Ch 17 Plate Tectonics
... 1. Early mapmakers noted that the ___________________of continents appeared to ______________ like a ________________________. a. Gondwanaland: Thought _________________ continents were joined as a ____________ landmass at one time 2. Alfred Wegener proposed hypothesis of ___________________________ ...
... 1. Early mapmakers noted that the ___________________of continents appeared to ______________ like a ________________________. a. Gondwanaland: Thought _________________ continents were joined as a ____________ landmass at one time 2. Alfred Wegener proposed hypothesis of ___________________________ ...
CHAPTER 23 - CONNECTING THE OCEANS AND HUMAN HEALTH
... underscoring the vast potential of the oceans as a source of new chemicals.3 These natural products can be developed not only as pharmaceuticals, but also as nutritional supplements, medical diagnostics, cosmetics, agricultural chemicals (pesticides and herbicides), enzymes and chemical probes for d ...
... underscoring the vast potential of the oceans as a source of new chemicals.3 These natural products can be developed not only as pharmaceuticals, but also as nutritional supplements, medical diagnostics, cosmetics, agricultural chemicals (pesticides and herbicides), enzymes and chemical probes for d ...
Ocean Exploration - Division on Earth and Life Studies
... between the ocean’s surface and the seafloor—may be the least explored, even though it contains more living things than all of Earth’s rainforests combined. Similarly, the ocean floor and sediments encompass an extensive microbial biosphere that may rival that on the continents, which is not yet und ...
... between the ocean’s surface and the seafloor—may be the least explored, even though it contains more living things than all of Earth’s rainforests combined. Similarly, the ocean floor and sediments encompass an extensive microbial biosphere that may rival that on the continents, which is not yet und ...
FINAL Review activity
... all factors (biological, chemical, geologic, and physical) that affect species diversity, biomass, and the distribution of life in the ocean. 10. Detail the electromagnetic spectrum for visible light and explain the relationship between wavelength and energy. Discuss the implications of this relatio ...
... all factors (biological, chemical, geologic, and physical) that affect species diversity, biomass, and the distribution of life in the ocean. 10. Detail the electromagnetic spectrum for visible light and explain the relationship between wavelength and energy. Discuss the implications of this relatio ...
Oceanography
... is why many different kinds of resources can be found there, such as petroleum and natural gas deposits. Approximately 20 percent of the world’s oil comes from under the seabed. To extract these substances, wells are drilled into the seafloor from floating vessels and fixed platforms. Other deposits ...
... is why many different kinds of resources can be found there, such as petroleum and natural gas deposits. Approximately 20 percent of the world’s oil comes from under the seabed. To extract these substances, wells are drilled into the seafloor from floating vessels and fixed platforms. Other deposits ...
Future of the Ocean and its Seas: a non
... Oceans, there is but one global ocean: a single, interconnected body of seawater that all people and living things share, and depend on. In the same way that we recognise that the Earth has only one atmosphere, delivering worldwide weather and operating as a single dynamic system, any political boun ...
... Oceans, there is but one global ocean: a single, interconnected body of seawater that all people and living things share, and depend on. In the same way that we recognise that the Earth has only one atmosphere, delivering worldwide weather and operating as a single dynamic system, any political boun ...
Plate Tectonics and Continental Drift
... • Plates are active participants in the convection process – Slab pull – dense ocean crust descends under its own weight – Ridge push – gravity pulls lithosphere down & away from ridge – Friction – resistance to movement from various sources ...
... • Plates are active participants in the convection process – Slab pull – dense ocean crust descends under its own weight – Ridge push – gravity pulls lithosphere down & away from ridge – Friction – resistance to movement from various sources ...
Earth Structure
... Physical Features of the Seafloor • Continental Shelf – part of the continent that extends into ocean about 200km and is really part of the continent even though it is under water. • Continental Slope – the steep slope at edge of the continental shelf that ...
... Physical Features of the Seafloor • Continental Shelf – part of the continent that extends into ocean about 200km and is really part of the continent even though it is under water. • Continental Slope – the steep slope at edge of the continental shelf that ...
presentation_06 - International Pacific Research Center
... http://iprc.soest.hawaii.edu/news/marine_and_tsunami_debris/debris_news.php (hint google IPRC tsunami debris) or email: marinedebris@soest.hawaii.edu ...
... http://iprc.soest.hawaii.edu/news/marine_and_tsunami_debris/debris_news.php (hint google IPRC tsunami debris) or email: marinedebris@soest.hawaii.edu ...
Plastic Pollution in Marine System
... http://iprc.soest.hawaii.edu/news/marine_and_tsunami_debris/debris_news.php ...
... http://iprc.soest.hawaii.edu/news/marine_and_tsunami_debris/debris_news.php ...
Scientific Ocean Drilling - Division on Earth and Life Studies
... sample and collect ocean cores. Discoveries made over the last four decades have provided important insights into plate tectonics, changes in the Earth’s magnetic field, the structure and function of oceanic crust and upper mantle, and the processes that generate major earthquakes and tsunamis. Dril ...
... sample and collect ocean cores. Discoveries made over the last four decades have provided important insights into plate tectonics, changes in the Earth’s magnetic field, the structure and function of oceanic crust and upper mantle, and the processes that generate major earthquakes and tsunamis. Dril ...
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 ...
LETTER hJ3C of organic carbon in the Bengal Fan
... (SUBRAMANIAN and ITTEKKOT , 199 1). Although the Bengal Fan records only refractory POC from the G-B river system, it is likely that DOC and labile POC were isotopically similar (In the Amazon, e.g., 6’3Cnoc - 6’3Cpoc usually 12%0, QUAY et al., 1992). Because the G-B river system is such an importan ...
... (SUBRAMANIAN and ITTEKKOT , 199 1). Although the Bengal Fan records only refractory POC from the G-B river system, it is likely that DOC and labile POC were isotopically similar (In the Amazon, e.g., 6’3Cnoc - 6’3Cpoc usually 12%0, QUAY et al., 1992). Because the G-B river system is such an importan ...
Sea-Floor Spreading
... objects and then records the echoes of these sound waves. The time it takes for the echo to arrive indicates the distance to the object. ...
... objects and then records the echoes of these sound waves. The time it takes for the echo to arrive indicates the distance to the object. ...
Can Flood Geology Explain Thick Chalk Layers.indd
... carbonate per year from the top 100 m (305 feet) of the ocean. At this rate it is possible to produce an average 100 m (305 feet) thickness of coccoliths as calcareous ooze on the ocean floor in less than 200 years. Again, other factors could be brought into the calculations to either lengthen or sho ...
... carbonate per year from the top 100 m (305 feet) of the ocean. At this rate it is possible to produce an average 100 m (305 feet) thickness of coccoliths as calcareous ooze on the ocean floor in less than 200 years. Again, other factors could be brought into the calculations to either lengthen or sho ...
Plate tectonic phenomena in the Southern Poland and adjacent areas
... Wegener’s continental drift theory. Plate tectonic theory assumes that outermost part of the Earth, so called the lithosphere, is built of two different types of plates which are in constant motion. The continental type plates are 30 to 80 km thick and are built of light, acidic rocks. On the other ...
... Wegener’s continental drift theory. Plate tectonic theory assumes that outermost part of the Earth, so called the lithosphere, is built of two different types of plates which are in constant motion. The continental type plates are 30 to 80 km thick and are built of light, acidic rocks. On the other ...
draft-draft-draft - 2017 AGU Fall Meeting
... Other aspects of the Paris Agreement suggest that there could be meaningful developments in specific arenas such as ocean protection. Scripps researchers note that marine ecosystems stand to experience profound impacts even under the most ambitious mitigation scenarios, but that they are at least re ...
... Other aspects of the Paris Agreement suggest that there could be meaningful developments in specific arenas such as ocean protection. Scripps researchers note that marine ecosystems stand to experience profound impacts even under the most ambitious mitigation scenarios, but that they are at least re ...
Chap-4-Sec-2-Evidence-Supporting-Continental
... refers to large rigid blocks of the Earth's surface which appear to move as a unit. These plates may include both oceans and continents. When the plates move, the continents and ocean floor above them move as well. Continential Drift occurs when the continents change position in relation to each oth ...
... refers to large rigid blocks of the Earth's surface which appear to move as a unit. These plates may include both oceans and continents. When the plates move, the continents and ocean floor above them move as well. Continential Drift occurs when the continents change position in relation to each oth ...
1 plate tectonics - IES Gabriela Mistral
... Seafloor spreading is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge. As the time passes, the ocean floor spreads and extends. WHILE OCEANIC LITHOSPHERE IS CONSTANTLY BEING FORMED AT THE RIDGES, IT I ...
... Seafloor spreading is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge. As the time passes, the ocean floor spreads and extends. WHILE OCEANIC LITHOSPHERE IS CONSTANTLY BEING FORMED AT THE RIDGES, IT I ...
Marine Radiocarbon Evidence for the Mechanism of Deglacial
... linked to a massive discharge of glacial ice and fresh water to the North Atlantic known as Heinrich event 1. Following a recovery during the Bølling-Allerød warm phase, another marked weakening of NADW/GNAIW is documented during the Younger Dryas cold period, most likely also triggered by a dischar ...
... linked to a massive discharge of glacial ice and fresh water to the North Atlantic known as Heinrich event 1. Following a recovery during the Bølling-Allerød warm phase, another marked weakening of NADW/GNAIW is documented during the Younger Dryas cold period, most likely also triggered by a dischar ...
chapt01_lecture
... expanses of ocean at the ocean’s surface only. Sonar – used to map seafloor depths and formations. Scuba – used for direct human exploration of oceanic environment for longer periods and at deeper depths than would otherwise be available to man. Remotely operated vehicles (ROV’s) – allows for direct ...
... expanses of ocean at the ocean’s surface only. Sonar – used to map seafloor depths and formations. Scuba – used for direct human exploration of oceanic environment for longer periods and at deeper depths than would otherwise be available to man. Remotely operated vehicles (ROV’s) – allows for direct ...
10.1016/j.apgeog.2014.11.027
... cooperation of the affected parties (Higgs et al., 2008; Pomeroy & Douvere, 2008). Stakeholders such as fishermen, shippers, and scientists all have critical interests in ocean space use and possess local and traditional knowledge about use patterns that must be integrated into MSP (Kliskey, Alessa, ...
... cooperation of the affected parties (Higgs et al., 2008; Pomeroy & Douvere, 2008). Stakeholders such as fishermen, shippers, and scientists all have critical interests in ocean space use and possess local and traditional knowledge about use patterns that must be integrated into MSP (Kliskey, Alessa, ...
slides_04 - International Pacific Research Center
... http://iprc.soest.hawaii.edu/news/marine_and_tsunami_debris/debris_news.php (hint google IPRC tsunami debris) or email: marinedebris@soest.hawaii.edu ...
... http://iprc.soest.hawaii.edu/news/marine_and_tsunami_debris/debris_news.php (hint google IPRC tsunami debris) or email: marinedebris@soest.hawaii.edu ...
Fig. 1
... forced down into the mantle beneath the other plate. These zones of subduction are visible on the seafloor as deep ocean trenches. They are seismically active areas characterized by shallow-, intermediate-, and deep-focus earthquakes (deep earthquakes are possible here because of the cold, brittle l ...
... forced down into the mantle beneath the other plate. These zones of subduction are visible on the seafloor as deep ocean trenches. They are seismically active areas characterized by shallow-, intermediate-, and deep-focus earthquakes (deep earthquakes are possible here because of the cold, brittle l ...
Ocean acidification
Ocean acidification is the ongoing decrease in the pH of the Earth's oceans, caused by the uptake of carbon dioxide (CO2) from the atmosphere. An estimated 30–40% of the carbon dioxide from human activity released into the atmosphere dissolves into oceans, rivers and lakes. To achieve chemical equilibrium, some of it reacts with the water to form carbonic acid. Some of these extra carbonic acid molecules react with a water molecule to give a bicarbonate ion and a hydronium ion, thus increasing ocean acidity (H+ ion concentration). Between 1751 and 1994 surface ocean pH is estimated to have decreased from approximately 8.25 to 8.14, representing an increase of almost 30% in H+ ion concentration in the world's oceans. Since current and projected ocean pH levels are above 7.0, the oceans are technically alkaline now and will remain so; referring to this effect as ""decreasing ocean alkalinity"" would be equally correct if less politically useful. Earth System Models project that within the last decade ocean acidity exceeded historical analogs and in combination with other ocean biogeochemical changes could undermine the functioning of marine ecosystems and disrupt the provision of many goods and services associated with the ocean.Increasing acidity is thought to have a range of possibly harmful consequences, such as depressing metabolic rates and immune responses in some organisms, and causing coral bleaching. This also causes decreasing oxygen levels as it kills off algae.Other chemical reactions are triggered which result in a net decrease in the amount of carbonate ions available. This makes it more difficult for marine calcifying organisms, such as coral and some plankton, to form biogenic calcium carbonate, and such structures become vulnerable to dissolution. Ongoing acidification of the oceans threatens food chains connected with the oceans. As members of the InterAcademy Panel, 105 science academies have issued a statement on ocean acidification recommending that by 2050, global CO2 emissions be reduced by at least 50% compared to the 1990 level.Ocean acidification has been called the ""evil twin of global warming"" and ""the other CO2 problem"".Ocean acidification has occurred previously in Earth's history. The most notable example is the Paleocene-Eocene Thermal Maximum (PETM), which occurred approximately 56 million years ago. For reasons that are currently uncertain, massive amounts of carbon entered the ocean and atmosphere, and led to the dissolution of carbonate sediments in all ocean basins.