Tectonic setting of Late Cretaceous gold and mercury
... The Kuskokwim Mineral Belt lies in a broad zone of northeast-striking, dextral strike-slip faults that have been active intermittently since about 95 million years ago. The IditarodNixon Fork fault shows at least 90 km of dextral offset since the Late Cretaceous and the Denali fault system, in this ...
... The Kuskokwim Mineral Belt lies in a broad zone of northeast-striking, dextral strike-slip faults that have been active intermittently since about 95 million years ago. The IditarodNixon Fork fault shows at least 90 km of dextral offset since the Late Cretaceous and the Denali fault system, in this ...
Plate Tectonics Chapter 10
... 5. Using, scissors, cut along one of the creases. Start fron any corner, and stop at the center point to create two flaps. Attach one of the flaps on the other. ...
... 5. Using, scissors, cut along one of the creases. Start fron any corner, and stop at the center point to create two flaps. Attach one of the flaps on the other. ...
Name Period
... 3. The German scientist Alfred Wegener proposed a hypothesis now called _____________________. a. paleomagnetism. b. continental drift. c. floating continents. d. sea-floor spreading. 4. Wegener hypothesized that the continents formed part of a single land mass, or __________________. a. mid-ocean r ...
... 3. The German scientist Alfred Wegener proposed a hypothesis now called _____________________. a. paleomagnetism. b. continental drift. c. floating continents. d. sea-floor spreading. 4. Wegener hypothesized that the continents formed part of a single land mass, or __________________. a. mid-ocean r ...
Slide 1
... The evidence Wegener needed was discovered almost 20 years after his death. Geologist found that the sediments nearest the ridge were thinner than those farther away. The rocks also got older as you went farther from the ridge. The ocean floor is also much younger than the continental rock. There ar ...
... The evidence Wegener needed was discovered almost 20 years after his death. Geologist found that the sediments nearest the ridge were thinner than those farther away. The rocks also got older as you went farther from the ridge. The ocean floor is also much younger than the continental rock. There ar ...
Continental Drift
... 2. Indications that the edges of continents are often crumpled by “collisions”: A) Folds and Faults in those mountains B) Evidence for repeated creation and erosion of sedimentary source areas. 3. Indications that continents have moved across latitude: A) Various climatic indicators (rocks and fossi ...
... 2. Indications that the edges of continents are often crumpled by “collisions”: A) Folds and Faults in those mountains B) Evidence for repeated creation and erosion of sedimentary source areas. 3. Indications that continents have moved across latitude: A) Various climatic indicators (rocks and fossi ...
PLATE TECTONICS AND SEDIMENTARY ROCK 1 Plate Tectonics
... Sedimentary rocks comprise nearly 75% of all rocks on the Earth’s surface. Sediment is generated from existing igneous and metamorphic rocks that have been weathered, eroded, and broken down. Upon the deposition of sediment on the earth’s surface, it undergoes lithification to form new rock. At a co ...
... Sedimentary rocks comprise nearly 75% of all rocks on the Earth’s surface. Sediment is generated from existing igneous and metamorphic rocks that have been weathered, eroded, and broken down. Upon the deposition of sediment on the earth’s surface, it undergoes lithification to form new rock. At a co ...
Examples of Rock Families in the San Francisco Bay Area Yilin Lu
... The San Francisco Bay Area is known for its famous view. Yet, not so many people know that it is also an ideal place to study geology since it contains all four major rock families: igneous rock, sedimentary rock, metamorphic rock and hydrothermal rock. In this project, I chose three sites as three ...
... The San Francisco Bay Area is known for its famous view. Yet, not so many people know that it is also an ideal place to study geology since it contains all four major rock families: igneous rock, sedimentary rock, metamorphic rock and hydrothermal rock. In this project, I chose three sites as three ...
(with Death Valley) Geoscience 10: Geology of The National Parks
... The deeper a mine or oil well is, the hotter it is at the bottom; volcanoes bring up heat from below; Earth’s heat made mostly by decay of natural radioactive atoms in rocks; How materials (and people!) behave depends on what they are (iron, silica, etc.) and on the conditions they are placed in (he ...
... The deeper a mine or oil well is, the hotter it is at the bottom; volcanoes bring up heat from below; Earth’s heat made mostly by decay of natural radioactive atoms in rocks; How materials (and people!) behave depends on what they are (iron, silica, etc.) and on the conditions they are placed in (he ...
The Earth`s Structure - Geog
... Thin, outer-layer of the earth. It is as thin as the skin of an apple is to its flesh. Mantle Composed mainly of silicate rocks, which contain a lot of magnesium and iron. It extends to a depth of 2900km. Temperatures can reach 5000 degrees Celsius, which generate convection currents. Core Contains ...
... Thin, outer-layer of the earth. It is as thin as the skin of an apple is to its flesh. Mantle Composed mainly of silicate rocks, which contain a lot of magnesium and iron. It extends to a depth of 2900km. Temperatures can reach 5000 degrees Celsius, which generate convection currents. Core Contains ...
- Bushman Resources
... Porphyry copper-gold deposits in the Molong Volcanic Belt are concentrated within the Lachlan Transverse Zone, a key arc-normal WNW-trending structure that lies parallel to the transform boundary along the southern margin of the restored Macquarie Arc. Included in this setting are the Cadia Intrusiv ...
... Porphyry copper-gold deposits in the Molong Volcanic Belt are concentrated within the Lachlan Transverse Zone, a key arc-normal WNW-trending structure that lies parallel to the transform boundary along the southern margin of the restored Macquarie Arc. Included in this setting are the Cadia Intrusiv ...
Geology of the Catalinas
... from central Mexico to Oregon. East-west stretching of this part of the continent between 25 and 5 million years ago caused the Earth’s crust to thin and break along faults (cracks) into long, north-and northwest-trending blocks. Some of these blocks were uplifted to form mountain ranges, such as th ...
... from central Mexico to Oregon. East-west stretching of this part of the continent between 25 and 5 million years ago caused the Earth’s crust to thin and break along faults (cracks) into long, north-and northwest-trending blocks. Some of these blocks were uplifted to form mountain ranges, such as th ...
Chapter 4: Earthquakes
... – The difference is used to find the distance to the epicenter – the longer it takes, the farther away the epicenter. – A circle is drawn around each point (location). The point where they all cross is the epicenter. ...
... – The difference is used to find the distance to the epicenter – the longer it takes, the farther away the epicenter. – A circle is drawn around each point (location). The point where they all cross is the epicenter. ...
Chapter 4—Rocks and Minerals: Documents that
... andesite (63): A volcanic rock that in chemical composition is intermediate between basalt and granite. anhydrite (57): A granular, white, anhydrous (water-lacking) calcium sulfate (CaSO4). aragonite (57): Calcium carbonate (the same composition as calcite, but a polymorph of calcite) augite (55): A ...
... andesite (63): A volcanic rock that in chemical composition is intermediate between basalt and granite. anhydrite (57): A granular, white, anhydrous (water-lacking) calcium sulfate (CaSO4). aragonite (57): Calcium carbonate (the same composition as calcite, but a polymorph of calcite) augite (55): A ...
Movement in Earth Notes
... Plate Tectonics • Movement happens because Earth’s makeup – Lithosphere • Crust and upper mantle • These are the ‘plates’ ...
... Plate Tectonics • Movement happens because Earth’s makeup – Lithosphere • Crust and upper mantle • These are the ‘plates’ ...
SXR339 Ancient Mountains ISBN0749258470
... sourced, with clasts of basic and ultrabasic material derived from the Ballantrae ophiolite, as well as clasts of granitic to intermediate igneous rocks and occasional low-grade schists. The granites are calc-alkaline in composition, suggesting derivation from a magmatic arc. Isotopic ages obtained ...
... sourced, with clasts of basic and ultrabasic material derived from the Ballantrae ophiolite, as well as clasts of granitic to intermediate igneous rocks and occasional low-grade schists. The granites are calc-alkaline in composition, suggesting derivation from a magmatic arc. Isotopic ages obtained ...
stress that occurs when an object is squeezed
... Strike-Slip Fault These faults form when opposing forces cause rock to break and move horizontally. ...
... Strike-Slip Fault These faults form when opposing forces cause rock to break and move horizontally. ...
Natural Hazards - Cal State LA
... Natural Disasters Earthquake Predictions & Tectonic Environments ...
... Natural Disasters Earthquake Predictions & Tectonic Environments ...
Pendower Beach, Cornwall
... rock masses or strata of different ages, indicating that sediment deposition was not continuous. In general, the older layer was exposed to erosion for an interval of time before deposition of the younger, but the term is used to describe any break in the sedimentary geologic record. ...
... rock masses or strata of different ages, indicating that sediment deposition was not continuous. In general, the older layer was exposed to erosion for an interval of time before deposition of the younger, but the term is used to describe any break in the sedimentary geologic record. ...
Evidence for Continental Drift
... According to plate tectonic theory, when tectonic plates move across Earth’s surface, they carry the continents with them. Many volcanoes and earthquake zones on a map reveal the boundaries between the plates. Chains of volcanic islands, such as the Hawaiian Islands, reveal where tectonic plates hav ...
... According to plate tectonic theory, when tectonic plates move across Earth’s surface, they carry the continents with them. Many volcanoes and earthquake zones on a map reveal the boundaries between the plates. Chains of volcanic islands, such as the Hawaiian Islands, reveal where tectonic plates hav ...
Melting of the mantle
... Island Arc Petrogenesis Altered oceanic crust begins to dehydrate at depths ~ 50 km or less, as chlorite, phengite, and other hydrous phyllosilicates decompose. Further dehydration takes place at greater depths as other hydrous phases become unstable, including amphibole at about 3 GPa. The slab ...
... Island Arc Petrogenesis Altered oceanic crust begins to dehydrate at depths ~ 50 km or less, as chlorite, phengite, and other hydrous phyllosilicates decompose. Further dehydration takes place at greater depths as other hydrous phases become unstable, including amphibole at about 3 GPa. The slab ...
kittitas valley field trip
... outcrop. A short path leads down to the lake here. The outcrop is modest, but provides good exposures. The rock here is greenschist, a metamorphic variety. It is the metamorphic equivalent of basalt, where the original olivine, pyroxene and feldspar minerals have been changed to chlorite, actinolite ...
... outcrop. A short path leads down to the lake here. The outcrop is modest, but provides good exposures. The rock here is greenschist, a metamorphic variety. It is the metamorphic equivalent of basalt, where the original olivine, pyroxene and feldspar minerals have been changed to chlorite, actinolite ...
The Rocky Mountains
... convection and slowly cooled. Over thousands of years, the older sedimentary rock eroded and left the harder igneous formation. The sedimentary rock acted as a mold for the intrusive magma, causing it to harden and cool where the sedimentary rock was strongest. ...
... convection and slowly cooled. Over thousands of years, the older sedimentary rock eroded and left the harder igneous formation. The sedimentary rock acted as a mold for the intrusive magma, causing it to harden and cool where the sedimentary rock was strongest. ...
Geologic Time
... • Phanerozoic ("visible life") – the most recent eon, plenty of fossils • Proterozoic • Archean • Hadean – the oldest eon (The Proterozoic, Archean, and Hadean are often referred to as just the Precambrian) ...
... • Phanerozoic ("visible life") – the most recent eon, plenty of fossils • Proterozoic • Archean • Hadean – the oldest eon (The Proterozoic, Archean, and Hadean are often referred to as just the Precambrian) ...
1. What is rock? 2. The layer of solid rock that surrounds Earth`s
... a. Magma that cools quickly forms igneous rocks with large crystals. b. Igneous rock that formed beneath Earth’s surface is intrusive rock. c. Granite is an extrusive rock. d. Basalt is extrusive rock that makes up the ocean floor. ...
... a. Magma that cools quickly forms igneous rocks with large crystals. b. Igneous rock that formed beneath Earth’s surface is intrusive rock. c. Granite is an extrusive rock. d. Basalt is extrusive rock that makes up the ocean floor. ...
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.