GEOL1010 Sample Hour Exam 3
... a) at depths greater than 400 km b) at depths less than 100 km d) in the central regions of plates (cratons) e) in the lower mantle. 11. The deepest earthquakes occur at a depth of about: a) 50km b) 100km c) 400km d) 670km ...
... a) at depths greater than 400 km b) at depths less than 100 km d) in the central regions of plates (cratons) e) in the lower mantle. 11. The deepest earthquakes occur at a depth of about: a) 50km b) 100km c) 400km d) 670km ...
REGION II: Southeastern Minnesota
... GEOLOGIC OVERVIEW Buried very deep under the surface of Southeastern Minnesota are ancient igneous rocks similar to the North Shore. On top of all these older rocks are several hundred feet of rock laid down in shallow seas about 600 million years ago. There is also some glacial debris brought in fr ...
... GEOLOGIC OVERVIEW Buried very deep under the surface of Southeastern Minnesota are ancient igneous rocks similar to the North Shore. On top of all these older rocks are several hundred feet of rock laid down in shallow seas about 600 million years ago. There is also some glacial debris brought in fr ...
Chapter 5 Metamorphic Rocks Notes
... COMMON METAMORPHIC ROCKS • 2 types: Foliated & Non-foliated ...
... COMMON METAMORPHIC ROCKS • 2 types: Foliated & Non-foliated ...
Metamorphic. evolution of high-pressure, low
... [email protected], Department of Geology, Smith College, Northampton, MA ...
... [email protected], Department of Geology, Smith College, Northampton, MA ...
Shoreline Fit of the Continents Fossil Evidence
... The fossils from the exact same animals are found on continents separated by vast oceans. ...
... The fossils from the exact same animals are found on continents separated by vast oceans. ...
White et al Nice abstract
... new acquisition on the Atlantic volcanic margins with new techniques for modelling their evolution. We discuss the distribution of igneous rocks along the North Atlantic margins and discuss the temporal and spatial variations in the Iceland mantle plume in the early Tertiary, which have largely cont ...
... new acquisition on the Atlantic volcanic margins with new techniques for modelling their evolution. We discuss the distribution of igneous rocks along the North Atlantic margins and discuss the temporal and spatial variations in the Iceland mantle plume in the early Tertiary, which have largely cont ...
Gravity against tectonics during continental break
... tectonic stretching but also by the distribution of horizontal gravity forces consecutive to lateral variations of the lithostatic pressure at a given depth. Using both analytical and numerical approaches, we show that crust geometry at volcanic margins is certainly primarily controlled by the sudde ...
... tectonic stretching but also by the distribution of horizontal gravity forces consecutive to lateral variations of the lithostatic pressure at a given depth. Using both analytical and numerical approaches, we show that crust geometry at volcanic margins is certainly primarily controlled by the sudde ...
Hadean and Archean
... radiation in the upper atmosphere • radiation disrupts water molecules and releases their oxygen and hydrogen • could account for 2% of present-day oxygen • but with 2% oxygen, ozone forms, creating a barrier ...
... radiation in the upper atmosphere • radiation disrupts water molecules and releases their oxygen and hydrogen • could account for 2% of present-day oxygen • but with 2% oxygen, ozone forms, creating a barrier ...
Active tectonic deformation in Central Tanzania: the Manyara
... during the Late Miocene to Pliocene. From the Middle Pleistocene onwards, deformations related to the second rifting stage propagated southwards to the Dodoma region. These young structures have still limited morphological expressions compared to the structures formed during the first stage. However ...
... during the Late Miocene to Pliocene. From the Middle Pleistocene onwards, deformations related to the second rifting stage propagated southwards to the Dodoma region. These young structures have still limited morphological expressions compared to the structures formed during the first stage. However ...
Plate Tectonics PowerPoint
... 3. Ocean-Ocean Collision • When two oceanic plates collide, one runs over the other causing 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 deep-sea trench. • The deepest parts of the ocean are ...
... 3. Ocean-Ocean Collision • When two oceanic plates collide, one runs over the other causing 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 deep-sea trench. • The deepest parts of the ocean are ...
Continental Crust
... • The Earth is made up of 3 main layers (core, mantle, crust) • On the surface of the Earth are tectonic plates that slowly move around the globe • Plates are made of crust and upper mantle (lithosphere) • There are 2 types of plates • There are 3 types of plate boundaries • Volcanoes and Earthquake ...
... • The Earth is made up of 3 main layers (core, mantle, crust) • On the surface of the Earth are tectonic plates that slowly move around the globe • Plates are made of crust and upper mantle (lithosphere) • There are 2 types of plates • There are 3 types of plate boundaries • Volcanoes and Earthquake ...
Mountain Belts and the Continental Crust
... accreted the landmass onto the edge of the larger North American continent. • Today, portions of the ancient Avalonia landmass occur in scattered outcrop belts along the eastern margin of North America. • One belt occurs in Newfoundland, another occurs along the western Bay of Fundy into eastern Mai ...
... accreted the landmass onto the edge of the larger North American continent. • Today, portions of the ancient Avalonia landmass occur in scattered outcrop belts along the eastern margin of North America. • One belt occurs in Newfoundland, another occurs along the western Bay of Fundy into eastern Mai ...
Late - to post-orogenic tectonic processes and exhumation
... Partial melting in astenosphere during decompression ...
... Partial melting in astenosphere during decompression ...
earth history unit 3
... - Band Iron Formations (BIF): alternating layers of iron oxides and chert deposited in the sea (chert is a type of quartz) - The BIF are the principle source of iron ore around the world today. - After 2.0 BY there would be so much free oxygen (about 1%) that very minor dissolved iron would reach th ...
... - Band Iron Formations (BIF): alternating layers of iron oxides and chert deposited in the sea (chert is a type of quartz) - The BIF are the principle source of iron ore around the world today. - After 2.0 BY there would be so much free oxygen (about 1%) that very minor dissolved iron would reach th ...
docx
... Georgia to Maine) were all tilted by the same massive tectonic event that happened about 400 million years ago. What was this event, and what type of plate tectonic boundary did it occur along? ...
... Georgia to Maine) were all tilted by the same massive tectonic event that happened about 400 million years ago. What was this event, and what type of plate tectonic boundary did it occur along? ...
by Henry Simmons Before there was the Pangean supercontinent
... Periodically they b a n g e d a n d jostled one another, occasionally welding to or tearing away from each other or one of the major paleocontinental blocks. A bare hundred million years into the process, by the time of the Ordovician period 450 million to 500 million years ago, the gradual closing ...
... Periodically they b a n g e d a n d jostled one another, occasionally welding to or tearing away from each other or one of the major paleocontinental blocks. A bare hundred million years into the process, by the time of the Ordovician period 450 million to 500 million years ago, the gradual closing ...
Word format
... 21. North America and Europe seem to show different paleomagnetic north pole locations for similaraged rocks. The reason for this is: A. there was more than one north pole when these rocks formed B. the pole was wandering around so the paleomagnetic record is inaccurate C. North America and Europe ...
... 21. North America and Europe seem to show different paleomagnetic north pole locations for similaraged rocks. The reason for this is: A. there was more than one north pole when these rocks formed B. the pole was wandering around so the paleomagnetic record is inaccurate C. North America and Europe ...
Notes: Rocks
... minerals are arranged in wavy alternating bands due to recrystallization or flattening. Has a sheet-like or flaky look ex. gneiss , schist, slate no bands or sheets----blocky looking. Looks to contain 1 mineral type. ex. marble, quartzite ...
... minerals are arranged in wavy alternating bands due to recrystallization or flattening. Has a sheet-like or flaky look ex. gneiss , schist, slate no bands or sheets----blocky looking. Looks to contain 1 mineral type. ex. marble, quartzite ...
Study Guide - Del Mar College
... - Band Iron Formations (BIF): alternating layers of iron oxides and chert deposited in the sea (chert is a type of quartz) - The BIF are the principle source of iron ore around the world today. - After 2.0 BY there would be so much free oxygen (about 1%) that very minor dissolved iron would reach th ...
... - Band Iron Formations (BIF): alternating layers of iron oxides and chert deposited in the sea (chert is a type of quartz) - The BIF are the principle source of iron ore around the world today. - After 2.0 BY there would be so much free oxygen (about 1%) that very minor dissolved iron would reach th ...
geology of corridor h - Geological Society of Washington
... This volcanic archipelago collided with the edge of the ancestral North American continent occurred around 460 Ma (late Ordovician time). This collision, the Taconian Orogeny (also called the “Taconic” Orogeny) built a range of mountains. These mountains’ roots are marked in the Piedmont by typical ...
... This volcanic archipelago collided with the edge of the ancestral North American continent occurred around 460 Ma (late Ordovician time). This collision, the Taconian Orogeny (also called the “Taconic” Orogeny) built a range of mountains. These mountains’ roots are marked in the Piedmont by typical ...
Kelsey Beechler ERTH 201 Lab East African Rift Valley Rift valleys
... gives great insight into geologic movements, processes, and information about the type of rock being affected. Lastly, it can give insight to if this occurred previously, in a historical context, and what impact that may have had on the species inhabiting the planet. A triple junction is an area whe ...
... gives great insight into geologic movements, processes, and information about the type of rock being affected. Lastly, it can give insight to if this occurred previously, in a historical context, and what impact that may have had on the species inhabiting the planet. A triple junction is an area whe ...
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.