Plate Tectonics Web Activity
... Geologists have known for over a century that a ridge exists in the middle of the Atlantic Ocean. The MidAtlantic Ridge is 6,500 feet (2,000 m) above the adjacent sea floor, which is at a depth of about 20,000 feet (6,000 m) below sea level. In the 1950s, a seismologist, a scientist who specializes ...
... Geologists have known for over a century that a ridge exists in the middle of the Atlantic Ocean. The MidAtlantic Ridge is 6,500 feet (2,000 m) above the adjacent sea floor, which is at a depth of about 20,000 feet (6,000 m) below sea level. In the 1950s, a seismologist, a scientist who specializes ...
Geologic Time and the Fossil Record
... After rock erodes, it is deposited somewhere. Newer deposits are left above older ones, so by looking at how an area of rock is layered, one can determine their relative age. -This principle is called superposition, and it says that younger deposits of rock lay above older deposits. ...
... After rock erodes, it is deposited somewhere. Newer deposits are left above older ones, so by looking at how an area of rock is layered, one can determine their relative age. -This principle is called superposition, and it says that younger deposits of rock lay above older deposits. ...
Document
... •Tectonism Normal faulting on a grand scale: The Teton Mountains in Wyoming are on the up side of the fault, Jackson Hole and other areas east of the mountains are on the down side. ...
... •Tectonism Normal faulting on a grand scale: The Teton Mountains in Wyoming are on the up side of the fault, Jackson Hole and other areas east of the mountains are on the down side. ...
Chapter 3 - Government of New Brunswick
... was a collision between the earth and an asteroid, a catastrophe that led, among other things, to the extinction of dinosaurs. New Brunswick rocks during this period became increasingly weathered and eroded down to a fairly level landscape surface that bore little resemblance to the contrasting high ...
... was a collision between the earth and an asteroid, a catastrophe that led, among other things, to the extinction of dinosaurs. New Brunswick rocks during this period became increasingly weathered and eroded down to a fairly level landscape surface that bore little resemblance to the contrasting high ...
Galera, uma leitura no texto da UDESC 2012. Tomara que não seja
... THE GRAVE OF SHELLEY by: Oscar Wilde Like burnt-out torches by a sick man's bed Gaunt cypress-trees stand round the sun-bleached stone; Here doth the little night-owl make her throne, And the slight lizard show his jewelled head. And, where the chaliced poppies flame to red, In the still chamber of ...
... THE GRAVE OF SHELLEY by: Oscar Wilde Like burnt-out torches by a sick man's bed Gaunt cypress-trees stand round the sun-bleached stone; Here doth the little night-owl make her throne, And the slight lizard show his jewelled head. And, where the chaliced poppies flame to red, In the still chamber of ...
Independence Valley (NW Elko)
... Hot Sulphur Springs (Map): The Tuscarora Geothermal Area is located in northern Independence Valley, ~80 km north-northwest of Elko and ~17 km north of Tuscarora. Bowman and Cole (1982) determined that Independence Mountains were the source of recharge for the hydrothermal fluids. A closer highland ...
... Hot Sulphur Springs (Map): The Tuscarora Geothermal Area is located in northern Independence Valley, ~80 km north-northwest of Elko and ~17 km north of Tuscarora. Bowman and Cole (1982) determined that Independence Mountains were the source of recharge for the hydrothermal fluids. A closer highland ...
Geologic Time
... All Pb in Zircon is due to decay and is relative to absolute age. Zircons are very durable – can survive several cycles of erosion/ depositions: Zircons are Forever !!!!! Radiometric dating measures when the clock was set/reset. Clock can be reset after formation (e.g., metamorphism). Allows absolut ...
... All Pb in Zircon is due to decay and is relative to absolute age. Zircons are very durable – can survive several cycles of erosion/ depositions: Zircons are Forever !!!!! Radiometric dating measures when the clock was set/reset. Clock can be reset after formation (e.g., metamorphism). Allows absolut ...
The Outer Hebrides - Scottish Natural Heritage
... The Lewisian gneisses are hard rocks, not easily broken, yet over the years they have been worked by humans for a variety of reasons. Some of the most beautiful examples of the gneisses can be seen in the standing stones that are found all across the islands. The most famous site is undoubtedly that ...
... The Lewisian gneisses are hard rocks, not easily broken, yet over the years they have been worked by humans for a variety of reasons. Some of the most beautiful examples of the gneisses can be seen in the standing stones that are found all across the islands. The most famous site is undoubtedly that ...
Fossils and the diversity of life
... • Elongate belts of weakly metamorphosed rock separating larger masses of felsic protocontinents • Make up large portions of Archean terranes • Age of most greenstone belts is ~2.5–3.0 billion years • Include metamorphosed mixtures of mafic and felsic volcanics, volcanic sediments, turbidites • Prob ...
... • Elongate belts of weakly metamorphosed rock separating larger masses of felsic protocontinents • Make up large portions of Archean terranes • Age of most greenstone belts is ~2.5–3.0 billion years • Include metamorphosed mixtures of mafic and felsic volcanics, volcanic sediments, turbidites • Prob ...
Inter-relationship between tectonic, magmatic and sedimentary
... are a set of extensional detachment faults. The study of these fault systems show that they are far more complex as previously assumed. These detachment faults are polyphase, interact in a complex way with ductile layers and are associated with sedimentary systems that migrate while new crust or man ...
... are a set of extensional detachment faults. The study of these fault systems show that they are far more complex as previously assumed. These detachment faults are polyphase, interact in a complex way with ductile layers and are associated with sedimentary systems that migrate while new crust or man ...
Pacific Ocean - University of Hawaii
... Pacific Ocean: The Pacific Ocean is the largest of the world's five oceans Location: the body of water between the Southern Ocean, Asia, Australia and the western hemisphere Area: 155.6 million square km, or about 15 times the size of the US. The Pacific Ocean covers about 28 per cent of the globa ...
... Pacific Ocean: The Pacific Ocean is the largest of the world's five oceans Location: the body of water between the Southern Ocean, Asia, Australia and the western hemisphere Area: 155.6 million square km, or about 15 times the size of the US. The Pacific Ocean covers about 28 per cent of the globa ...
Introduction - Government of Nova Scotia
... Late Ordovician age, and in the Devonian during the Acadian Orogeny. At the close of the Paleozoic the Appalachian Orogeny had only local affects on the rocks of Nova Scotia. Precambrian rocks in the Province are mostly concealed under Paleozoic and younger strata except in the Cape Breton Highlands ...
... Late Ordovician age, and in the Devonian during the Acadian Orogeny. At the close of the Paleozoic the Appalachian Orogeny had only local affects on the rocks of Nova Scotia. Precambrian rocks in the Province are mostly concealed under Paleozoic and younger strata except in the Cape Breton Highlands ...
AIM: Introduce you to scientific study of the world`s oceans and seas
... All earthquakes occur in lithosphere •Intermediate & deep focus earthquakes occur where slabs of lithosphere extend to depth •Recognize lithosphere by its relatively high seismic velocity & the relatively low attenuation of seismic waves ...
... All earthquakes occur in lithosphere •Intermediate & deep focus earthquakes occur where slabs of lithosphere extend to depth •Recognize lithosphere by its relatively high seismic velocity & the relatively low attenuation of seismic waves ...
Ch 11 - Mr. Neason`s Earth Science
... Rather than a single fracture, large strike-slip faults usually consist of a zone of roughly parallel fractures. The zone may be up to several kilometers wide. The most recent movement is often along a section only a few meters wide, which may offset features such as a stream channels. Crushed and b ...
... Rather than a single fracture, large strike-slip faults usually consist of a zone of roughly parallel fractures. The zone may be up to several kilometers wide. The most recent movement is often along a section only a few meters wide, which may offset features such as a stream channels. Crushed and b ...
Fold Mountains
... between Earth movements during which sedimentary rocks, thousands of metres thick, formed in huge depressions called geosynclines. 2) Rivers carried sediments and deposited them into the depressions. Over millions of years the sediments were compressed into sedimentary rocks such as sandstone and li ...
... between Earth movements during which sedimentary rocks, thousands of metres thick, formed in huge depressions called geosynclines. 2) Rivers carried sediments and deposited them into the depressions. Over millions of years the sediments were compressed into sedimentary rocks such as sandstone and li ...
Reading: Inside Earth
... that is hotter and under increasing pressure. In general, temperature and pressure in the mantle increase with depth. The heat and pressure make the part of the mantle just beneath the lithosphere less rigid than the rock above. Like road tar softened by the heat of the sun, the material that forms ...
... that is hotter and under increasing pressure. In general, temperature and pressure in the mantle increase with depth. The heat and pressure make the part of the mantle just beneath the lithosphere less rigid than the rock above. Like road tar softened by the heat of the sun, the material that forms ...
Chapter6summary.doc
... o Exception to above: pegmatite dikes, cool quickly but are water-rich so atoms can move around fast enough to form very large crystal structures igneous rocks form at volcanic arcs, a result of subduction o continental volcanic arcs – ex: Andes mtns o oceanic volcanic island arcs – ex:Aleutians o ...
... o Exception to above: pegmatite dikes, cool quickly but are water-rich so atoms can move around fast enough to form very large crystal structures igneous rocks form at volcanic arcs, a result of subduction o continental volcanic arcs – ex: Andes mtns o oceanic volcanic island arcs – ex:Aleutians o ...
Plates
... C. Plates – pieces of Earth’s crust 1. Sit on top of Mantle 2. Oceanic vs. Continental plates/crust a. Oceanic crust is very thin b. Continental crust is thick c. When two type of crust meet: Oceanic crust subducts under continental crust ...
... C. Plates – pieces of Earth’s crust 1. Sit on top of Mantle 2. Oceanic vs. Continental plates/crust a. Oceanic crust is very thin b. Continental crust is thick c. When two type of crust meet: Oceanic crust subducts under continental crust ...
Scotland`s Time Lords
... Hutton also had a keen interest in agriculture and farmed at Slighhouses and Nether Monynut in Berwickshire, farms he had inherited from his father. Hutton wished to apply his scientific understanding to agricultural practice and travelled extensively to gain new ideas, introducing the Suffolk plou ...
... Hutton also had a keen interest in agriculture and farmed at Slighhouses and Nether Monynut in Berwickshire, farms he had inherited from his father. Hutton wished to apply his scientific understanding to agricultural practice and travelled extensively to gain new ideas, introducing the Suffolk plou ...
WG3200 Unit 1 - Chapter 1 File
... – The plates of the earth are not composed of just land; they're composed of ocean, too. In some cases, the plates are just land, in others they're just ocean, and, in still other cases, they consist of land and ocean. They each have different boundaries and move in all different directions. ...
... – The plates of the earth are not composed of just land; they're composed of ocean, too. In some cases, the plates are just land, in others they're just ocean, and, in still other cases, they consist of land and ocean. They each have different boundaries and move in all different directions. ...
Plate Tectonics - Bakersfield College
... Earth’s magnetic field reverses polarity at irregular intervals ...
... Earth’s magnetic field reverses polarity at irregular intervals ...
Petrogenesis of Bir Madi Gabbro-Diorite and Tonalite
... mantle-derived magmas, initial island arcs and micro-continents during the 950-550 Ma Pan-African event (Vail, 1983). It thus, represents juvenile arc development by subduction-related accretion in an oceanic environment (Stern, 1994). The occurrence of ophiolitic sutures and their association with ...
... mantle-derived magmas, initial island arcs and micro-continents during the 950-550 Ma Pan-African event (Vail, 1983). It thus, represents juvenile arc development by subduction-related accretion in an oceanic environment (Stern, 1994). The occurrence of ophiolitic sutures and their association with ...
Chapter 23 The Geology of the Mesozoic Era
... In Montana the sequence is similar. Above the marine Pierre Shale (ammonites) and Claggett Sandstone (nearshore and beach) is the Late Cretaceous Judith River Fm. containing dinosaur bones and conifers in stream deposits. Is this sequence a transgression or a regression? ...
... In Montana the sequence is similar. Above the marine Pierre Shale (ammonites) and Claggett Sandstone (nearshore and beach) is the Late Cretaceous Judith River Fm. containing dinosaur bones and conifers in stream deposits. Is this sequence a transgression or a regression? ...
Chapter 2 Landforms Geological History of California California`s
... • fungus gives the tree water and mineral nutrients like nitrogen and phosphorus • the mushroom hyphae are far finer in diameter than tree roots and can thus extract more water and nutrients from the ...
... • fungus gives the tree water and mineral nutrients like nitrogen and phosphorus • the mushroom hyphae are far finer in diameter than tree roots and can thus extract more water and nutrients from the ...
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.