Volcanic Rocks of South-Central New Mexico
... overlain by the late basaltic volcanic sequence. In the Animas Hills area, this rock is a black to dark blue, massive to scoriaceous basaltic andesite with a maximum thickness of about 800 feet. Farther to the south, just north of Sibley Mountain, this sequence also includes a series of latitic flow ...
... overlain by the late basaltic volcanic sequence. In the Animas Hills area, this rock is a black to dark blue, massive to scoriaceous basaltic andesite with a maximum thickness of about 800 feet. Farther to the south, just north of Sibley Mountain, this sequence also includes a series of latitic flow ...
Geology: Earthquake Concepts ANSWER KEY
... of a body of rock. Sometimes stress builds up between two bodies of rock and they can slide past, over, or under one another fairly quickly. This sudden release of stress can cause earthquakes. Earthquakes are most common near major faults. Use your knowledge to answer the following questions comple ...
... of a body of rock. Sometimes stress builds up between two bodies of rock and they can slide past, over, or under one another fairly quickly. This sudden release of stress can cause earthquakes. Earthquakes are most common near major faults. Use your knowledge to answer the following questions comple ...
Tectonic Impacts #2
... A sudden and violent shaking of the ground, sometimes causing great destruction, as a result of movements within the earth's crust fault A fracture in a rock where there has been relative movement on either side of the fracture felsic focus Fold mountain geosyncline Gondwana ...
... A sudden and violent shaking of the ground, sometimes causing great destruction, as a result of movements within the earth's crust fault A fracture in a rock where there has been relative movement on either side of the fracture felsic focus Fold mountain geosyncline Gondwana ...
Chapter 4—Rocks and Minerals: Documents that Record
... nonfoliated metamorphic rocks (71): A metamorphic texture in which there is no discernable preferred orientation of mineral grains. Examples are marble or quartzite. obsidian (58): A jet-black volcanic glass, usually of rhyolitic composition, formed by rapid cooling of viscous lava; generally forms ...
... nonfoliated metamorphic rocks (71): A metamorphic texture in which there is no discernable preferred orientation of mineral grains. Examples are marble or quartzite. obsidian (58): A jet-black volcanic glass, usually of rhyolitic composition, formed by rapid cooling of viscous lava; generally forms ...
Igneous Rocks and Volcanism fill
... II. Cooling rock can’t pull in the edges and tension fractures the rock into an hexagonal pattern. 2. Within the last 200 million years there have been at least six major events a) Deccan Traps along the western coast of India I. 66 million years ago (coincides with extinction of the dinosaurs) II. ...
... II. Cooling rock can’t pull in the edges and tension fractures the rock into an hexagonal pattern. 2. Within the last 200 million years there have been at least six major events a) Deccan Traps along the western coast of India I. 66 million years ago (coincides with extinction of the dinosaurs) II. ...
Petrogenetic Types, Tectonic Settings and Mineral Potential of
... types of granitoid rocks may have potential for different type of mineral deposits, some of which are among the largest mineral deposits on Earth. Despite this, granitoid rocks have generally not been explored to the same extent as the belts of volcanic and sedimentary rocks that host the majority o ...
... types of granitoid rocks may have potential for different type of mineral deposits, some of which are among the largest mineral deposits on Earth. Despite this, granitoid rocks have generally not been explored to the same extent as the belts of volcanic and sedimentary rocks that host the majority o ...
magma
... As a rock is heated, the minerals with the lowest melting points begin to melt. If melting continues and all of the rock is melted, then the composition of the melt matches that of the rock. In most cases, melting is not complete and only ...
... As a rock is heated, the minerals with the lowest melting points begin to melt. If melting continues and all of the rock is melted, then the composition of the melt matches that of the rock. In most cases, melting is not complete and only ...
The Dynamic Crust
... A convergent plate boundary occurs when two plates collide Subduction occurs when one plate sinks under another plate This can result in ocean trenches and volcanic island arcs ...
... A convergent plate boundary occurs when two plates collide Subduction occurs when one plate sinks under another plate This can result in ocean trenches and volcanic island arcs ...
Istanbul Himalayas Tokyo San Andreas Fault Thingvellir East
... been built as one of the most ‘earthquakeproof’ cities on the planet. This contrasts with Istanbul, which is also located on and near major tectonic boundaries, but has many ancient buildings and a large population; a large earthquake in this area could have devastating effects in terms of loss of l ...
... been built as one of the most ‘earthquakeproof’ cities on the planet. This contrasts with Istanbul, which is also located on and near major tectonic boundaries, but has many ancient buildings and a large population; a large earthquake in this area could have devastating effects in terms of loss of l ...
ES Practice quiz part 2 sect 3
... D. The following diagram shows how island arcs form. Label the type(s) of crust (include the word “crust” in each answer), and trench. Then, answer the questions that follow. Magma ...
... D. The following diagram shows how island arcs form. Label the type(s) of crust (include the word “crust” in each answer), and trench. Then, answer the questions that follow. Magma ...
Q: What theory explains why the continents move? Q: What causes
... Q: True or False? Evidence for sea-floor spreading has come from magnetic minerals on the ocean floor. ...
... Q: True or False? Evidence for sea-floor spreading has come from magnetic minerals on the ocean floor. ...
2. Fault mechanics: some basic aspects
... may progressively rotate the active fault plane so that they may acquire an unfavourable orientation for re-shearing, may lock-up and be abandoned. Further deformation will require the nucleation of new, favourably oriented faults. Most of the theory on fault mechanics is based on the assumption of ...
... may progressively rotate the active fault plane so that they may acquire an unfavourable orientation for re-shearing, may lock-up and be abandoned. Further deformation will require the nucleation of new, favourably oriented faults. Most of the theory on fault mechanics is based on the assumption of ...
1A_RocksEngProperties
... (magma) can intrude and cross-cut preexisting rocks; if we date the intrusive igneous rock then we know the rock it cuts is older than that absolute date. This is one type of relative dating. ...
... (magma) can intrude and cross-cut preexisting rocks; if we date the intrusive igneous rock then we know the rock it cuts is older than that absolute date. This is one type of relative dating. ...
2B_RocksEngProperties
... (magma) can intrude and cross-cut preexisting rocks; if we date the intrusive igneous rock then we know the rock it cuts is older than that absolute date. This is one type of relative dating. ...
... (magma) can intrude and cross-cut preexisting rocks; if we date the intrusive igneous rock then we know the rock it cuts is older than that absolute date. This is one type of relative dating. ...
Earth`s History - Red Hook Central Schools
... – An extrusion is younger than the rock below it, but older than the rock that will form on top. – The rock below the extrusion will show a zone of contact metamorphism where the hot lava baked it. ...
... – An extrusion is younger than the rock below it, but older than the rock that will form on top. – The rock below the extrusion will show a zone of contact metamorphism where the hot lava baked it. ...
READING-STUDY GUIDE 3-5
... 2. How long ago did Pangaea begin to break apart? ________________________________ 3. Explain how fossil evidence supports Wegener’s hypothesis. _______________________ ...
... 2. How long ago did Pangaea begin to break apart? ________________________________ 3. Explain how fossil evidence supports Wegener’s hypothesis. _______________________ ...
Convergent boundary
... move apart, the rock in the seafloor grows older as its distance from the rift zone increases, and as it ages, it cools and becomes denser and is buried under marine sediments that are deposited on the seafloor. ...
... move apart, the rock in the seafloor grows older as its distance from the rift zone increases, and as it ages, it cools and becomes denser and is buried under marine sediments that are deposited on the seafloor. ...
A case for drilling the Dufek layered mafic intrusion, Antarctica
... Nd/144Nd = 0.51213 ± 1 – 0.51233 ± 4; and 207Pb/204Pb = 15.544 – 15.873). These ratios can vary both between one mineral type in different rocks and between different mineral types in the same rock. Differences between minerals in the same rock become more pronounced toward the top of the intrusion, ...
... Nd/144Nd = 0.51213 ± 1 – 0.51233 ± 4; and 207Pb/204Pb = 15.544 – 15.873). These ratios can vary both between one mineral type in different rocks and between different mineral types in the same rock. Differences between minerals in the same rock become more pronounced toward the top of the intrusion, ...
The modern picture of plate tectonics
... • Some points in the asthenosphere are hotter than others. • As a continent moves over a hot spot, a chain of volcanoes is formed. . . • . . . but this time the chain is parallel to the direction the continent is moving, not perpendicular like a true island arc. • At any given time, the newes ...
... • Some points in the asthenosphere are hotter than others. • As a continent moves over a hot spot, a chain of volcanoes is formed. . . • . . . but this time the chain is parallel to the direction the continent is moving, not perpendicular like a true island arc. • At any given time, the newes ...
Plate Tectonics - Effingham County Schools
... • Continental/Oceanic collisions: oceanic plates sink under the continental plate creating a subduction zone – Forms deep-ocean trench, volcanic coastal mountains ...
... • Continental/Oceanic collisions: oceanic plates sink under the continental plate creating a subduction zone – Forms deep-ocean trench, volcanic coastal mountains ...
Earth`s Interior
... lithosphere. It is soft and flows more readily than the mantle. It provides a layer over which the lithosphere moves. ...
... lithosphere. It is soft and flows more readily than the mantle. It provides a layer over which the lithosphere moves. ...
CH9 (ppt檔9895 KB)
... Rock Strength (3) By about 1300oC, rock strength is very low. Brittle deformation is no longer possible. The disappearance of all brittle deformation properties marks the lithosphere-asthenosphere boundary. In the crust large movements happens so slowly (low strain rates) that they can be mea ...
... Rock Strength (3) By about 1300oC, rock strength is very low. Brittle deformation is no longer possible. The disappearance of all brittle deformation properties marks the lithosphere-asthenosphere boundary. In the crust large movements happens so slowly (low strain rates) that they can be mea ...
The Dynamic Crust Topic 4 Topic 12 in Review Book
... A unifying model that explains most major features and events of the earth is plate tectonics which states that the earth’s lithosphere is broken into sections called plates. Their movement and interaction produce the major changes in the earth’s surface The plates move at a rate of ~3 cm/year Plate ...
... A unifying model that explains most major features and events of the earth is plate tectonics which states that the earth’s lithosphere is broken into sections called plates. Their movement and interaction produce the major changes in the earth’s surface The plates move at a rate of ~3 cm/year Plate ...
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.