Notes and Investigation
... Life on Earth nearly died out at the end of the Paleozoic Era 250 million years ago. At that time, all the continents had just come together to form a supercontinent called Pangaea, and a single superocean called Panthalassa. The global climate had warmed by several degrees, especially at the poles. ...
... Life on Earth nearly died out at the end of the Paleozoic Era 250 million years ago. At that time, all the continents had just come together to form a supercontinent called Pangaea, and a single superocean called Panthalassa. The global climate had warmed by several degrees, especially at the poles. ...
The role of phytoplankton in the carbon cycle
... The role of phytoplankton in the carbon cycle Phytoplankton have evolved over many millions of years, interacting with other organisms to produce a great diversity of lifeforms. This group is central to the oceans’ ecological and biogeochemical services, as they constitute the basis of the marine fo ...
... The role of phytoplankton in the carbon cycle Phytoplankton have evolved over many millions of years, interacting with other organisms to produce a great diversity of lifeforms. This group is central to the oceans’ ecological and biogeochemical services, as they constitute the basis of the marine fo ...
The Theory of Plate Tectonics
... Plate Tectonics • The Earth’s lithosphere is divided into plates that move on top of the asthenosphere. Lithosphere ...
... Plate Tectonics • The Earth’s lithosphere is divided into plates that move on top of the asthenosphere. Lithosphere ...
Regional phases in continental and oceanic environments
... For the basaltic oceanic crust with a thickness of about 7 km, the influence of sediments is stronger. At a given frequency, far fewer modes are supported by the crustal structure than for continents, and there is not the consistent pattern of group velocity extrema needed to create the Lg phase (Kn ...
... For the basaltic oceanic crust with a thickness of about 7 km, the influence of sediments is stronger. At a given frequency, far fewer modes are supported by the crustal structure than for continents, and there is not the consistent pattern of group velocity extrema needed to create the Lg phase (Kn ...
Pollution in the Ocean - Division on Earth and Life Studies
... to agriculture, primarily runoff of dissolved nitrogen and phosphorus from fertilizers applied to agricultural fields, golf courses, and lawns. Most of the remainder comes from sewage treatment plant discharges, septic system leaks, industrial discharges, and even deposits from the air of nitrogen r ...
... to agriculture, primarily runoff of dissolved nitrogen and phosphorus from fertilizers applied to agricultural fields, golf courses, and lawns. Most of the remainder comes from sewage treatment plant discharges, septic system leaks, industrial discharges, and even deposits from the air of nitrogen r ...
U4-T2.2-Convection and a Moving Seafloor
... If the asthenosphere is in fact moving as a result of convection, then Holmes suggested that convection could be the mechanism responsible for plate tectonics. Harry Hess was influenced by Holmes’ ideas, and suggested that deep within the asthenosphere, heated material expands, becomes less dens ...
... If the asthenosphere is in fact moving as a result of convection, then Holmes suggested that convection could be the mechanism responsible for plate tectonics. Harry Hess was influenced by Holmes’ ideas, and suggested that deep within the asthenosphere, heated material expands, becomes less dens ...
Document
... Mountain belts that are not volcanic are almost always formed by two continents colliding! Real-World Example: 50 million years ago, the tectonic plate carrying India crashed into Asia (the Eurasian Plate) leading to the formation of the Himalayan Mountains. The slow continuous convergence of the ...
... Mountain belts that are not volcanic are almost always formed by two continents colliding! Real-World Example: 50 million years ago, the tectonic plate carrying India crashed into Asia (the Eurasian Plate) leading to the formation of the Himalayan Mountains. The slow continuous convergence of the ...
I-4 Dynamic Planet Notes
... Plate boundaries where one plate dives underneath another plate The down going plate is an oceanic plate The plate that stays at the surface can be an oceanic plate or a continental plate The place where the down going plate bends downward is marked by a deep trench on the ocean floor Earthquakes an ...
... Plate boundaries where one plate dives underneath another plate The down going plate is an oceanic plate The plate that stays at the surface can be an oceanic plate or a continental plate The place where the down going plate bends downward is marked by a deep trench on the ocean floor Earthquakes an ...
The `inconvenient ocean` Undesirable consequences of terrestrial
... euphotic zone), nutrients are removed from solution and transformed into cellular constituents. , Much of this material is subsequently broken down by the action of bacteria and zooplankton within the euphotic zone, and the nutrients returned into solution. However, a fraction (in the form of dead c ...
... euphotic zone), nutrients are removed from solution and transformed into cellular constituents. , Much of this material is subsequently broken down by the action of bacteria and zooplankton within the euphotic zone, and the nutrients returned into solution. However, a fraction (in the form of dead c ...
Chapter 4 - McGraw Hill Higher Education
... environment primarily by streams and rivers that run to the seashore. Small particles are easier to transport long distances because it requires very little energy to move them. Conversely, large particles will be deposited rapidly as the velocity of the moving water carrying them decreases. Consequ ...
... environment primarily by streams and rivers that run to the seashore. Small particles are easier to transport long distances because it requires very little energy to move them. Conversely, large particles will be deposited rapidly as the velocity of the moving water carrying them decreases. Consequ ...
File
... reptile Mesosaurus. Green indicates fossils of the fern Glossopteris, found in all of the southern continents. Brown indicates fossil evidence of the Triassic land reptile Lystrosaurus. (Map courtesy United States Geological Survey) ...
... reptile Mesosaurus. Green indicates fossils of the fern Glossopteris, found in all of the southern continents. Brown indicates fossil evidence of the Triassic land reptile Lystrosaurus. (Map courtesy United States Geological Survey) ...
File
... All of these methods are based on the same principles. Energy waves are sent down to the floor are reflected and return to the surface, where they are recorded. Knowing the speed of sound, 1500 m per second, oceanographers can determine the depth. The most complete picture was gathered from info ...
... All of these methods are based on the same principles. Energy waves are sent down to the floor are reflected and return to the surface, where they are recorded. Knowing the speed of sound, 1500 m per second, oceanographers can determine the depth. The most complete picture was gathered from info ...
chapter 3 - McGraw Hill Higher Education
... - Calcareous particles are created by single-celled plants called coccolithophorids, small snails called pteropods, and amoebae-like animals called foraminifera. - Calcareous oozes are the dominant type of pelagic sediment. - The distribution of biogenous sediment is related to the distribution and ...
... - Calcareous particles are created by single-celled plants called coccolithophorids, small snails called pteropods, and amoebae-like animals called foraminifera. - Calcareous oozes are the dominant type of pelagic sediment. - The distribution of biogenous sediment is related to the distribution and ...
Chapter 4 Marine Sedimentation
... of the depositional environment. • Terrigenous sediments strongly reflect their source and are transported to the sea by wind, rivers and glaciers. • Rate of erosion is important in determining nature of sediments. ...
... of the depositional environment. • Terrigenous sediments strongly reflect their source and are transported to the sea by wind, rivers and glaciers. • Rate of erosion is important in determining nature of sediments. ...
ppt
... influence, 15º20’ - 18º30N, East Pacific Rise: Influence of axial faulting. Geochemistry Geophysics Geosystems. Volume 2. September 2004. AGU and the Geochemical Society. ...
... influence, 15º20’ - 18º30N, East Pacific Rise: Influence of axial faulting. Geochemistry Geophysics Geosystems. Volume 2. September 2004. AGU and the Geochemical Society. ...
Answers to STUDY BREAK Questions Essentials 5th Chapter 13
... 22. What adaptations contribute to the success of fishes? Seawater may seem to be an ideal habitat, but living in it does present difficulties. These most successful vertebrates have structures and behaviors to cope. Among them are adaptations of movement, shape, and propulsion. Active fish usually ...
... 22. What adaptations contribute to the success of fishes? Seawater may seem to be an ideal habitat, but living in it does present difficulties. These most successful vertebrates have structures and behaviors to cope. Among them are adaptations of movement, shape, and propulsion. Active fish usually ...
Chapter 4 Marine Sedimentation
... of the depositional environment. • Terrigenous sediments strongly reflect their source and are transported to the sea by wind, rivers and glaciers. • Rate of erosion is important in determining nature of sediments. ...
... of the depositional environment. • Terrigenous sediments strongly reflect their source and are transported to the sea by wind, rivers and glaciers. • Rate of erosion is important in determining nature of sediments. ...
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.