedankinsky dol lava field, sredinny ridge during
... monogenetic vents. The recent volcanism is restricted to three main zones: the Eastern Volcanic Belt and South Kamchatka, the Central Kamchatka Depression, and the Sredinny Ridge. While the first two zones are relatively well investigated, few data is currently available on the Sredinny Ridge magmat ...
... monogenetic vents. The recent volcanism is restricted to three main zones: the Eastern Volcanic Belt and South Kamchatka, the Central Kamchatka Depression, and the Sredinny Ridge. While the first two zones are relatively well investigated, few data is currently available on the Sredinny Ridge magmat ...
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.