here - El Cerrito Historical Society
... During the most recent chapters of active plate margin history in California, the Coast Ranges have had the starring role. Following the mid-Jurassic collision in the Sierra Nevada that blocked one or more subduction zones (Schweickert and Cowan, 1975; Moores and Day, 1984), subduction stepped west ...
... During the most recent chapters of active plate margin history in California, the Coast Ranges have had the starring role. Following the mid-Jurassic collision in the Sierra Nevada that blocked one or more subduction zones (Schweickert and Cowan, 1975; Moores and Day, 1984), subduction stepped west ...
Rock Cycle Slideshow
... Weathering (continued) • Weathering refers to the group of destructive processes that change the character of the rock at or near the earth’s surface • Mechanical weathering breaks rock into smaller pieces: an example is water freezing and expanding in cracks causing rock to break apart • Exposure ...
... Weathering (continued) • Weathering refers to the group of destructive processes that change the character of the rock at or near the earth’s surface • Mechanical weathering breaks rock into smaller pieces: an example is water freezing and expanding in cracks causing rock to break apart • Exposure ...
Mountains Without Collision: Orogenic Activity in Accretionary
... growth and mineralization throughout Earth history. This project will determine if the growth of these mountain belts is the result of local processes specific to each plate boundary or a consequence of global plate interactions through study of the Permo-Triassic history of the Pacific margin of Go ...
... growth and mineralization throughout Earth history. This project will determine if the growth of these mountain belts is the result of local processes specific to each plate boundary or a consequence of global plate interactions through study of the Permo-Triassic history of the Pacific margin of Go ...
No Slide Title
... by evolution of sialic material Sialic crust contains considerable silicon, oxygen and aluminum as in present day continental crust Only sialic-rich crust, because of its lower density, is immune to destruction by subduction ...
... by evolution of sialic material Sialic crust contains considerable silicon, oxygen and aluminum as in present day continental crust Only sialic-rich crust, because of its lower density, is immune to destruction by subduction ...
Data/hora: 29/03/2017 13:30:32 Provedor de dados: 5 País: France
... Resumo: The crustal structure in the southern Davis Strait and the adjacent ocean-continent transition zone in NE Labrador Sea was determined along a 185-km-long refraction/wide-angle reflection seismic transect to study the impact of the Iceland mantle plume to this region. A P-wave velocity model ...
... Resumo: The crustal structure in the southern Davis Strait and the adjacent ocean-continent transition zone in NE Labrador Sea was determined along a 185-km-long refraction/wide-angle reflection seismic transect to study the impact of the Iceland mantle plume to this region. A P-wave velocity model ...
Some Geologic Features of the Superior Area, Pinal County, Arizona
... plateaus. One is cut deeply by Martinez Wash along the border of an extensive intrusive rhyolite complex to the east, and is terminated abruptly by an erosional escarpment to the west and south where Precambrian granite and Pinal Schist are exposed. The second tuff plateau extends eastward and south ...
... plateaus. One is cut deeply by Martinez Wash along the border of an extensive intrusive rhyolite complex to the east, and is terminated abruptly by an erosional escarpment to the west and south where Precambrian granite and Pinal Schist are exposed. The second tuff plateau extends eastward and south ...
Geology of the West Troms Basement Complex, northern Norway
... the Sveco karelian shear ing. Since the quartz diorite on southern Senja -- containin g dolerite dyke swarms (Landmark 1973) -- is 1746 Ma old, the dolerites on Senja are unrelated to, and younger than those on Rinqvass eya. The Senja Shear Belt (SSB) is defined by air photo and satellite imagery in ...
... the Sveco karelian shear ing. Since the quartz diorite on southern Senja -- containin g dolerite dyke swarms (Landmark 1973) -- is 1746 Ma old, the dolerites on Senja are unrelated to, and younger than those on Rinqvass eya. The Senja Shear Belt (SSB) is defined by air photo and satellite imagery in ...
Jigsaw Readings
... Some of those shapes are shown in figure 13.10. What evidence do you see to indicate a collision? The collision of Earth’s tectonic plates is similar to car collisions. Of course, a tectonic collision is much slower and zones of collision can be thousands of kilometers long forming long chains o ...
... Some of those shapes are shown in figure 13.10. What evidence do you see to indicate a collision? The collision of Earth’s tectonic plates is similar to car collisions. Of course, a tectonic collision is much slower and zones of collision can be thousands of kilometers long forming long chains o ...
II. Subduction-related granites: “Andean” I
... Alkaline, peralkaline (not that the two terms do not have the same values, one refers to a magmatic series, the other to a position in A/CNK vs. A/NK diagrams). Low K/Na, low Mg/Mg+Fe 2. Trace elements Rich in LREE (10-100 times more than I and S types !). Some huge depletions and enrichment relativ ...
... Alkaline, peralkaline (not that the two terms do not have the same values, one refers to a magmatic series, the other to a position in A/CNK vs. A/NK diagrams). Low K/Na, low Mg/Mg+Fe 2. Trace elements Rich in LREE (10-100 times more than I and S types !). Some huge depletions and enrichment relativ ...
ESS 305 Olympic National Park 2 May 2015
... Rocks are part of the Coast Range Terrane, which extends from northern California to Vancouver Island. The Coast Range Terrane consists of pillowed and massive basalt flows (the Crescent here) mostly of Eocene age, overlain by Eocene and younger marine sedimentary rocks (the Peripheral). The basalts ...
... Rocks are part of the Coast Range Terrane, which extends from northern California to Vancouver Island. The Coast Range Terrane consists of pillowed and massive basalt flows (the Crescent here) mostly of Eocene age, overlain by Eocene and younger marine sedimentary rocks (the Peripheral). The basalts ...
Types of Plate Boundaries
... • Plate made of ocean crust is being destroyed by subducting under another plate of ocean crust. • Also called a subduction zone. • The older, colder crust will be subducted because it is more dense. • Large (9.0+) powerful earthquakes with tsunamis are common. • Earthquakes are deep (near asthenosp ...
... • Plate made of ocean crust is being destroyed by subducting under another plate of ocean crust. • Also called a subduction zone. • The older, colder crust will be subducted because it is more dense. • Large (9.0+) powerful earthquakes with tsunamis are common. • Earthquakes are deep (near asthenosp ...
A note on the gravitational field of the right rectangular prism
... The investigations described focused especially on the last crustal layer of CRUST 2.0, which represents the boundary surface between crust and mantle, widely known as Mohorovicic discontinuity. A direct comparison of the Moho structure as given from the crustal model CRUST 2.0 with the respective c ...
... The investigations described focused especially on the last crustal layer of CRUST 2.0, which represents the boundary surface between crust and mantle, widely known as Mohorovicic discontinuity. A direct comparison of the Moho structure as given from the crustal model CRUST 2.0 with the respective c ...
Proterozoic
... either due to an increase in oxygen or a more thorough mixing of the oceanic water column.[5] Red beds, which are colored by hematite, indicate an increase in atmospheric oxygen after 2 billion years ago; they are not found in older rocks.[5] The oxygen buildup was probably due to two factors: a fil ...
... either due to an increase in oxygen or a more thorough mixing of the oceanic water column.[5] Red beds, which are colored by hematite, indicate an increase in atmospheric oxygen after 2 billion years ago; they are not found in older rocks.[5] The oxygen buildup was probably due to two factors: a fil ...
metamorphic rocks supplement, geol 1010
... temperature but relatively low pressure. The rock greenschist can result. The region near the volcanoes and magmatic intrusions, shown as hi T/P in the figure above, tends to be relatively hot at shallow depths. This is due to the igneous activity that can occur there for tens of millions of years w ...
... temperature but relatively low pressure. The rock greenschist can result. The region near the volcanoes and magmatic intrusions, shown as hi T/P in the figure above, tends to be relatively hot at shallow depths. This is due to the igneous activity that can occur there for tens of millions of years w ...
METAMORPHISM & METAMORPHIC ROCKS
... Deep-sea sediments, those found at depths greater than about 500 m, cover roughly two-thirds of the Earth. The predominant deep sediment is carbonate ooze, which covers nearly half the ocean floor ...
... Deep-sea sediments, those found at depths greater than about 500 m, cover roughly two-thirds of the Earth. The predominant deep sediment is carbonate ooze, which covers nearly half the ocean floor ...
3.2 3.3 3.4 Rock Types
... • Hot liquid rock on earth’s surface is called _________. • Fragments of rocks, minerals, and remains of living things are ____________. • Rocks change from one type to another in the _______ __________. • Liquid rock that cools on or below the surface forms ______ _________. ...
... • Hot liquid rock on earth’s surface is called _________. • Fragments of rocks, minerals, and remains of living things are ____________. • Rocks change from one type to another in the _______ __________. • Liquid rock that cools on or below the surface forms ______ _________. ...
Crust and Upper Mantle Structure in Northeast of Tibet from
... Eray Kocel Continental rifting and the subsequent development of new oceanic crust involve the complex interaction of tectonic, magmatic and geodynamic processes that results in a variety of passive margin styles. Based upon the amount of volcanism that occurs, passive margins may be classified as v ...
... Eray Kocel Continental rifting and the subsequent development of new oceanic crust involve the complex interaction of tectonic, magmatic and geodynamic processes that results in a variety of passive margin styles. Based upon the amount of volcanism that occurs, passive margins may be classified as v ...
Plate Tectonic, Earthquakes, and Volcanoes Test Review
... 11. The (newest/ oldest) crust is farthest away from the mid-ocean ridges. 12. How do oceanic magnetic stripes provide proof of sea floor spreading? When new oceanic crust is still molten, the magnetic grains will align with the magnetic poles (like a compass). Throughout Earth’s history, the poles ...
... 11. The (newest/ oldest) crust is farthest away from the mid-ocean ridges. 12. How do oceanic magnetic stripes provide proof of sea floor spreading? When new oceanic crust is still molten, the magnetic grains will align with the magnetic poles (like a compass). Throughout Earth’s history, the poles ...
QUIZ
... a. Briefly explain using specific detail or examples how the following observations were used to support Wegener’s hypothesis of continental drift. (choose 3) fit of the continents paleoclimate fossil record glacial evidence mountain ranges and rock types b. What important explanation was missing fr ...
... a. Briefly explain using specific detail or examples how the following observations were used to support Wegener’s hypothesis of continental drift. (choose 3) fit of the continents paleoclimate fossil record glacial evidence mountain ranges and rock types b. What important explanation was missing fr ...
The evolution of the southern Cordilleran foreland thrust and fold
... from which the other major faults branch. The basal décollement separates weak, layered, anisotropic supracrustal rocks above from strong, massive Paleoproterozoic rocks below; but toward the front of the belt it rises, across thrust ramps, into one or more higher, laterally extensive detachments th ...
... from which the other major faults branch. The basal décollement separates weak, layered, anisotropic supracrustal rocks above from strong, massive Paleoproterozoic rocks below; but toward the front of the belt it rises, across thrust ramps, into one or more higher, laterally extensive detachments th ...
Dr. Stephen Marshak
... province (Interior Plains and plateaus), even though all these areas are underlain by similar cratonic-platform crust. Lack of dramatic topography leads to the impression that the Midcontinent has been tectonically stable through the Phanerozoic. In fact, the region hosts a half-billion year record ...
... province (Interior Plains and plateaus), even though all these areas are underlain by similar cratonic-platform crust. Lack of dramatic topography leads to the impression that the Midcontinent has been tectonically stable through the Phanerozoic. In fact, the region hosts a half-billion year record ...
Study Guide: Earth has Several Layers: (Test on Tuesday 20, 2011)
... Study Guide: Earth has Several Layers: (Test on Tuesday 20, 2011) 8. Define all of the following vocabulary words: inner core, outer core, mantle, crust, lithosphere, anthenosphere, and tectonic plate. 9. Be able to draw the earth and its many layers along with labeling them. 10. Know the characteri ...
... Study Guide: Earth has Several Layers: (Test on Tuesday 20, 2011) 8. Define all of the following vocabulary words: inner core, outer core, mantle, crust, lithosphere, anthenosphere, and tectonic plate. 9. Be able to draw the earth and its many layers along with labeling them. 10. Know the characteri ...
Prezentace aplikace PowerPoint
... QFL Diagram: The QFL diagram is to the right. Observe the following: >>>> Quartz is at the top, feldspar on the lower left, and lithics on the lower right. It is always done this way. >>>> The ternary diagram is divided into 5 fields, here color coded. The boundaries among the fields, left and rig ...
... QFL Diagram: The QFL diagram is to the right. Observe the following: >>>> Quartz is at the top, feldspar on the lower left, and lithics on the lower right. It is always done this way. >>>> The ternary diagram is divided into 5 fields, here color coded. The boundaries among the fields, left and rig ...
Great Lakes tectonic zone
The Great Lakes tectonic zone is bounded by South Dakota at its tip and heads northeast to south of Duluth, Minnesota, then heads east through northern Wisconsin, Marquette, Michigan, and then trends more northeasterly to skim the northern-most shores of lakes Michigan and Huron before ending in the Sudbury, Ontario, Canada, area.During the Late Archean Era the Algoman orogeny added landmass to the Superior province by volcanic activity and continental collision along a boundary that stretches from present-day South Dakota, U.S., into the Lake Huron region near Sudbury, Ontario, Canada.This crustal boundary is the Great Lakes tectonic zone. It is 1,400 km (870 mi) long, and separates the older Archean gneissic terrane to the south from younger Late Archean greenstone-granite terrane to the north.The zone is characterized by active compression during the Algoman orogeny (about 2,700 million years ago), a pulling-apart (extensional) tectonics (2,450 to 2,100 million years ago), a second compression during the Penokean orogeny (1,900 to 1,850 million years ago), a second extension during Middle Proterozoic time (1,600 million years ago) and minor reactivation during Phanerozoic time (the past 500 million years).Collision began along the Great Lakes tectonic zone (GLTZ) with the Algoman mountain-building event and continued for tens of millions of years. During the formation of the GLTZ, the gneissic Minnesota River Valley subprovince was thrust up onto the Superior province's edge as it consumed the Superior province's oceanic crust. Fragmentation of the Kenorland supercontinent began 2,450 million years ago and was completed by 2,100 million years ago. The Wyoming province is the continental landmass that is hypothesized to have rifted away from the southern Superior province portion of Kenorland, before moving rapidly west and docking with the Laurentia supercontinent 1,850 to 1,715 million years ago. Sedimentation from the GLTZ-rifting environment continued into the Penokean orogeny, which is the next major tectonic event in the Great Lakes region. Several earthquakes have been documented in Minnesota, Michigan's Upper Peninsula and Sudbury in the last 120 years along the GLTZ.