The ups and downs of sediments
... he development of life on Earth has been punctuated by dramatic extinction events and by periods of enhanced biodiversification. The Ordovician period (from about 489 to 443 million years ago) witnessed one of the ‘Big Five’ mass extinctions in Earth history and also one of the most important interv ...
... he development of life on Earth has been punctuated by dramatic extinction events and by periods of enhanced biodiversification. The Ordovician period (from about 489 to 443 million years ago) witnessed one of the ‘Big Five’ mass extinctions in Earth history and also one of the most important interv ...
Evidence of Plate Tectonics
... another strip of rock has reversed polarity (north pole of the rock face the south pole of the Earth) Therefore: Each strip that has a different polarity had to be formed at different time – supports sea floor spreading ...
... another strip of rock has reversed polarity (north pole of the rock face the south pole of the Earth) Therefore: Each strip that has a different polarity had to be formed at different time – supports sea floor spreading ...
la teoria della deriva dei continenti e della tettonica a zolle
... The plate tectonics theory was introduced by the scientists MORGAN & MCKENZIE. This theory explains the phenomena that are involved in the Earth’s crust changes such as the seismic activity, the orogeny, the presence of the volcanos on the territory and the formation of the oceanics trenches. ...
... The plate tectonics theory was introduced by the scientists MORGAN & MCKENZIE. This theory explains the phenomena that are involved in the Earth’s crust changes such as the seismic activity, the orogeny, the presence of the volcanos on the territory and the formation of the oceanics trenches. ...
Spanish researchers sequence the genome of global deep ocean
... microorganisms collected in the Atlantic, Indian and Pacific Oceans during the Malaspina Expedition. This collection of marine microbial genomic, the first in the world on a global scale, will provide new clues about a reservoir of biodiversity yet to explore, considering that it could imply the dis ...
... microorganisms collected in the Atlantic, Indian and Pacific Oceans during the Malaspina Expedition. This collection of marine microbial genomic, the first in the world on a global scale, will provide new clues about a reservoir of biodiversity yet to explore, considering that it could imply the dis ...
Climate Science Cheat Sheet
... Spatial warming and day to night cooling patterns are not indicative of any of the potential natural causes that have lead to warming in the past ...
... Spatial warming and day to night cooling patterns are not indicative of any of the potential natural causes that have lead to warming in the past ...
The influence of major rivers discharges on physical and biological
... (1) University of Gdańsk, Department of Physical Oceanography, Gdańsk, Poland, (2) Institute of Oceanology Polish Academy of Sciences, Department of Marine Physics, Marine Biooptics Laboratory, Sopot, Poland ...
... (1) University of Gdańsk, Department of Physical Oceanography, Gdańsk, Poland, (2) Institute of Oceanology Polish Academy of Sciences, Department of Marine Physics, Marine Biooptics Laboratory, Sopot, Poland ...
Ocean Topography
... Marine Protected Area (MPA) because of the rare corals found there & a resident population of approximately 280 Northern Bottlenose Whales. The natural gas pipeline goes right by it…problems? ...
... Marine Protected Area (MPA) because of the rare corals found there & a resident population of approximately 280 Northern Bottlenose Whales. The natural gas pipeline goes right by it…problems? ...
i Injecting CO into the Depths Fertilizing the Ocean with Nitrogen
... The Ocean Nourishment Corp. (ONC) in Australia has proposed injecting large amounts of urea—a nitrogen compound found in mammalian urine and fertilizers— into low-nitrogen seas to stimulate phytoplankton blooms and draw down excess CO2 from the air. Like land plants, phytoplankton require (along wit ...
... The Ocean Nourishment Corp. (ONC) in Australia has proposed injecting large amounts of urea—a nitrogen compound found in mammalian urine and fertilizers— into low-nitrogen seas to stimulate phytoplankton blooms and draw down excess CO2 from the air. Like land plants, phytoplankton require (along wit ...
Midterm Study Guide
... o euphotic vs. aphotic zone temperature profiles o epilimnion vs. hypolimnion o thermocline oxygen concentrations o aerobic vs. anaerobic/anoxic o B.O.D. nutrient content o oligotrophic vs. eutrophic oceans open ocean vs. coast upwelling and coastal inputs o ocean/atmosphere coupling h ...
... o euphotic vs. aphotic zone temperature profiles o epilimnion vs. hypolimnion o thermocline oxygen concentrations o aerobic vs. anaerobic/anoxic o B.O.D. nutrient content o oligotrophic vs. eutrophic oceans open ocean vs. coast upwelling and coastal inputs o ocean/atmosphere coupling h ...
Theory of Plate Tectonics
... Hot material rises while cool material sinks Cool material is dense The motion of sinking and rising material drags the tectonic plate away from mid-ocean ridge Flash Presentation ...
... Hot material rises while cool material sinks Cool material is dense The motion of sinking and rising material drags the tectonic plate away from mid-ocean ridge Flash Presentation ...
Earth Science - Lisle CUSD 202
... In the late 1800’s the British Challenger became the 1st research ship to explore below the ocean’s surface. ...
... In the late 1800’s the British Challenger became the 1st research ship to explore below the ocean’s surface. ...
SEA-FLOOR SPREADING
... SEA-FLOOR SPREADING In the 1950’s and early 1960’s detailed study of the oceans revealed the following surprising information: Detailed bathymetric (depth) studies showed that there was an extensive submarine ridge system that extended around the globe. These became known as MID-OCEAN RIDGES. Sam ...
... SEA-FLOOR SPREADING In the 1950’s and early 1960’s detailed study of the oceans revealed the following surprising information: Detailed bathymetric (depth) studies showed that there was an extensive submarine ridge system that extended around the globe. These became known as MID-OCEAN RIDGES. Sam ...
Ocean Waters and the Ocean Floor
... -In the 1960's, a lot of these products were taken out of the ocean. Now, the USA uses the Great Salt Lake as a resource rather than the ocean. -Freshwater - desalination can be a costly process, and it is a small production. -Even gold can be taken of the ocean, but the concentration is extremely l ...
... -In the 1960's, a lot of these products were taken out of the ocean. Now, the USA uses the Great Salt Lake as a resource rather than the ocean. -Freshwater - desalination can be a costly process, and it is a small production. -Even gold can be taken of the ocean, but the concentration is extremely l ...
Geoscience Day Starters
... What two things most influence the density of seawater? Salinity and gravity c. Temperature and lattitude Salinity and temperature d. Temperature and current values ...
... What two things most influence the density of seawater? Salinity and gravity c. Temperature and lattitude Salinity and temperature d. Temperature and current values ...
Theory of Plate Tectonics
... Hot material rises while cool material sinks Cool material is dense The motion of sinking and rising material drags the tectonic plate away from mid-ocean ridge Flash Presentation ...
... Hot material rises while cool material sinks Cool material is dense The motion of sinking and rising material drags the tectonic plate away from mid-ocean ridge Flash Presentation ...
Chapter 23 The Ocean Floor
... • SONAR • Sound signal is sent to the ocean floor and the time it takes to reach the ocean floor and return determines the depth ...
... • SONAR • Sound signal is sent to the ocean floor and the time it takes to reach the ocean floor and return determines the depth ...
Earth still absorbing about half carbon dioxide emissions
... The scientists analyzed 50 years of global carbon fires and some natural processes. The gas can also be pulled out of the atmosphere into the tissues of dioxide (CO2) measurements and found that the growing plants or absorbed by the waters of Earth's processes by which the planet's oceans and oceans ...
... The scientists analyzed 50 years of global carbon fires and some natural processes. The gas can also be pulled out of the atmosphere into the tissues of dioxide (CO2) measurements and found that the growing plants or absorbed by the waters of Earth's processes by which the planet's oceans and oceans ...
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.