PGC-Abstract_CParkin
... with the strike line parallel and coincident with magnetic anomaly 20 (44Ma). This OBS array was then overshot using a 6000 cu inch, low frequency, broadband airgun source designed to optimise seismic penetration at long-offsets and wide-angles. Magnetics, bathymetry and gravity data were acquired a ...
... with the strike line parallel and coincident with magnetic anomaly 20 (44Ma). This OBS array was then overshot using a 6000 cu inch, low frequency, broadband airgun source designed to optimise seismic penetration at long-offsets and wide-angles. Magnetics, bathymetry and gravity data were acquired a ...
IM_chapter9 Seafloor
... used as fuel, and thousands of gigatons of methane are located in the oceans, equal to the world’s total amount of coal. The technology for mining and harnessing this abundant energy source has not yet been developed, but methane hydrates are enormously interesting to fuel companies. However, accord ...
... used as fuel, and thousands of gigatons of methane are located in the oceans, equal to the world’s total amount of coal. The technology for mining and harnessing this abundant energy source has not yet been developed, but methane hydrates are enormously interesting to fuel companies. However, accord ...
Seawater Properties - Marine Biology Honors
... ocean is 35 ‰ or 35 parts per thousand. • Salinity is also expressed in grams/liter. • Changes in salinity are controlled by the addition (rain or snow) or removal (evaporation or freezing) of pure water. ...
... ocean is 35 ‰ or 35 parts per thousand. • Salinity is also expressed in grams/liter. • Changes in salinity are controlled by the addition (rain or snow) or removal (evaporation or freezing) of pure water. ...
PPT
... happens when sea level falls? (negative feed-back – polar ice forming) What happens when deep water warms? (positive feed-back – less CO2 in water) Both effects liberate gas hydrates (CH4), which combines with O2 to form CO2, ultimately reaching the atmosphere ...
... happens when sea level falls? (negative feed-back – polar ice forming) What happens when deep water warms? (positive feed-back – less CO2 in water) Both effects liberate gas hydrates (CH4), which combines with O2 to form CO2, ultimately reaching the atmosphere ...
Name - MIT OpenCourseWare
... BONUS (2 points): What is the “Keeling Curve” and why is it significant? The Keeling Curve shows atmospheric carbon dioxide concentrations since 1958 measured at Mauna Loa Observatory. It was the first significant evidence of rapidly increasing carbon dioxide levels in the atmosphere. BONUS (2 point ...
... BONUS (2 points): What is the “Keeling Curve” and why is it significant? The Keeling Curve shows atmospheric carbon dioxide concentrations since 1958 measured at Mauna Loa Observatory. It was the first significant evidence of rapidly increasing carbon dioxide levels in the atmosphere. BONUS (2 point ...
Practical 3 - Tectonic forces 1 Slab pull and viscosity of the
... Combine equations 1 and 2 to express the density difference between of the oceanic lithosphere and the mantle using the temperature profile of the oceanic lithosphere predicted by the half-space cooling model. 4. One of the properties of the error function is that Z ∞ ...
... Combine equations 1 and 2 to express the density difference between of the oceanic lithosphere and the mantle using the temperature profile of the oceanic lithosphere predicted by the half-space cooling model. 4. One of the properties of the error function is that Z ∞ ...
MB Chapter 02
... Plate Boundaries and Geologic Processes • The lithosphere is fragmented into fourteen major tectonic plates • Plates are moving across the Earth's surface in different directions and at different velocities. • Many geologic processes, such as plutonism, volcanism, and earthquakes result from the in ...
... Plate Boundaries and Geologic Processes • The lithosphere is fragmented into fourteen major tectonic plates • Plates are moving across the Earth's surface in different directions and at different velocities. • Many geologic processes, such as plutonism, volcanism, and earthquakes result from the in ...
Plate Tectonics Lecture Notes Page
... Lithosphere: outer rigid shell of EarthAsthenosphere: warmer, melted (flowing) layer of upper mantle Continental crust floats on melted layers The Lithosphere is Moving! Moving plates can cause Earthquakes Early Evidence: •Some saw that continents fit together like a puzzle •Da Vinci (1400’s) F. Bac ...
... Lithosphere: outer rigid shell of EarthAsthenosphere: warmer, melted (flowing) layer of upper mantle Continental crust floats on melted layers The Lithosphere is Moving! Moving plates can cause Earthquakes Early Evidence: •Some saw that continents fit together like a puzzle •Da Vinci (1400’s) F. Bac ...
Where in the World was Lystrosaurus
... 8. Continental drift was not widely accepted when it was first proposed because ____. 1.Wegener couldn’t explain why or how the continents moved 2.continental landmasses were too big to move slowly over Earth’s surface 3.magnetic and sonar data proved that Wegener’s hypothesis was incorrect 4.mantle ...
... 8. Continental drift was not widely accepted when it was first proposed because ____. 1.Wegener couldn’t explain why or how the continents moved 2.continental landmasses were too big to move slowly over Earth’s surface 3.magnetic and sonar data proved that Wegener’s hypothesis was incorrect 4.mantle ...
GUADALUPE ISLAND -- For the flrst tlme in hlstory, man hag drÍlling
... practÍ.cabllity of drilting into the deep ocean floor to-a greaten depth than nan has ever gone before. Years may be r_equl.reat !o evãLuate fully the significance of thi.s achievement but we already have spectacular evid.ence that science now has a remarkable new means for dÍscovery. nFor the first ...
... practÍ.cabllity of drilting into the deep ocean floor to-a greaten depth than nan has ever gone before. Years may be r_equl.reat !o evãLuate fully the significance of thi.s achievement but we already have spectacular evid.ence that science now has a remarkable new means for dÍscovery. nFor the first ...
Chapter 5 Atoms to Minerals
... How and Where Volcanoes Form The term volcano refers to both the opening that the lava escapes from and the landform that develops around this opening. ...
... How and Where Volcanoes Form The term volcano refers to both the opening that the lava escapes from and the landform that develops around this opening. ...
Chapter 5: The Biogeochemical Cycles
... do not have a gaseous phase. Elements with a gas phase can be returned to ecosystem rapidly. • Annual input of S 10x that of Ca • Ca more likely to be a limiting factor ...
... do not have a gaseous phase. Elements with a gas phase can be returned to ecosystem rapidly. • Annual input of S 10x that of Ca • Ca more likely to be a limiting factor ...
Earthquakes PPT
... EITHER SIDE. When the MOVEMENT is SUDDEN, the ENERGY released causes an EARTHQUAKE. ...
... EITHER SIDE. When the MOVEMENT is SUDDEN, the ENERGY released causes an EARTHQUAKE. ...
We learned that the average age of oceanic crust is 55 million years
... between two continental plates. The location where the sinking of a plate occurs is called a subduction zone. The trenches in the deepest parts of the ocean floor are created by subduction. This is a result of oceanic-continental convergence. Also, volcanic activity occurs as a result of oceanic con ...
... between two continental plates. The location where the sinking of a plate occurs is called a subduction zone. The trenches in the deepest parts of the ocean floor are created by subduction. This is a result of oceanic-continental convergence. Also, volcanic activity occurs as a result of oceanic con ...
Sonar (stands for Sound Navigation and Ranging)
... • Continues until it begins to slope more steeply downward • Depth can reach 200 meters • This is what you walk on at the beach. ...
... • Continues until it begins to slope more steeply downward • Depth can reach 200 meters • This is what you walk on at the beach. ...
Plate Tectonics
... -Fossils of same plant & animal species found on opposite sides of oceans. -Same types of rocks & layers found on coasts on opposite sides of oceans. -Evidence of same climactic conditions on several continents. ...
... -Fossils of same plant & animal species found on opposite sides of oceans. -Same types of rocks & layers found on coasts on opposite sides of oceans. -Evidence of same climactic conditions on several continents. ...
21.1 Study guide
... The surface of the ocean is heated by absorbing infrared radiation from the sun The equator receives more direct radiation and so the ocean waters are warmer than the waters further from the equator Because the sun can only penetrate a few hundred meters of ocean water ...
... The surface of the ocean is heated by absorbing infrared radiation from the sun The equator receives more direct radiation and so the ocean waters are warmer than the waters further from the equator Because the sun can only penetrate a few hundred meters of ocean water ...
Chemical and Physical Structures of the Ocean
... water if the higher salinity water is sufficiently warm and the lower salinity water sufficiently cold. – 4. Pycnocline is a layer within the water column where water density changes rapidly with depth. ...
... water if the higher salinity water is sufficiently warm and the lower salinity water sufficiently cold. – 4. Pycnocline is a layer within the water column where water density changes rapidly with depth. ...
Marine Biome - hrsbstaff.ednet.ns.ca
... From 200 m down to around 1,000 m (3,281 ft) Also known as the middle pelagic or twilight zone • some light penetrates this deep but it is insufficient for photosynthesis • at about 500 m the water becomes depleted of oxygen • some creatures living in the mesopelagic zone will rise to the epipelagic ...
... From 200 m down to around 1,000 m (3,281 ft) Also known as the middle pelagic or twilight zone • some light penetrates this deep but it is insufficient for photosynthesis • at about 500 m the water becomes depleted of oxygen • some creatures living in the mesopelagic zone will rise to the epipelagic ...
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.