Climate - De Anza College
... 3 In summer, the lake regains a distinctive thermal profile, with warm surface water separated from cold bottom water by a narrow vertical zone of rapid temperature change, called a thermocline. ...
... 3 In summer, the lake regains a distinctive thermal profile, with warm surface water separated from cold bottom water by a narrow vertical zone of rapid temperature change, called a thermocline. ...
The Changing Ocean Carbon Cycle - Assets
... represents a minute part of the total carbon content in the Earth’s crust . . . it must be considered the actual motor which puts the geochemical carbon cycles in motion’. The importance of sedimentary burial of organic carbon in the evolution of Earth’s atmosphere, and the stochiometric equivalence ...
... represents a minute part of the total carbon content in the Earth’s crust . . . it must be considered the actual motor which puts the geochemical carbon cycles in motion’. The importance of sedimentary burial of organic carbon in the evolution of Earth’s atmosphere, and the stochiometric equivalence ...
Final Exam Information
... Cessation of upwelling off the Pacific coast of South America and a decline in ocean productivity in this area. Cessation of upwelling off the Pacific coast of South America and an increase in ocean productivity in this area. Increased upwelling off the Pacific coast of South America and a decline i ...
... Cessation of upwelling off the Pacific coast of South America and a decline in ocean productivity in this area. Cessation of upwelling off the Pacific coast of South America and an increase in ocean productivity in this area. Increased upwelling off the Pacific coast of South America and a decline i ...
Organic-rich Facies and Hydrocarbon Source Rocks
... oxygen minimum is rarely sufficiently intense to give anoxic conditions and enhance organic matter preservation. Oxygen contents rise below the oxigen minimum zone because deep ocean water today is supplied by cold, oxygen-rich polar waters. The oxygen content of ocean bottom-water therefore decreas ...
... oxygen minimum is rarely sufficiently intense to give anoxic conditions and enhance organic matter preservation. Oxygen contents rise below the oxigen minimum zone because deep ocean water today is supplied by cold, oxygen-rich polar waters. The oxygen content of ocean bottom-water therefore decreas ...
ocean zones - Somerset Academy
... • Abyssal plains: are the flattest areas on earth. • Ocean ridges: are long mountain ranges formed when magma seeps or erupts between pieces of the Earth’s crust (tectonic plates). • Trenches: are the deepest part of the ocean and are formed when one tectonic plate is forced under another tectonic p ...
... • Abyssal plains: are the flattest areas on earth. • Ocean ridges: are long mountain ranges formed when magma seeps or erupts between pieces of the Earth’s crust (tectonic plates). • Trenches: are the deepest part of the ocean and are formed when one tectonic plate is forced under another tectonic p ...
Chapter 11: The rise of oxygen and ozone – ppt
... oxygenic photosynthesis sunlight + CO2 + H2O organic Ccompounds + O2 anoxygenic photosynthesis sunlight + CO2 + H2N or H2 (instead of H2O) organic C-compounds + no O2! And there is cyanobacteria that can perform both!! and can switch from one to the other depending on whether H2N is there or ...
... oxygenic photosynthesis sunlight + CO2 + H2O organic Ccompounds + O2 anoxygenic photosynthesis sunlight + CO2 + H2N or H2 (instead of H2O) organic C-compounds + no O2! And there is cyanobacteria that can perform both!! and can switch from one to the other depending on whether H2N is there or ...
No Slide Title
... New basaltic crust is formed Mid-ocean ridge: volcanic mountain range which circles the earth beneath the oceans ...
... New basaltic crust is formed Mid-ocean ridge: volcanic mountain range which circles the earth beneath the oceans ...
inner core
... • In the inner core, iron and nickel are solid. • Although the inner core is very hot, pressure from the weight of the rest of the Earth doesn’t allowed the material to melt. • Iron’s normal temperature of melting is 15350C, but in the earth inner core it could stand 40000C with no melting. ...
... • In the inner core, iron and nickel are solid. • Although the inner core is very hot, pressure from the weight of the rest of the Earth doesn’t allowed the material to melt. • Iron’s normal temperature of melting is 15350C, but in the earth inner core it could stand 40000C with no melting. ...
plate_tectonics
... a) Which type of crust has a higher temperature? ______________________ b) Which type of crust has a higher composition of silica? ______________________ c) Which type of crust has a higher composition of iron? ______________________ d) Which type of crust is thicker? ______________________ ...
... a) Which type of crust has a higher temperature? ______________________ b) Which type of crust has a higher composition of silica? ______________________ c) Which type of crust has a higher composition of iron? ______________________ d) Which type of crust is thicker? ______________________ ...
Chapter 18 – The Ocean Floor Outline (NOTE NEW CHAPTER TITLE)
... a. Over 70,000 kilometers (43,000 miles) in length b. Twenty-three percent of Earth’s surface c. Winds through all major oceans 3. Along the axis of some segments are deep downfaulted structures called rift valleys 4. Consist of layer upon layer of basaltic rocks that have been faulted and uplifted ...
... a. Over 70,000 kilometers (43,000 miles) in length b. Twenty-three percent of Earth’s surface c. Winds through all major oceans 3. Along the axis of some segments are deep downfaulted structures called rift valleys 4. Consist of layer upon layer of basaltic rocks that have been faulted and uplifted ...
Ch 9 3 Actions at Plate Boundaries
... Oceanic Ridge – along well-developed divergent plate boundaries, area where seafloor is elevated The system of ridges is the longest physical feature on Earth’s surface (70,000 km long) These features are 1000 to 4000 km wide, not narrow at all Rift Valley – Deep faulted structures found along the r ...
... Oceanic Ridge – along well-developed divergent plate boundaries, area where seafloor is elevated The system of ridges is the longest physical feature on Earth’s surface (70,000 km long) These features are 1000 to 4000 km wide, not narrow at all Rift Valley – Deep faulted structures found along the r ...
F2007_311_summary_V
... CO2 concentrations would need to have been a lot higher than today – maybe even 1000x higher. What regulates atmospheric CO2 concentration? on a short-term have balance between photosynthesis and respiration+decomposition (about 60 Gt/yr) in and out of atm. on a longer-term, CO2 is regulated by exch ...
... CO2 concentrations would need to have been a lot higher than today – maybe even 1000x higher. What regulates atmospheric CO2 concentration? on a short-term have balance between photosynthesis and respiration+decomposition (about 60 Gt/yr) in and out of atm. on a longer-term, CO2 is regulated by exch ...
File
... 17. The Hawaiian hotspot has remained nearly stationary. The Pacific Plate has moved over it. Magma from the hotspot produced volcanoes (and ocean islands) within the Pacific Plate. The systematic increase of age of the Hawaiian Islands from the current location toward the northwest indicates that t ...
... 17. The Hawaiian hotspot has remained nearly stationary. The Pacific Plate has moved over it. Magma from the hotspot produced volcanoes (and ocean islands) within the Pacific Plate. The systematic increase of age of the Hawaiian Islands from the current location toward the northwest indicates that t ...
monsters of the deep
... found near underwater volcanic hot springs called hydrothermal vents, which usually occur along ridges separating the Earth’s tectonic plates. Hydrogen sulfide is abundant in the water erupting from hydrothermal vents, and is used by chemosynthetic bacteria that are the base of the vent community fo ...
... found near underwater volcanic hot springs called hydrothermal vents, which usually occur along ridges separating the Earth’s tectonic plates. Hydrogen sulfide is abundant in the water erupting from hydrothermal vents, and is used by chemosynthetic bacteria that are the base of the vent community fo ...
Seafloor Spreading
... form new ocean crust – Through time the new ocean crust moves away from the center of the mid-ocean ridge becoming cooler (and thus more dense) and sinks ...
... form new ocean crust – Through time the new ocean crust moves away from the center of the mid-ocean ridge becoming cooler (and thus more dense) and sinks ...
Carib x SGI sett.2010
... north- or south-verging fronts (Sepur Basin in Mexico-Guatemala; Foreland Basin in Cuba; Piemontine Basin in Venezuela). The proposed kinematic models seem to be based much more on unresolved problems than on recognized facts. In particular, the major disagreements currently concern: (1) the origina ...
... north- or south-verging fronts (Sepur Basin in Mexico-Guatemala; Foreland Basin in Cuba; Piemontine Basin in Venezuela). The proposed kinematic models seem to be based much more on unresolved problems than on recognized facts. In particular, the major disagreements currently concern: (1) the origina ...
OCN 201: Plate Tectonics II
... Effect of Supercontinents (Pangaea, Penotia, Rodinia) • They ride high relative to sea level because: – They were thickened by continent-continent collision as they accreted together. – They overlie thicker lithosphere. – They heat the underlying mantle (act as a blanket)… and so become thermally e ...
... Effect of Supercontinents (Pangaea, Penotia, Rodinia) • They ride high relative to sea level because: – They were thickened by continent-continent collision as they accreted together. – They overlie thicker lithosphere. – They heat the underlying mantle (act as a blanket)… and so become thermally e ...
Organization of unit 2
... International concerns regarding ozone depletion has led governments around the world to phase out the use of CFCs. Recently, CFCs have been replaced as aerosol propellants by hydrocarbons and the use of manual pressure packs. Alternative chemicals have been developed for use in refrigeration and ai ...
... International concerns regarding ozone depletion has led governments around the world to phase out the use of CFCs. Recently, CFCs have been replaced as aerosol propellants by hydrocarbons and the use of manual pressure packs. Alternative chemicals have been developed for use in refrigeration and ai ...
Anoxic event
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.