Accurate focal depth determination of oceanic earthquakes using
... being due to depth-dependent stress and strain. Numerical modeling also suggests that the stress field within the lithosphere varies systematically and significantly with depth. The upper and the lower competent lithosphere are in horizontal deviatoric compression and tension, respectively (Parmentier ...
... being due to depth-dependent stress and strain. Numerical modeling also suggests that the stress field within the lithosphere varies systematically and significantly with depth. The upper and the lower competent lithosphere are in horizontal deviatoric compression and tension, respectively (Parmentier ...
Plate Tectonics
... Fossils on different continents are similar to fossils on continents that were once connected. When the continents split, different life forms developed. Continents that were once connected also have identical landform shapes and features and identical rock formations ...
... Fossils on different continents are similar to fossils on continents that were once connected. When the continents split, different life forms developed. Continents that were once connected also have identical landform shapes and features and identical rock formations ...
9-26 Review SFS and CD.notebook
... Other fossil examples include the fresh water reptiles Mesosaurus and Lystrosaurus. These fossils were found in areas that are now separated by oceans and neither could have swum great distances across salt water. Wegener inferred that these reptiles had to have lived on one large land mass. ...
... Other fossil examples include the fresh water reptiles Mesosaurus and Lystrosaurus. These fossils were found in areas that are now separated by oceans and neither could have swum great distances across salt water. Wegener inferred that these reptiles had to have lived on one large land mass. ...
Plate Tectonics
... layer • Known as the lithosphere • Consists of uppermost mantle and overlying crust • Overlies a weaker region in the mantle called the asthenosphere ...
... layer • Known as the lithosphere • Consists of uppermost mantle and overlying crust • Overlies a weaker region in the mantle called the asthenosphere ...
Plate Tectonics - John Bowne High School
... In places where the magnetic data were reversed in relation to Earth’s present magnetic field, a lowerthan-normal reading (–) was recorded. ...
... In places where the magnetic data were reversed in relation to Earth’s present magnetic field, a lowerthan-normal reading (–) was recorded. ...
Sea-floor spreading and deformation processes in the South Atlantic
... in detail at the complex tectono-magmatic processes involved in the opening of the South Atlantic Ocean. This improvement in resolution has been achieved by innovative research and development funded by an oil industry consortium study conducted by the Leeds University spin-off company GETECH [1-3]. ...
... in detail at the complex tectono-magmatic processes involved in the opening of the South Atlantic Ocean. This improvement in resolution has been achieved by innovative research and development funded by an oil industry consortium study conducted by the Leeds University spin-off company GETECH [1-3]. ...
Plate Boundaries Activity Worksheet
... rising convection current below lifts the lithosphere producing a mid-ocean ridge. Extreme forces stretch the lithosphere and produce a deep fissure. When the fissure opens, pressure is reduced on the super-heated mantle material below. It responds by melting and the new magma flows into the fissure ...
... rising convection current below lifts the lithosphere producing a mid-ocean ridge. Extreme forces stretch the lithosphere and produce a deep fissure. When the fissure opens, pressure is reduced on the super-heated mantle material below. It responds by melting and the new magma flows into the fissure ...
divergent boundary
... • The Earth’s crust is divided into 12 major plates which are moved in various directions. • This plate motion causes them to collide, pull apart, or scrape against each other. • Each type of interaction causes a characteristic set of Earth structures or “tectonic” features like mountain ranges, vol ...
... • The Earth’s crust is divided into 12 major plates which are moved in various directions. • This plate motion causes them to collide, pull apart, or scrape against each other. • Each type of interaction causes a characteristic set of Earth structures or “tectonic” features like mountain ranges, vol ...
ángeles garcía pardo
... The dynamics of the seabed, Miquel Canals The deep seabed is far from being the calm place that research pioneers thought. Instead, both natural processes and human activities episodically disturb it. Recent studies have shown that dense shelf water cascading, open ocean deep convection and major st ...
... The dynamics of the seabed, Miquel Canals The deep seabed is far from being the calm place that research pioneers thought. Instead, both natural processes and human activities episodically disturb it. Recent studies have shown that dense shelf water cascading, open ocean deep convection and major st ...
ppt link
... Plate tectonics Convergent Movement Convergent plate boundaries have the following characteristics: 1. plate motion is toward plate boundary, 2. oceanic lithosphere sinks back into Earth and is recycled, 3. the volcanic arc is region of highly explosive volcanoes, like Mt. St. Helens and Mt. Rainer ...
... Plate tectonics Convergent Movement Convergent plate boundaries have the following characteristics: 1. plate motion is toward plate boundary, 2. oceanic lithosphere sinks back into Earth and is recycled, 3. the volcanic arc is region of highly explosive volcanoes, like Mt. St. Helens and Mt. Rainer ...
![RV_Samudrika_OCD[1]](http://s1.studyres.com/store/data/019950756_1-abf3b9e7498144e690d3670214c9ddb0-300x300.png)
RV_Samudrika_OCD[1]
... been reflected off the seafloor. The system uses this reflected energy to provide information on sediment layers beneath the sediment-water interface. Capabilities Sub-bottom profiling systems useful for characterizing benthic habitats, since they provide information about sub-surface sediment struc ...
... been reflected off the seafloor. The system uses this reflected energy to provide information on sediment layers beneath the sediment-water interface. Capabilities Sub-bottom profiling systems useful for characterizing benthic habitats, since they provide information about sub-surface sediment struc ...
Crust
... • When two oceanic plates collide, one runs over the other which causes it to sink into the mantle forming a subduction zone. • The subducting plate is bent downward to form a very deep depression in the ocean floor called a trench. • The worlds deepest parts of the ocean are found along trenches. – ...
... • When two oceanic plates collide, one runs over the other which causes it to sink into the mantle forming a subduction zone. • The subducting plate is bent downward to form a very deep depression in the ocean floor called a trench. • The worlds deepest parts of the ocean are found along trenches. – ...
Play-Doh Plates
... mafic-composition magma, producing a basalt when it extrudes during volcanic eruptions. For oc-cont, the magma produced from the melting of hot, hydrated rocks produces a mafic-composition magma. But the pieces of the granite (felsic)-composition continental crust fall into the rising magma as the ...
... mafic-composition magma, producing a basalt when it extrudes during volcanic eruptions. For oc-cont, the magma produced from the melting of hot, hydrated rocks produces a mafic-composition magma. But the pieces of the granite (felsic)-composition continental crust fall into the rising magma as the ...
ALABAMA COURSE OF STUDY SIXTH GRADE SCIENCE
... than continental crust (mostly granite). The continental shelf is the part of the continent that is covered by ocean and usually slopes gently (about 0.12 m every 100 m). The continental slope is the steep slope on the seaward edge of a continental shelf. The boundary between the continental crust a ...
... than continental crust (mostly granite). The continental shelf is the part of the continent that is covered by ocean and usually slopes gently (about 0.12 m every 100 m). The continental slope is the steep slope on the seaward edge of a continental shelf. The boundary between the continental crust a ...
Draft minutes from the 1518th (Mar. 29)
... Titan possesses high amounts of organic aerosol particles in the atmosphere, which creates abundant smog. Dr. Anderson explained that these aerosol particles are important for nucleation sites for organic ice clouds, which form successive ice layers as particles descend in the atmosphere. Abundances ...
... Titan possesses high amounts of organic aerosol particles in the atmosphere, which creates abundant smog. Dr. Anderson explained that these aerosol particles are important for nucleation sites for organic ice clouds, which form successive ice layers as particles descend in the atmosphere. Abundances ...
Prescott`s Microbiology, 9th Edition 30 Microorganisms in Marine
... D. Microorganisms in the open ocean 1. The open ocean regions (pelagic) account for half of the world's photosynthesis; it is an oligotrophic environment (very low nutrient levels) that supports a diverse microbial community 2. Organic matter found in the photic zone (upper 200–300 meters) where lig ...
... D. Microorganisms in the open ocean 1. The open ocean regions (pelagic) account for half of the world's photosynthesis; it is an oligotrophic environment (very low nutrient levels) that supports a diverse microbial community 2. Organic matter found in the photic zone (upper 200–300 meters) where lig ...
Scripps Classroom Connection
... • High topography • Chunks of crust are thrust upward and over crust on the other side • Thick crust and asthenosphere • Horizontal shortening ...
... • High topography • Chunks of crust are thrust upward and over crust on the other side • Thick crust and asthenosphere • Horizontal shortening ...
Types of plate boundaries
... other, pushing it slowly downward into the mantle where it melts to form magma. The subducted lithosphere remains cold and brittle as it descends and can fracture under compressional stress. These fractures generate earthquakes that define a zone of quakes at increasing focal depth under the overrid ...
... other, pushing it slowly downward into the mantle where it melts to form magma. The subducted lithosphere remains cold and brittle as it descends and can fracture under compressional stress. These fractures generate earthquakes that define a zone of quakes at increasing focal depth under the overrid ...
Post-Rift Deformation of Passive Margins AGU Fall Meeting 2005
... seismic and well data show compressional features on several margins. The compressional deformation appears to be vary as a function of distance from the mid-ocean ridges at the time of deformation, and thus are most intense in present deep water settings. The compressional deformations appear to be ...
... seismic and well data show compressional features on several margins. The compressional deformation appears to be vary as a function of distance from the mid-ocean ridges at the time of deformation, and thus are most intense in present deep water settings. The compressional deformations appear to be ...
Sea Monsters - The Barr Bunch
... school bus. Many glow in the dark. Most have razor-sharp teeth. And we're just beginning to discover more of them. Few places on our planet are as mysterious as the deep sea. Until recently, scientists doubted that many creatures could live there. Now experts are taking a deeper look at the ocean. S ...
... school bus. Many glow in the dark. Most have razor-sharp teeth. And we're just beginning to discover more of them. Few places on our planet are as mysterious as the deep sea. Until recently, scientists doubted that many creatures could live there. Now experts are taking a deeper look at the ocean. S ...
Geodynamic processes and biochemical interactions at seafloor
... the structure of continental rifts and oceanic spreading centers, oceanic fracture zones, seamounts, and rock magnetism. He ventured and researched all over the world, from the depths of the Atlantic and Pacific oceans to the heat of the Afar Depression (in northeastern Africa) and the heights of Ti ...
... the structure of continental rifts and oceanic spreading centers, oceanic fracture zones, seamounts, and rock magnetism. He ventured and researched all over the world, from the depths of the Atlantic and Pacific oceans to the heat of the Afar Depression (in northeastern Africa) and the heights of Ti ...
Chapter 36 F Open Ocean Deep Sea
... 1.1.1 Status of and trends for biodiversity In the well-studied North Atlantic, local macrofaunal (300 µm-3 cm) species diversity on the continental slope exceeds that of the adjacent continental shelf, and estimates of bathyal diversity in other parts of the world ocean are comparably high (Rex and ...
... 1.1.1 Status of and trends for biodiversity In the well-studied North Atlantic, local macrofaunal (300 µm-3 cm) species diversity on the continental slope exceeds that of the adjacent continental shelf, and estimates of bathyal diversity in other parts of the world ocean are comparably high (Rex and ...
J
... Fuca Ridge off the northwestern US coast, and one on the Mid-Atlantic Ridge about halfway between Florida and West Africa. The drill cores recovered from these sites allow scientists to study the variability in rock-water reactions that occur under the different physical and chemical conditions foun ...
... Fuca Ridge off the northwestern US coast, and one on the Mid-Atlantic Ridge about halfway between Florida and West Africa. The drill cores recovered from these sites allow scientists to study the variability in rock-water reactions that occur under the different physical and chemical conditions foun ...
EGU2017-10612 - CO Meeting Organizer
... Using gravity anomaly inversion, we produce comprehensive regional maps of crustal thickness and oceanic lithosphere distribution for Antarctica and the Southern Ocean. Crustal thicknesses derived from gravity inversion are consistent with seismic estimates. We determine Moho depth, crustal basement ...
... Using gravity anomaly inversion, we produce comprehensive regional maps of crustal thickness and oceanic lithosphere distribution for Antarctica and the Southern Ocean. Crustal thicknesses derived from gravity inversion are consistent with seismic estimates. We determine Moho depth, crustal basement ...
Abyssal plain
An abyssal plain is an underwater plain on the deep ocean floor, usually found at depths between 3000 and 6000 m. Lying generally between the foot of a continental rise and a mid-ocean ridge, abyssal plains cover more than 50% of the Earth’s surface. They are among the flattest, smoothest and least explored regions on Earth. Abyssal plains are key geologic elements of oceanic basins (the other elements being an elevated mid-ocean ridge and flanking abyssal hills). In addition to these elements, active oceanic basins (those that are associated with a moving plate tectonic boundary) also typically include an oceanic trench and a subduction zone.Abyssal plains were not recognized as distinct physiographic features of the sea floor until the late 1940s and, until very recently, none had been studied on a systematic basis. They are poorly preserved in the sedimentary record, because they tend to be consumed by the subduction process. The creation of the abyssal plain is the end result of spreading of the seafloor (plate tectonics) and melting of the lower oceanic crust. Magma rises from above the asthenosphere (a layer of the upper mantle) and as this basaltic material reaches the surface at mid-ocean ridges it forms new oceanic crust. This is constantly pulled sideways by spreading of the seafloor. Abyssal plains result from the blanketing of an originally uneven surface of oceanic crust by fine-grained sediments, mainly clay and silt. Much of this sediment is deposited by turbidity currents that have been channelled from the continental margins along submarine canyons down into deeper water. The remainder of the sediment is composed chiefly of pelagic sediments. Metallic nodules are common in some areas of the plains, with varying concentrations of metals, including manganese, iron, nickel, cobalt, and copper. These nodules may provide a significant resource for future mining ventures.Owing in part to their vast size, abyssal plains are currently believed to be a major reservoir of biodiversity. The abyss also exerts significant influence upon ocean carbon cycling, dissolution of calcium carbonate, and atmospheric CO2 concentrations over timescales of 100–1000 years. The structure and function of abyssal ecosystems are strongly influenced by the rate of flux of food to the seafloor and the composition of the material that settles. Factors such as climate change, fishing practices, and ocean fertilization are expected to have a substantial effect on patterns of primary production in the euphotic zone. This will undoubtedly impact the flux of organic material to the abyss in a similar manner and thus have a profound effect on the structure, function and diversity of abyssal ecosystems.