In-Situ Plate Tectonic Model of the Gulf of Mexico (GOM) and
... In order to understand the tectonics of this region a comparison has been made to the Nova Scotia tectonic setting (Barker, 2011). A remarkable similarity is evident when gravity maps are compared of these two geographically distant regions (Figure 4). Whilst the southern Caribbean oceanic crust fo ...
... In order to understand the tectonics of this region a comparison has been made to the Nova Scotia tectonic setting (Barker, 2011). A remarkable similarity is evident when gravity maps are compared of these two geographically distant regions (Figure 4). Whilst the southern Caribbean oceanic crust fo ...
Geol Soc London Spec Publ 204 2002
... played a crucial role in development of the region. There are at present a large number of other small plates and plate fragments, and there was probably a similar complexity throughout the Cenozoic (Hall 1996, 2002). The magmatic provinces of SE Asia and the western Pacific can be attributed to fou ...
... played a crucial role in development of the region. There are at present a large number of other small plates and plate fragments, and there was probably a similar complexity throughout the Cenozoic (Hall 1996, 2002). The magmatic provinces of SE Asia and the western Pacific can be attributed to fou ...
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... relative motion of South America with respect to Africa) by measuring the distance between the two continents in a direction parallel to the fracture zones and determining the time over which the spreading occurred. (a) Measure the distance between South America and Africa along the fracture zone in ...
... relative motion of South America with respect to Africa) by measuring the distance between the two continents in a direction parallel to the fracture zones and determining the time over which the spreading occurred. (a) Measure the distance between South America and Africa along the fracture zone in ...
Seismic Reflection and Ocean Crustal Structure
... What if the Juan de Fuca Ridge collided with the North American Plate? North American Plate ...
... What if the Juan de Fuca Ridge collided with the North American Plate? North American Plate ...
eastern european alpine system and the carpathian
... larger than their present size and had different shapes. Convergence of continental fragments began in the Late Jurassic by subduction of oceanic crust, but upon complete disappearance of oceanic crust, convergence continued with subduction of small(?) amounts of lower continental crust. During cont ...
... larger than their present size and had different shapes. Convergence of continental fragments began in the Late Jurassic by subduction of oceanic crust, but upon complete disappearance of oceanic crust, convergence continued with subduction of small(?) amounts of lower continental crust. During cont ...
Powerpoint Presentation Physical Geology, 10/e
... Oceanic trench – a narrow, deep trough parallel to the edge of a continent or an island arc • deepest parts of the oceans • Benioff zone earthquake foci begin at trenches and dip landward under continents or island arcs • volcanoes found above upper part of Benioff zone arranged in long belts parall ...
... Oceanic trench – a narrow, deep trough parallel to the edge of a continent or an island arc • deepest parts of the oceans • Benioff zone earthquake foci begin at trenches and dip landward under continents or island arcs • volcanoes found above upper part of Benioff zone arranged in long belts parall ...
Notes for IUGG 2007 talk (Seismic imaging of the lithosphere
... Tasmania was the Middle to Late Cambrian Tyennan Orogeny. The East Tasmania Terrane contains no evidence of the Tyennan Orogen or Proterozoic outcrop, and it is widely thought that the two terranes were juxtaposed during th Middle Devonian Tabberabberan Orogeny. The presence of exposed Precambrian b ...
... Tasmania was the Middle to Late Cambrian Tyennan Orogeny. The East Tasmania Terrane contains no evidence of the Tyennan Orogen or Proterozoic outcrop, and it is widely thought that the two terranes were juxtaposed during th Middle Devonian Tabberabberan Orogeny. The presence of exposed Precambrian b ...
The Deadliest Tsunami in History
... The earthquake was the result of the sliding of the portion of the Earth's crust known as the India plate under the section called the Burma plate. The process has been going on for millennia, one plate pushing against the other until something has to give. The result on December 26 was a rupture th ...
... The earthquake was the result of the sliding of the portion of the Earth's crust known as the India plate under the section called the Burma plate. The process has been going on for millennia, one plate pushing against the other until something has to give. The result on December 26 was a rupture th ...
Thermal modelling of the Laramide orogeny: testing the £at
... areas in the foreland: Idaho/southwestern Montana, and a narrow northeast-trending belt in Colorado known as the Colorado Mineral Belt (e.g. [1^3]; Fig. 1). The Laramide orogeny is widely believed to post-date the Jurassic and late Early Cretaceous accretion of the terranes that make up much of the ...
... areas in the foreland: Idaho/southwestern Montana, and a narrow northeast-trending belt in Colorado known as the Colorado Mineral Belt (e.g. [1^3]; Fig. 1). The Laramide orogeny is widely believed to post-date the Jurassic and late Early Cretaceous accretion of the terranes that make up much of the ...
A Story of Straying Continents
... found throughout the Southern Hemisphere. A study of glacial deposits of Brazil and Africa reports that the tillites are uniform and wide spread. Glaciers moved from southeast to northwest as inferred from the grooves, wrinkles, folds and thrusts in the underlying sediments. The ice flow directions ...
... found throughout the Southern Hemisphere. A study of glacial deposits of Brazil and Africa reports that the tillites are uniform and wide spread. Glaciers moved from southeast to northwest as inferred from the grooves, wrinkles, folds and thrusts in the underlying sediments. The ice flow directions ...
Sea-Floor Spreading and Plate Tectonics 5-4 Sea
... Explain the three types of evidence for sea-floor spreading Explain the process of subduction at deep-ocean trenches Explain how rocks on the ocean floor can be much younger than continental rocks ...
... Explain the three types of evidence for sea-floor spreading Explain the process of subduction at deep-ocean trenches Explain how rocks on the ocean floor can be much younger than continental rocks ...
Coastal Zones - hrsbstaff.ednet.ns.ca
... • the algal dominated zone – The circalittoral zone • the region beyond the infralittoral • dominated by sessile animals such as oysters. ...
... • the algal dominated zone – The circalittoral zone • the region beyond the infralittoral • dominated by sessile animals such as oysters. ...
The reflection seismic survey of project TIPTEQ—the inventory of the
... & Shreve (1988) is a zone with varying thickness above the oceanic crust in which material being transported downwards, exhibits a velocity gradient with respect to both plates. The material flowing within the subduction channel is derived from trench deposits, off scrapings from the base of the upp ...
... & Shreve (1988) is a zone with varying thickness above the oceanic crust in which material being transported downwards, exhibits a velocity gradient with respect to both plates. The material flowing within the subduction channel is derived from trench deposits, off scrapings from the base of the upp ...
Formation and Exhumation of Ultrahigh
... during continued convergence (FIG. 1). The requirement to have continental rocks reach mantle depths has led to the assumption that most UHP terranes formed where continental margins were subducted at the end of ocean closure. The presence of UHP rocks in continent collision zones has caused most wo ...
... during continued convergence (FIG. 1). The requirement to have continental rocks reach mantle depths has led to the assumption that most UHP terranes formed where continental margins were subducted at the end of ocean closure. The presence of UHP rocks in continent collision zones has caused most wo ...
turkish association of petroleum geologists the geological field guide
... The Çatalca region encompasses the border zone between two major Pontic terranes: the İstanbul Zone in the east and the Strandja Massif in the west (Figs. 1 and 2). The boundary between these two terranes is covered by Eocene and younger post-tectonic sedimentary rocks (Fig. 3). The İstanbul Zone is ...
... The Çatalca region encompasses the border zone between two major Pontic terranes: the İstanbul Zone in the east and the Strandja Massif in the west (Figs. 1 and 2). The boundary between these two terranes is covered by Eocene and younger post-tectonic sedimentary rocks (Fig. 3). The İstanbul Zone is ...
4. Structure of the Peru Forearc from Multichannel Seismic
... 13, defines a lower-slope terrace. This region is similar to the transition zone between continental crust and accretionary prism defined along the Middle America Trench off Mexico (Moore et al., 1982). A small sedimentary basin that lies on top of this transitional crust may be as much as 2 s (appr ...
... 13, defines a lower-slope terrace. This region is similar to the transition zone between continental crust and accretionary prism defined along the Middle America Trench off Mexico (Moore et al., 1982). A small sedimentary basin that lies on top of this transitional crust may be as much as 2 s (appr ...
Global mass wasting during the Middle Ordovician: Meteoritic trigger
... discussed further. Therefore, we had a closer look at the palaeolocalities of these megabreccia sites. This revealed that a number of megabreccias were deposited in tectonically unstable areas, e.g., around active volcanic arcs, around collapsing orogens and in continental rift zones, or at least in ...
... discussed further. Therefore, we had a closer look at the palaeolocalities of these megabreccia sites. This revealed that a number of megabreccias were deposited in tectonically unstable areas, e.g., around active volcanic arcs, around collapsing orogens and in continental rift zones, or at least in ...
Slab flattening trigger for isotopic disturbance and magmatic flare
... 2008). However, south of ~36°N, δ18OZr values are ~1.7‰ higher at similar Sri (Saleeby et al., 1987; Kistler, 1990; Pickett and Saleeby, 1994; Miller et al., 1996; Lackey et al., 2005), reflecting a higher proportion of supracrustal material to crystalline basement as a source component. Furthermore ...
... 2008). However, south of ~36°N, δ18OZr values are ~1.7‰ higher at similar Sri (Saleeby et al., 1987; Kistler, 1990; Pickett and Saleeby, 1994; Miller et al., 1996; Lackey et al., 2005), reflecting a higher proportion of supracrustal material to crystalline basement as a source component. Furthermore ...
Document
... - solid but porous limestone structure standing above the surrounding seafloor and constructed by living organisms (often with skeletal material, especially corals) - with a wide variety of morphologies, from isolated Patch Reefs to continuous Barrier Reefs K. Marine Shelves 1. Types a. Continental ...
... - solid but porous limestone structure standing above the surrounding seafloor and constructed by living organisms (often with skeletal material, especially corals) - with a wide variety of morphologies, from isolated Patch Reefs to continuous Barrier Reefs K. Marine Shelves 1. Types a. Continental ...
Review sheet – Chapter 3 Understand that the Earth is density
... equal in weight to the floating object’s own weight Understand that lithospheric plates float in the asthenosphere because of buoyancy Know the evidence for continental drift: parallelism of the shorelines (South America and Africa), discovery of coal (tropical plants) in Antarctica, similarities in ...
... equal in weight to the floating object’s own weight Understand that lithospheric plates float in the asthenosphere because of buoyancy Know the evidence for continental drift: parallelism of the shorelines (South America and Africa), discovery of coal (tropical plants) in Antarctica, similarities in ...
New constraints on the sedimentation and uplift history of the
... key Paleogene formations exposed on South Andaman. A paucity of biostratigraphic data poorly define sediment depositional ages. Constraints on timing of deposition obtained by dating detrital minerals for the Mithakhari Group indicate sedimentation after 60 Ma, possibly younger than 40 Ma. A better ...
... key Paleogene formations exposed on South Andaman. A paucity of biostratigraphic data poorly define sediment depositional ages. Constraints on timing of deposition obtained by dating detrital minerals for the Mithakhari Group indicate sedimentation after 60 Ma, possibly younger than 40 Ma. A better ...
Mode of opening of pull-‐apart basins
... ….Similar to what inferred for salt tectonics, but at the upper crust scale Ø No major distribution of extension – extension is accommodated by the main bounding listric faults Ø The ductile flow may be channeled towards the main bounding listric fault Ø What triggered this ductile flow at 2-3 Ma ...
... ….Similar to what inferred for salt tectonics, but at the upper crust scale Ø No major distribution of extension – extension is accommodated by the main bounding listric faults Ø The ductile flow may be channeled towards the main bounding listric fault Ø What triggered this ductile flow at 2-3 Ma ...
Introduction - San Francisco State University
... The Marin Headlands terrane is part of the Franciscan Complex, lying east of the San Andreas Fault and just northwest of the Golden Gate Bridge. The Franciscan Complex exposed in our study area of Marin Headlands consists of pillow basalt, radiolarian chert and shale. These rocks were created at dif ...
... The Marin Headlands terrane is part of the Franciscan Complex, lying east of the San Andreas Fault and just northwest of the Golden Gate Bridge. The Franciscan Complex exposed in our study area of Marin Headlands consists of pillow basalt, radiolarian chert and shale. These rocks were created at dif ...
SUPERPUZZLE
... magnetic minerals. Paleomagnetic studies use the minerals as tiny, time capsule compasses, which recorded the direction of the magnetic field at the time the rocks formed. The minerals can reveal information about where those rocks used to be, including their latitude relative to where the Earth’s n ...
... magnetic minerals. Paleomagnetic studies use the minerals as tiny, time capsule compasses, which recorded the direction of the magnetic field at the time the rocks formed. The minerals can reveal information about where those rocks used to be, including their latitude relative to where the Earth’s n ...