Topic: - Murchison Middle School
... Essential Question: What crustal features are created by the movement of Earth’s plates? Convergent Boundary When an ocean plate collides with a continental plate, the ocean plate sinks under the continental plate (subduction) Crustal features: trenches and volcanic mountains ...
... Essential Question: What crustal features are created by the movement of Earth’s plates? Convergent Boundary When an ocean plate collides with a continental plate, the ocean plate sinks under the continental plate (subduction) Crustal features: trenches and volcanic mountains ...
On the enigmatic birth of the Pacific Plate within the Panthalassa
... Phoenix lineations (11). The geometry of the triangle that is formed by these sets of anomalies (Fig. 1) implies that the Pacific Plate (PAC) grew as a result of ocean spreading at three ridges that must have separated the Pacific Plate from three conceptual preexisting oceanic plates. These plates ...
... Phoenix lineations (11). The geometry of the triangle that is formed by these sets of anomalies (Fig. 1) implies that the Pacific Plate (PAC) grew as a result of ocean spreading at three ridges that must have separated the Pacific Plate from three conceptual preexisting oceanic plates. These plates ...
Subalkaline basaltic rocks
... Areas of extensional tectonics Elongate perpendicular to tension Widespread in western USA Pinacate example ...
... Areas of extensional tectonics Elongate perpendicular to tension Widespread in western USA Pinacate example ...
The Expanding Pacific
... The Pacific plays an extraordinary role in contemporary geotectonics and this role dates back to Wegener’s theory. Earlier, in the time of the land-bridge theory, the development of all the oceans was considered in the same way, as progressive, and this progressiveness was well-documented by paleont ...
... The Pacific plays an extraordinary role in contemporary geotectonics and this role dates back to Wegener’s theory. Earlier, in the time of the land-bridge theory, the development of all the oceans was considered in the same way, as progressive, and this progressiveness was well-documented by paleont ...
CMT TEST 1st Week of March
... 2. Convection is the heat transfer by the movement of currents within a fluid. Heating and cooling of the fluid mantle, changes in density and gravity combine to cause convection currents in the mantle. 3. The movement of convection currents in the mantle is the major force that causes plate movemen ...
... 2. Convection is the heat transfer by the movement of currents within a fluid. Heating and cooling of the fluid mantle, changes in density and gravity combine to cause convection currents in the mantle. 3. The movement of convection currents in the mantle is the major force that causes plate movemen ...
Chapter 8
... Types of Plate Contact • Zones of plate contact: – Divergent plate boundarieswhen plates move apart from one another • Brings important elements (Cu, Pb, and Ag) to surface of Earth ...
... Types of Plate Contact • Zones of plate contact: – Divergent plate boundarieswhen plates move apart from one another • Brings important elements (Cu, Pb, and Ag) to surface of Earth ...
40. Regional Problems - Deep Sea Drilling Project
... volcanoes depressed a moat around them, and the downbending of the crust opened tension cracks which were the site of other fissure flows. The flows were of an enormous extent and buried most of the faulted topography on the surface of the rise. The Darwin Rise hypothesis originated in the context ...
... volcanoes depressed a moat around them, and the downbending of the crust opened tension cracks which were the site of other fissure flows. The flows were of an enormous extent and buried most of the faulted topography on the surface of the rise. The Darwin Rise hypothesis originated in the context ...
theme 5: the deeper earth
... One of the long-standing paradoxes about the Earth' s mantle is that isotopic evidence points to long-term separation of chemically distinct reservoirs while geophysical evidence suggests convection extending over its entire depth. Geochemical observations: isotopic variations of midocean ridge basa ...
... One of the long-standing paradoxes about the Earth' s mantle is that isotopic evidence points to long-term separation of chemically distinct reservoirs while geophysical evidence suggests convection extending over its entire depth. Geochemical observations: isotopic variations of midocean ridge basa ...
volcano - Cloudfront.net
... surface because it is less dense than the surrounding rock. Not all magma will come to the Earth’s surface. Some will cool and solidify while still in the Earth’s crust. ...
... surface because it is less dense than the surrounding rock. Not all magma will come to the Earth’s surface. Some will cool and solidify while still in the Earth’s crust. ...
Planforms of self-consistently generated plates in 3D spherical
... GEOPHYSICAL RESEARCH LETTERS, VOL. 35, L19312, doi:10.1029/2008GL035190, 2008 ...
... GEOPHYSICAL RESEARCH LETTERS, VOL. 35, L19312, doi:10.1029/2008GL035190, 2008 ...
Daily Warm-Ups #61-80
... a. Don’t forget to answer your questions Warm-Up #67 1. Explain how heat was transferred in the last lab, “Energy on the Move”. 2. Review: create 1 test question related to Ch. 7 sections 4, 5, or 6 Warm-Up #68 1. Name the layers of the Earth. 2. What do geologists study? 3. What are seismic waves? ...
... a. Don’t forget to answer your questions Warm-Up #67 1. Explain how heat was transferred in the last lab, “Energy on the Move”. 2. Review: create 1 test question related to Ch. 7 sections 4, 5, or 6 Warm-Up #68 1. Name the layers of the Earth. 2. What do geologists study? 3. What are seismic waves? ...
The Earth`s Interior
... Continental flood basalts (CFBs) Large Igneous Provinces (LIPs) Oceanic plateaus Some rifts Continental flood basalts (CFBs) ...
... Continental flood basalts (CFBs) Large Igneous Provinces (LIPs) Oceanic plateaus Some rifts Continental flood basalts (CFBs) ...
Petrology Lecture 8
... Pb Is Quite Scarce in the Mantle • Mantle-derived melts are susceptible to contamination from UTh-Pb-rich reservoirs which can add a significant proportion to the total Pb • U, Pb, and Th are concentrated in sialic reservoirs, such as the continental crust, which develop high concentrations of the ...
... Pb Is Quite Scarce in the Mantle • Mantle-derived melts are susceptible to contamination from UTh-Pb-rich reservoirs which can add a significant proportion to the total Pb • U, Pb, and Th are concentrated in sialic reservoirs, such as the continental crust, which develop high concentrations of the ...
How does the challenge differ between plate boundaries, plate
... fragments of continental crust are displaced eastward by the collision along major strike-slip ...
... fragments of continental crust are displaced eastward by the collision along major strike-slip ...
WHAT TYPE - LambertEarth
... a. How the earth rotates on its axis b. How new rocks are formed 3) What happens at a divergent boundary? c. How the weather happens a. The two plates move towards each other. d. How were the continents able to b. The two plates move away from each other. move from Pangaea to their c. One plate is f ...
... a. How the earth rotates on its axis b. How new rocks are formed 3) What happens at a divergent boundary? c. How the weather happens a. The two plates move towards each other. d. How were the continents able to b. The two plates move away from each other. move from Pangaea to their c. One plate is f ...
Unraveling the Tapestry of Ocean Crust
... underlying rocks by measuring the time it takes for sound to travel from one source to many different receivers, or from many sources to a single receiver. In the oceans, this technique has yielded a simple picture of a basaltic, layered crust about 7 kilometers (4.3 miles) thick, underlain by the m ...
... underlying rocks by measuring the time it takes for sound to travel from one source to many different receivers, or from many sources to a single receiver. In the oceans, this technique has yielded a simple picture of a basaltic, layered crust about 7 kilometers (4.3 miles) thick, underlain by the m ...
Slide 1
... convergence direction between Africa and Eurasia. There is considerable earthquake activity along the Apennines BUT Earthquakes are concentrated beneath the mountains and descend to the depth of ~ 100 km. ...
... convergence direction between Africa and Eurasia. There is considerable earthquake activity along the Apennines BUT Earthquakes are concentrated beneath the mountains and descend to the depth of ~ 100 km. ...
Edible Tectonics Lab 2011
... Introduction The theory of plate tectonics states that the Earth’s surface is broken into small and large rigid plates. These plates make up the layer known as the ___. This layer sits on top of the asthenosphere, or upper ____. Because of extreme heat from below and pressure from above, this layer ...
... Introduction The theory of plate tectonics states that the Earth’s surface is broken into small and large rigid plates. These plates make up the layer known as the ___. This layer sits on top of the asthenosphere, or upper ____. Because of extreme heat from below and pressure from above, this layer ...
Continents on the move
... In 1968, the idea of plate tectonics was put forward. This idea linked all the evidence which had been discovered up until that time. At first, the idea of plate tectonics was treated like any other new scientific idea. Scientists tested it and examined the evidence very closely. New evidence was us ...
... In 1968, the idea of plate tectonics was put forward. This idea linked all the evidence which had been discovered up until that time. At first, the idea of plate tectonics was treated like any other new scientific idea. Scientists tested it and examined the evidence very closely. New evidence was us ...
Chapter 4. The Outer Shells of Earth
... (2) The plate. This is that part of the crust and upper mantle that translates coherently in the course of plate tectonics . The thickness of the plate may be controlled by chemical or buoyancy considerations or by stress, as well as by temperature, but there is no known way to measure its thickness ...
... (2) The plate. This is that part of the crust and upper mantle that translates coherently in the course of plate tectonics . The thickness of the plate may be controlled by chemical or buoyancy considerations or by stress, as well as by temperature, but there is no known way to measure its thickness ...
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 ...
7-3 Plate Tectonics Test
... ____ 23. The downward part of a convection current causes a sinking force that ____. a. pulls tectonic plates toward one another b. moves plates apart from one another c. lifts and splits the lithosphere d. creates a divergent boundary ____ 24. Features found at divergent plate boundaries include __ ...
... ____ 23. The downward part of a convection current causes a sinking force that ____. a. pulls tectonic plates toward one another b. moves plates apart from one another c. lifts and splits the lithosphere d. creates a divergent boundary ____ 24. Features found at divergent plate boundaries include __ ...
Plate Tectonics
... ■ Hands-on Activities ■ Meeting Individual Needs (Extension and Intervention) ■ Transparency Activities A teacher support and planning section including ■ Content Outline of the chapter ...
... ■ Hands-on Activities ■ Meeting Individual Needs (Extension and Intervention) ■ Transparency Activities A teacher support and planning section including ■ Content Outline of the chapter ...
Folded Mountains
... In case when many layers of the Earth's crust are moved vertically upward between two parallel fault lines, Fault Block Mountains result. The vertical force is caused by the Earth's internal ...
... In case when many layers of the Earth's crust are moved vertically upward between two parallel fault lines, Fault Block Mountains result. The vertical force is caused by the Earth's internal ...
geo-4840 tectonics-s04
... Continental collision, suture zones, deformation and metamorphism, mountain building Extensional collapse, faulting and collapse basins 4) Terminal stage Near closure of ocean, mature arcs and back-arc, accreationary wedges, HP-LT metamorphic complexes (Mediterranean See area) 3) Vaning stage: Intra ...
... Continental collision, suture zones, deformation and metamorphism, mountain building Extensional collapse, faulting and collapse basins 4) Terminal stage Near closure of ocean, mature arcs and back-arc, accreationary wedges, HP-LT metamorphic complexes (Mediterranean See area) 3) Vaning stage: Intra ...
Plate tectonics
Plate tectonics (from the Late Latin tectonicus, from the Greek: τεκτονικός ""pertaining to building"") is a scientific theory that describes the large-scale motion of Earth's lithosphere. This theoretical model builds on the concept of continental drift which was developed during the first few decades of the 20th century. The geoscientific community accepted the theory after the concepts of seafloor spreading were later developed in the late 1950s and early 1960s.The lithosphere, which is the rigid outermost shell of a planet (on Earth, the crust and upper mantle), is broken up into tectonic plates. On Earth, there are seven or eight major plates (depending on how they are defined) and many minor plates. Where plates meet, their relative motion determines the type of boundary; convergent, divergent, or transform. Earthquakes, volcanic activity, mountain-building, and oceanic trench formation occur along these plate boundaries. The lateral relative movement of the plates typically varies from zero to 100 mm annually.Tectonic plates are composed of oceanic lithosphere and thicker continental lithosphere, each topped by its own kind of crust. Along convergent boundaries, subduction carries plates into the mantle; the material lost is roughly balanced by the formation of new (oceanic) crust along divergent margins by seafloor spreading. In this way, the total surface of the globe remains the same. This prediction of plate tectonics is also referred to as the conveyor belt principle. Earlier theories (that still have some supporters) propose gradual shrinking (contraction) or gradual expansion of the globe.Tectonic plates are able to move because the Earth's lithosphere has greater strength than the underlying asthenosphere. Lateral density variations in the mantle result in convection. Plate movement is thought to be driven by a combination of the motion of the seafloor away from the spreading ridge (due to variations in topography and density of the crust, which result in differences in gravitational forces) and drag, with downward suction, at the subduction zones. Another explanation lies in the different forces generated by the rotation of the globe and the tidal forces of the Sun and Moon. The relative importance of each of these factors and their relationship to each other is unclear, and still the subject of much debate.