Lamarque_Arlita_SKS_RF_GJI_201
... age of the upper mantle deformation beneath this area. 2 GEOLOGICAL SETTING A general description of the region was made by Stillwell (1918), and more recently by Ménot et al. (2007). The TAC is divided into two domains: the Palaeoproterozoic metasedimentary basins and the Neoarchean basement (Fig. ...
... age of the upper mantle deformation beneath this area. 2 GEOLOGICAL SETTING A general description of the region was made by Stillwell (1918), and more recently by Ménot et al. (2007). The TAC is divided into two domains: the Palaeoproterozoic metasedimentary basins and the Neoarchean basement (Fig. ...
The transition from diffuse to focused extension: Modeled evolution
... western Ross Sea, suggesting that this sea floor spreading was accompanied by continental extension in the western region of the Ross Sea. The timing of extension in the Adare trough compares well with results of the Cape Roberts Drilling Project, where seismic and core data suggest that much of the ...
... western Ross Sea, suggesting that this sea floor spreading was accompanied by continental extension in the western region of the Ross Sea. The timing of extension in the Adare trough compares well with results of the Cape Roberts Drilling Project, where seismic and core data suggest that much of the ...
Upper Mantle Seismic Anisotropy Beneath the West Antarctic Rift
... extension direction, a result unlike reports from the East African rift system and rifts within the Basin and Range, which show much greater variation. We contend that ductile shearing rather than magmatic intrusion may have been the controlling mechanism for accumulation and retention of such coher ...
... extension direction, a result unlike reports from the East African rift system and rifts within the Basin and Range, which show much greater variation. We contend that ductile shearing rather than magmatic intrusion may have been the controlling mechanism for accumulation and retention of such coher ...
Antarctica Plate Motion - Indian National Science Academy
... GPS Measurements and Analysis We analysed the data from Maitri station (MAIT) along with forty seven other GPS stations from UNAVCO (University NAVSTAR Consortium) and SOPAC (Scripps Orbit and Permanent Array Center). ...
... GPS Measurements and Analysis We analysed the data from Maitri station (MAIT) along with forty seven other GPS stations from UNAVCO (University NAVSTAR Consortium) and SOPAC (Scripps Orbit and Permanent Array Center). ...
Thermocronology Age Determinations, Using Apatites and Zircons
... have FT ages which scatter between 16 and 20 Ma, with a concordant mean and standard error of 18.7 ± 1.2 Ma (Sell et al., 2000). The confined track length distributions show that the track record starts about 40 – 35 Ma ago. The cooling of rocks, down to 120 ºC, seems to have accelerated from Early ...
... have FT ages which scatter between 16 and 20 Ma, with a concordant mean and standard error of 18.7 ± 1.2 Ma (Sell et al., 2000). The confined track length distributions show that the track record starts about 40 – 35 Ma ago. The cooling of rocks, down to 120 ºC, seems to have accelerated from Early ...
Race to the End of the Earth: Activities for Grades 6-8
... In this hall students can explore the geography of North America. Have each student choose each one of the following dioramas to focus on: the mountain goat, Alaskan brown bear, musk ox, white sheep, Grant caribou, or bighorn sheep. Have them explore the geographic landscapes shown in the dioramas a ...
... In this hall students can explore the geography of North America. Have each student choose each one of the following dioramas to focus on: the mountain goat, Alaskan brown bear, musk ox, white sheep, Grant caribou, or bighorn sheep. Have them explore the geographic landscapes shown in the dioramas a ...
Word - LEARNZ
... Laurasia drifted north and divided into Europe, Asia and North America. Gondwanaland became Antarctica, Africa, South America, India, Australia and New Zealand. Although most of these latter land masses stayed in the southern hemisphere, one of them did not. India moved north, eventually colliding w ...
... Laurasia drifted north and divided into Europe, Asia and North America. Gondwanaland became Antarctica, Africa, South America, India, Australia and New Zealand. Although most of these latter land masses stayed in the southern hemisphere, one of them did not. India moved north, eventually colliding w ...
the antarctic ecosystem - Deep Blue
... useful delimitation to identify the Antarctic ecosystem is the area within the Antarctic Convergence, the zone in the Southern Ocean where Antarctic upper water sinks below and mixes with warmer sub-Antarctic surface water (Phillpot, 1985; E1-Sayed, 1985). The Convergence, generally between 50 ° and ...
... useful delimitation to identify the Antarctic ecosystem is the area within the Antarctic Convergence, the zone in the Southern Ocean where Antarctic upper water sinks below and mixes with warmer sub-Antarctic surface water (Phillpot, 1985; E1-Sayed, 1985). The Convergence, generally between 50 ° and ...
6. geology - Discovering Antarctica
... a period of 150 million years or so. Africa and South America split to form the South Atlantic, and India moved north as the Indian Ocean opened, eventually colliding with Asia. The result of this collision was massive buckling of the crust which produced the Himalayas. Different parts of Gondwana s ...
... a period of 150 million years or so. Africa and South America split to form the South Atlantic, and India moved north as the Indian Ocean opened, eventually colliding with Asia. The result of this collision was massive buckling of the crust which produced the Himalayas. Different parts of Gondwana s ...
Chapter 14: The Paleogene
... in organic matter on continental shelves o A drastic cooling during the Middle to Late Eocene plunged Earth;s temperature by as much as 10 in a little as 15 million years; this probably resulted from the initial movement of Antarctica over the South Pole after it had rifted away from Australia © 20 ...
... in organic matter on continental shelves o A drastic cooling during the Middle to Late Eocene plunged Earth;s temperature by as much as 10 in a little as 15 million years; this probably resulted from the initial movement of Antarctica over the South Pole after it had rifted away from Australia © 20 ...
Word - LEARNZ
... matter that are covered with silica-rich water become petrified--they turn into solid mineral. All of these methods result in what we know as fossils. A palaeontologist is a scientist who studies fossils to find out more about extinct species or about any species that are evident in the fossil recor ...
... matter that are covered with silica-rich water become petrified--they turn into solid mineral. All of these methods result in what we know as fossils. A palaeontologist is a scientist who studies fossils to find out more about extinct species or about any species that are evident in the fossil recor ...
The evolution of circum-Antarctic oceanic crust since cretaceous
... Gondwanaland break-up together with ongoing changes of the South Pacific tectonic regime led to the opening of new oceanic domains around Antarctica since Late Jurassic. On a geological timescale first-order changes in palaeo-climate, palaeo-oceanography and marine sedimentation are controlled by pl ...
... Gondwanaland break-up together with ongoing changes of the South Pacific tectonic regime led to the opening of new oceanic domains around Antarctica since Late Jurassic. On a geological timescale first-order changes in palaeo-climate, palaeo-oceanography and marine sedimentation are controlled by pl ...
5 Themes of Geography - Maryville City Schools / Homepage
... live in Hawaii. Hawaii has lush mountains as well as beautiful beaches. And the people there seem to be so laid back and have less worries. • Place ...
... live in Hawaii. Hawaii has lush mountains as well as beautiful beaches. And the people there seem to be so laid back and have less worries. • Place ...
Modifying Text Complexity Tools
... the Earth’s crust and mantle. Global sea levels dropped over 330 feet (100 meters) to expose continental shelves in some areas. This caused land bridges to be formed between land masses and allowed animals to migrate. ...
... the Earth’s crust and mantle. Global sea levels dropped over 330 feet (100 meters) to expose continental shelves in some areas. This caused land bridges to be formed between land masses and allowed animals to migrate. ...
Putting Antarctica on the Map
... Although Antarctica is certainly "of this world," it's so distant and alien that some students may perceive it as "out of this world!" There are many misconceptions and much misinformation about this remote, frozen continent. The main purpose of this Opening Activity is to begin a process of discove ...
... Although Antarctica is certainly "of this world," it's so distant and alien that some students may perceive it as "out of this world!" There are many misconceptions and much misinformation about this remote, frozen continent. The main purpose of this Opening Activity is to begin a process of discove ...
Introduction to Antarctica, Why is it so Cold
... of the angle as you see in the chart below SIN 80 = 0.98 or 98% SIN 70 = 0.94 or 94% SIN 60 = 0.87 or 87% SIN 50 = 0.77 or 77% SIN 40 = 0.64 or 64% SIN 30 = 0.50 or 50% SIN 20 = 0.34 or 34% SIN 10 = 0.17 or 17% SIN 0 = 0.00 or 0% Translate: If the angle of the sun is 80o then that region receives 98 ...
... of the angle as you see in the chart below SIN 80 = 0.98 or 98% SIN 70 = 0.94 or 94% SIN 60 = 0.87 or 87% SIN 50 = 0.77 or 77% SIN 40 = 0.64 or 64% SIN 30 = 0.50 or 50% SIN 20 = 0.34 or 34% SIN 10 = 0.17 or 17% SIN 0 = 0.00 or 0% Translate: If the angle of the sun is 80o then that region receives 98 ...
Frozen in Time. Prehistoric life in Antarctica.
... Late Cretaceous are also discussed in this chapter. For the invertebrate species, readers will be impressed by spectacular Cretaceous ammonites generally reaching considerable sizes, including uncoiled heteromorph species. Mass extinction at the end of the Cretaceous Period is discussed in a separat ...
... Late Cretaceous are also discussed in this chapter. For the invertebrate species, readers will be impressed by spectacular Cretaceous ammonites generally reaching considerable sizes, including uncoiled heteromorph species. Mass extinction at the end of the Cretaceous Period is discussed in a separat ...
Plate Tectonics - Introduction and Evidence of Movement
... Since there are Lystrosaurus fossils (found where it is warm) in Antarctica (very cold climate) o Antarctica used to be in a different location and closer to the equator ...
... Since there are Lystrosaurus fossils (found where it is warm) in Antarctica (very cold climate) o Antarctica used to be in a different location and closer to the equator ...
On the move - Discovering Antarctica
... Each picture below shows a stage in the break-up of the super-continent, Gondwana that began 180 million years ago. Use what you already know to add captions to the pictures to describe what is happening. If you are a bit stuck on what to write, you could use these captions to get started. 'India an ...
... Each picture below shows a stage in the break-up of the super-continent, Gondwana that began 180 million years ago. Use what you already know to add captions to the pictures to describe what is happening. If you are a bit stuck on what to write, you could use these captions to get started. 'India an ...
Continental Drift Theory
... Continental Drift Theory • First proposed by Alfred Wegener in 1912: – 250 million years ago, all of the continents were combined into one super-continent called “Pangaea” – The continents gradually drifted apart to where they are today ...
... Continental Drift Theory • First proposed by Alfred Wegener in 1912: – 250 million years ago, all of the continents were combined into one super-continent called “Pangaea” – The continents gradually drifted apart to where they are today ...
Gondwana The Earth is really an ocean planet since less than one
... Gondwana The Earth is really an ocean planet since less than one third of the Earth’s surface is covered by land and over two thirds covered by water. The land mass consists of continents and islands which are grouped together into seven regions - North America, South America, Asia, Africa, Antarcti ...
... Gondwana The Earth is really an ocean planet since less than one third of the Earth’s surface is covered by land and over two thirds covered by water. The land mass consists of continents and islands which are grouped together into seven regions - North America, South America, Asia, Africa, Antarcti ...
SPQ Module 4 – Very Cold Dinosaurs
... It might help Ray, Richard and Kevin beat the speed record to the South Pole if they were pursued by a 25 foot carnivorous dinosaur. Although this seems like a crazy idea, it is not as crazy as one might think. The story starts in 1912 with a man in Germany named Alfred Wegener (1880 – 1930) who mad ...
... It might help Ray, Richard and Kevin beat the speed record to the South Pole if they were pursued by a 25 foot carnivorous dinosaur. Although this seems like a crazy idea, it is not as crazy as one might think. The story starts in 1912 with a man in Germany named Alfred Wegener (1880 – 1930) who mad ...
Antarctica
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Antarctica (/æntˈɑrktɪkə/ or /æntˈɑrtɪkə/) is Earth's southernmost continent, containing the geographic South Pole. It is situated in the Antarctic region of the Southern Hemisphere, almost entirely south of the Antarctic Circle, and is surrounded by the Southern Ocean. At 14.0 million square kilometres (5.4 million square miles), it is the fifth-largest continent in area after Asia, Africa, North America, and South America. For comparison, Antarctica is nearly twice the size of Australia. About 98% of Antarctica is covered by ice that averages 1.9 kilometres (1.2 mi) in thickness, which extends to all but the northernmost reaches of the Antarctic Peninsula.Antarctica, on average, is the coldest, driest, and windiest continent, and has the highest average elevation of all the continents. Antarctica is considered a desert, with annual precipitation of only 200 mm (8 in) along the coast and far less inland. The temperature in Antarctica has reached −89 °C (−129 °F), though the average for the third quarter (the coldest part of the year) is −63 °C (−81 °F). There are no permanent human residents, but anywhere from 1,000 to 5,000 people reside throughout the year at the research stations scattered across the continent. Organisms native to Antarctica include many types of algae, bacteria, fungi, plants, protista, and certain animals, such as mites, nematodes, penguins, seals and tardigrades. Vegetation, where it occurs, is tundra.Although myths and speculation about a Terra Australis (""Southern Land"") date back to antiquity, the Russian expedition of Fabian Gottlieb von Bellingshausen and Mikhail Lazarev on Vostok and Mirny first sighted a continental ice shelf in 1820. The continent, however, remained largely neglected for the rest of the 19th century because of its hostile environment, lack of resources, and isolation.Antarctica is a de facto condominium, governed by parties to the Antarctic Treaty System that have consulting status. Twelve countries signed the Antarctic Treaty in 1959, and thirty-eight have signed it since then. The treaty prohibits military activities and mineral mining, prohibits nuclear explosions and nuclear waste disposal, supports scientific research, and protects the continent's ecozone. Ongoing experiments are conducted by more than 4,000 scientists from many nations.