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Igneous Rocks - VarsityField
... If you were to drill a hole through the crust of a midmid-ocean ridge, what intrusive or extrusive igneous rocks might you expect to encounter at or near the surface? What intrusive or extrusive igneous rocks might you expect at the base of the crust? Water is abundant in the sedimentary rocks and o ...
... If you were to drill a hole through the crust of a midmid-ocean ridge, what intrusive or extrusive igneous rocks might you expect to encounter at or near the surface? What intrusive or extrusive igneous rocks might you expect at the base of the crust? Water is abundant in the sedimentary rocks and o ...
Large Igneous Provinces, Delamination, and Fertile Mantle
... The challenge is to find mechanisms that can explain the volume of basalt, the uplift history, and the ubiquitous evidence for involvement of both continental and mid-ocean ridge material in LIP magmas. Some igneous provinces are built on top of rafted pieces of microcontinents or abandoned island a ...
... The challenge is to find mechanisms that can explain the volume of basalt, the uplift history, and the ubiquitous evidence for involvement of both continental and mid-ocean ridge material in LIP magmas. Some igneous provinces are built on top of rafted pieces of microcontinents or abandoned island a ...
Examining the global record of interannual variability in
... the past decade, due in part to greater radiative heating at the surface [Levitus et al., 2009; von Schuckmann et al., 2009; von Schuckmann and Le Traon, 2011). The spatial representativeness of this global, negative stratification trend is evidenced by its persistence when the calculation is repeate ...
... the past decade, due in part to greater radiative heating at the surface [Levitus et al., 2009; von Schuckmann et al., 2009; von Schuckmann and Le Traon, 2011). The spatial representativeness of this global, negative stratification trend is evidenced by its persistence when the calculation is repeate ...
IMOS National Reference Station (NRS) Network
... AODN portal with ‘marine geo’ base layer, and coastal waters and 200 metre layers from GA added in. ...
... AODN portal with ‘marine geo’ base layer, and coastal waters and 200 metre layers from GA added in. ...
Site 398 : Evolution of the west iberian passive continental margin in
... white indurated limestone of late Hauterivian to early Barremian age. The white indurated limestones were deposited under pelagic conditions, whereas marlstones and siltstones could have been emplaced by low-density turbidity currents in a quiet-water environment. LimeStones were deposited above the ...
... white indurated limestone of late Hauterivian to early Barremian age. The white indurated limestones were deposited under pelagic conditions, whereas marlstones and siltstones could have been emplaced by low-density turbidity currents in a quiet-water environment. LimeStones were deposited above the ...
- University of Cambridge
... ABSTR AC T. Hothouse climates in Earth’s geologic past, such as the Eocene epoch, are thought to have been caused by the release of large amounts of carbon dioxide and/or methane, which had been stored as carbon in biogenic gases and organic matter in sediments, to the ocean-atmosphere system. Howe ...
... ABSTR AC T. Hothouse climates in Earth’s geologic past, such as the Eocene epoch, are thought to have been caused by the release of large amounts of carbon dioxide and/or methane, which had been stored as carbon in biogenic gases and organic matter in sediments, to the ocean-atmosphere system. Howe ...
MS Plate Tectonics
... Fossils of the seed fern Glossopteris are found across all of the southern continents. These seeds are too heavy to be carried across the ocean by wind. Mesosaurus fossils are found in South America and South Africa. Mesosaurus could swim, but only in fresh water. Cynognathus and Lystrosaurus were r ...
... Fossils of the seed fern Glossopteris are found across all of the southern continents. These seeds are too heavy to be carried across the ocean by wind. Mesosaurus fossils are found in South America and South Africa. Mesosaurus could swim, but only in fresh water. Cynognathus and Lystrosaurus were r ...
Geosphere - Squarespace
... The Cretaceous to early Paleogene (ca. 140–50 Ma) was characterized by a greenhouse baseline climate, driven by elevated concentrations of atmospheric CO2 . Hypotheses for the elevated CO2 concentrations invoke an increase in volcanic CO2 production due to higher oceanic crust production rates, high ...
... The Cretaceous to early Paleogene (ca. 140–50 Ma) was characterized by a greenhouse baseline climate, driven by elevated concentrations of atmospheric CO2 . Hypotheses for the elevated CO2 concentrations invoke an increase in volcanic CO2 production due to higher oceanic crust production rates, high ...
weathering - Valhalla High School
... • Masses of rock do not weather uniformly due to regional factors and composition. • Results in many unusual and spectacular rock formations and landforms ...
... • Masses of rock do not weather uniformly due to regional factors and composition. • Results in many unusual and spectacular rock formations and landforms ...
Testimony By Admiral James D. Watkins, U.S. Navy (Retired)
... virtually everywhere along the shores of the United States and its territories. Over half of the U.S. population lives in coastal watersheds, and more than 37 million people and 19 million homes have been added to coastal areas during the last three decades, driving up real estate values and requiri ...
... virtually everywhere along the shores of the United States and its territories. Over half of the U.S. population lives in coastal watersheds, and more than 37 million people and 19 million homes have been added to coastal areas during the last three decades, driving up real estate values and requiri ...
Blue natural capital:towards a new economy
... cold water corals, and close to 200 species of fish with a commercial value. These ecosystems provide key services such as Carbon sequestration, marine traffic corridors for over 50% of the European merchant fleet, and generation of pharmaceutical components by organisms living in extreme conditions ...
... cold water corals, and close to 200 species of fish with a commercial value. These ecosystems provide key services such as Carbon sequestration, marine traffic corridors for over 50% of the European merchant fleet, and generation of pharmaceutical components by organisms living in extreme conditions ...
Wegener Reading [Biography]
... toward unveiling the state of our planet in earlier times, and that the truth of the matter can only be reached by combing all this evidence. . . It is only by combing the information furnished by all the earth sciences that we can hope to determine 'truth' here, that is to say, to find the picture ...
... toward unveiling the state of our planet in earlier times, and that the truth of the matter can only be reached by combing all this evidence. . . It is only by combing the information furnished by all the earth sciences that we can hope to determine 'truth' here, that is to say, to find the picture ...
Workshop Brochure
... The Joint International Workshop of OCCOS and CHOICE-C will bring together expertise and successful experience from the first international workshop of OCCOS (Ocean and Climate Changes Observed from Space) held in Dec. 2008 and the first international workshop on coastal ocean carbon cycling in Mar. ...
... The Joint International Workshop of OCCOS and CHOICE-C will bring together expertise and successful experience from the first international workshop of OCCOS (Ocean and Climate Changes Observed from Space) held in Dec. 2008 and the first international workshop on coastal ocean carbon cycling in Mar. ...
Impact origin for the greater Ontong Java Plateau?
... Received 21 May 2003; received in revised form 14 October 2003; accepted 24 October 2003 ...
... Received 21 May 2003; received in revised form 14 October 2003; accepted 24 October 2003 ...
Upper Arctic Ocean water masses harbor distinct
... Abstract. The ubiquity of heterotrophic flagellates (HFL) in marine waters has been recognized for several decades, but the phylogenetic diversity of these small (ca. 0.8–20 µm cell diameter), mostly phagotrophic protists in the upper pelagic zone of the ocean is underappreciated. Community composit ...
... Abstract. The ubiquity of heterotrophic flagellates (HFL) in marine waters has been recognized for several decades, but the phylogenetic diversity of these small (ca. 0.8–20 µm cell diameter), mostly phagotrophic protists in the upper pelagic zone of the ocean is underappreciated. Community composit ...
Decadal variability of the thermohaline circulation.
... temperatures of the northern Atlantic with comparable latitudes of the Pacific; the former are 4-5˚C warmer. It is thus plausible that variations of the thermohaline circulation could lead to multi-year sea surface temperature (SST) anomalies in the subpolar North Atlantic; this was first suggested ...
... temperatures of the northern Atlantic with comparable latitudes of the Pacific; the former are 4-5˚C warmer. It is thus plausible that variations of the thermohaline circulation could lead to multi-year sea surface temperature (SST) anomalies in the subpolar North Atlantic; this was first suggested ...
Get PDF - Wiley Online Library
... Ocean and South Atlantic have a more radiogenic Nd isotopic composition (εNd ~ 8 to 9) (Figure 2). In the present day, those southern-sourced waters intrude into the South Atlantic above and below NADW as AAIW and AABW, respectively. Antarctic Intermediate Water can be traced into the equatorial Atl ...
... Ocean and South Atlantic have a more radiogenic Nd isotopic composition (εNd ~ 8 to 9) (Figure 2). In the present day, those southern-sourced waters intrude into the South Atlantic above and below NADW as AAIW and AABW, respectively. Antarctic Intermediate Water can be traced into the equatorial Atl ...
Plate tectonic controls on atmospheric CO2 levels since the Triassic
... olcanism forms the most efficient mechanism to transfer carbon (C) from the mantle to the ocean–atmosphere system, the exogenic reservoir. At midocean ridges, mantle upwelling occurs between two diverging plates. At subduction zones, sinking oceanic plates lead to arc volcanism (1). A third type of ...
... olcanism forms the most efficient mechanism to transfer carbon (C) from the mantle to the ocean–atmosphere system, the exogenic reservoir. At midocean ridges, mantle upwelling occurs between two diverging plates. At subduction zones, sinking oceanic plates lead to arc volcanism (1). A third type of ...
Continental arc–island arc fluctuations, growth of crustal carbonates
... The Cretaceous to early Paleogene (ca. 140–50 Ma) was characterized by a greenhouse baseline climate, driven by elevated concentrations of atmospheric CO2 . Hypotheses for the elevated CO2 concentrations invoke an increase in volcanic CO2 production due to higher oceanic crust production rates, high ...
... The Cretaceous to early Paleogene (ca. 140–50 Ma) was characterized by a greenhouse baseline climate, driven by elevated concentrations of atmospheric CO2 . Hypotheses for the elevated CO2 concentrations invoke an increase in volcanic CO2 production due to higher oceanic crust production rates, high ...
Chapter 14 - apel slice
... A steady incline marks the continental slope. Continental slopes in the Pacific Ocean are steeper than those in the Atlantic Ocean. Note: Because the vertical scale is exaggerated, the continental slope in this illustration appears steeper than it really is. Continental Shelf This gradually sloping ...
... A steady incline marks the continental slope. Continental slopes in the Pacific Ocean are steeper than those in the Atlantic Ocean. Note: Because the vertical scale is exaggerated, the continental slope in this illustration appears steeper than it really is. Continental Shelf This gradually sloping ...
Anoxic event
![](https://commons.wikimedia.org/wiki/Special:FilePath/Aquatic_Dead_Zones.jpg?width=300)
Oceanic anoxic events or anoxic events (Anoxia conditions) refer to intervals in the Earth's past where portions of oceans become depleted in oxygen (O2) at depths over a large geographic area. During some of these events, euxinia develops - euxinia refers to anoxic waters that contain H2S hydrogen sulfide. Although anoxic events have not happened for millions of years, the geological record shows that they happened many times in the past. Anoxic events coincide with several mass extinctions and may contribute to these events. These mass extinctions include some that geobiologists use as time markers in biostratigraphic dating. It is believed oceanic anoxic events are strongly linked to slowing of ocean circulation, climatic warming and elevated levels of greenhouse gases. Enhanced volcanism (through the release of CO2 and other greenhouse gases) is the proposed central external trigger for the development of these events.