CHAPTER 13 THE OCEAN FLOOR
... Sand-sized grains settle near shore. Very small particles may be carried for 1000s of km by ocean currents. The rate at which sediment accumulates on the deep ocean floor is very slow. It may take 5000-50,000 yrs to form 1 cm layer. ...
... Sand-sized grains settle near shore. Very small particles may be carried for 1000s of km by ocean currents. The rate at which sediment accumulates on the deep ocean floor is very slow. It may take 5000-50,000 yrs to form 1 cm layer. ...
Earth Science
... Ocean - once had a warm climate – tropical plants found – island was close to the equator about 300 million years ago, then moved ...
... Ocean - once had a warm climate – tropical plants found – island was close to the equator about 300 million years ago, then moved ...
Ocean Bathymetry and Plate Tectonics
... at the ridge axes recycles the entire volume of the ocean in just a few million years and delivers nutrients for transient biological communities on the seafloor. Scientists believe that life originated in these hydrothermal environments and that hydrothermal circulation is critical for maintaining ...
... at the ridge axes recycles the entire volume of the ocean in just a few million years and delivers nutrients for transient biological communities on the seafloor. Scientists believe that life originated in these hydrothermal environments and that hydrothermal circulation is critical for maintaining ...
The History of Life on Earth
... • Fossils from successive ages reveal patterns – particular fossil types are found in rocks of the same age – new types of organisms appear sequentially in younger rock layers – types of organisms in shallower (younger) layers more closely resemble extant organisms – the appearance of new types of o ...
... • Fossils from successive ages reveal patterns – particular fossil types are found in rocks of the same age – new types of organisms appear sequentially in younger rock layers – types of organisms in shallower (younger) layers more closely resemble extant organisms – the appearance of new types of o ...
Hypoxia or “Dead Zones” in Aquatic Systems
... Crates stratification Results in anoxic conditions in more dense waters ...
... Crates stratification Results in anoxic conditions in more dense waters ...
Microbial Food Webs - Cornell Geological Sciences
... recyclers in eutrophic waters versus a direct trophic link in oligotrophic waters derives solely from the concept that the dominant cell size in the phytoplankton community shifts to smaller forms as nutrient concentration is reduced ...
... recyclers in eutrophic waters versus a direct trophic link in oligotrophic waters derives solely from the concept that the dominant cell size in the phytoplankton community shifts to smaller forms as nutrient concentration is reduced ...
Ocean Landforms - Net Start Class
... floor. They are the flattest, most featureless areas on Earth. These flat abyssal plains occur at depths of over 6,500 ft (1,980 m) below sea level. Back to Map ...
... floor. They are the flattest, most featureless areas on Earth. These flat abyssal plains occur at depths of over 6,500 ft (1,980 m) below sea level. Back to Map ...
Unit B: Earth Systems
... SC.912.L.17.10Diagram and explain the biogeochemical cycles of an How does plate movement shape the earth’s ecosystem, including water, carbon, and nitrogen cycle. ...
... SC.912.L.17.10Diagram and explain the biogeochemical cycles of an How does plate movement shape the earth’s ecosystem, including water, carbon, and nitrogen cycle. ...
Convection current
... • Most divergent boundaries occur along a midocean ridge where sea-floor spreading occurs. ...
... • Most divergent boundaries occur along a midocean ridge where sea-floor spreading occurs. ...
Slide 1
... between the continental and oceanic crusts. The slope often has deep channels cut into them. These occur at time when the world’s oceans are low and rivers cut deeply into the exposed sediment. Sometimes large underwater landslides occur here that ...
... between the continental and oceanic crusts. The slope often has deep channels cut into them. These occur at time when the world’s oceans are low and rivers cut deeply into the exposed sediment. Sometimes large underwater landslides occur here that ...
Earth Systems:
... regions, with the average surface temperature being _____°C. • Ocean water temperatures, however, decrease significantly with depth. • Deep ocean water is always ______, even in tropical oceans. It ranges from 0°C to 3°C. • Beneath roughly 100 m, temperatures decrease continuously with depth to arou ...
... regions, with the average surface temperature being _____°C. • Ocean water temperatures, however, decrease significantly with depth. • Deep ocean water is always ______, even in tropical oceans. It ranges from 0°C to 3°C. • Beneath roughly 100 m, temperatures decrease continuously with depth to arou ...
Theory of PLATE TECTONICS
... • The crustal (lithospheric) plates typically contain oceanic and continental crust. • As the plates move, they can separate, collide, or slide past one another. • This results in three kinds of plate boundaries animations 1. Divergent -apart 2. Convergent-together 3. Transform-slide side by side • ...
... • The crustal (lithospheric) plates typically contain oceanic and continental crust. • As the plates move, they can separate, collide, or slide past one another. • This results in three kinds of plate boundaries animations 1. Divergent -apart 2. Convergent-together 3. Transform-slide side by side • ...
Key concepts
... -know that turbidity currents formed submarine canyons -know what oceanic ridges are and the process occurring at them (including occurrence of transform faults) -be able to describe the formation of hydrothermal vents & why organisms are able to survive near them (chemosynthesis by bacteria) -be ab ...
... -know that turbidity currents formed submarine canyons -know what oceanic ridges are and the process occurring at them (including occurrence of transform faults) -be able to describe the formation of hydrothermal vents & why organisms are able to survive near them (chemosynthesis by bacteria) -be ab ...
Final Exam Practice 3
... 23 Since the 1900s, the human population has increased in Florida. As a result, much of the fresh water that . had previously made its way to the Everglades has been diverted for human use. ...
... 23 Since the 1900s, the human population has increased in Florida. As a result, much of the fresh water that . had previously made its way to the Everglades has been diverted for human use. ...
Plate Tectonics and Climate— Episodes of Extensive Glaciation and
... and release it in winter. Therefore, the thermal inertia of the oceans tends to moderate the role of the seasonal cycle of insolation. The range of summer or winter temperatures could influence whether or not snow accumulated in the winter or melted in the summer. Again, in this example, the distrib ...
... and release it in winter. Therefore, the thermal inertia of the oceans tends to moderate the role of the seasonal cycle of insolation. The range of summer or winter temperatures could influence whether or not snow accumulated in the winter or melted in the summer. Again, in this example, the distrib ...
Semester 1 Review - Lemon Bay High School
... 37. The continental ___________ is the steeper region of a continental margin. 38. The age of the rock at spreading centers becomes ____________ with distance from the center. 39. What are bonds that are formed by the sharing of paired electrons? 40. The _____ of water allows individual water molecu ...
... 37. The continental ___________ is the steeper region of a continental margin. 38. The age of the rock at spreading centers becomes ____________ with distance from the center. 39. What are bonds that are formed by the sharing of paired electrons? 40. The _____ of water allows individual water molecu ...
SOL 5.6 Interrelationships in Earth/Space Systems (Oceans)
... gets dimmer and dimmer. This makes the deep ocean darker and darker. Sunlight also helps warm the upper layers of the ocean. As you go deeper into the dark parts of the ocean, it also becomes colder and colder. Water has weight. The deeper you go in the ocean, the more water is pressing down on you. ...
... gets dimmer and dimmer. This makes the deep ocean darker and darker. Sunlight also helps warm the upper layers of the ocean. As you go deeper into the dark parts of the ocean, it also becomes colder and colder. Water has weight. The deeper you go in the ocean, the more water is pressing down on you. ...
Click here for the "PHET Simulation - Plate
... Directions: The Earth is extremely dynamic! From the water cycle to the rock cycle, much of the Earth is always in motion. Much like a puzzle, the Earth is composed of numerous tectonic plates, each of which moves in a unique direction at unique rates. Throughout this activity, explore plate tectoni ...
... Directions: The Earth is extremely dynamic! From the water cycle to the rock cycle, much of the Earth is always in motion. Much like a puzzle, the Earth is composed of numerous tectonic plates, each of which moves in a unique direction at unique rates. Throughout this activity, explore plate tectoni ...
Section 17.2 Seafloor Spreading
... How did drilling samples show that sea-floor spreading really has taken place? ...
... How did drilling samples show that sea-floor spreading really has taken place? ...
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.