Seafloor spreading occurs along mid ocean ridges large mountain ranges rising from the ocean floor.
Sea floor spreading rate hypothesis and co2.
During plate tectonics carbon is cycled endlessly between the earth s.
Spreading rates determine if the ridge is fast intermediate or slow.
The seafloor spreading theory is one hypothesis introduced to suggest a mechanism of controlled co2 levels in the atmosphere causing the observed variations between warm co2 rich greenhouse intervals and cold co2 depleted global cooling intervals.
This idea played a pivotal role in the development of the theory of plate tectonics which revolutionized geologic thought during the last quarter of the 20th century.
Spreading rate is the rate at which an ocean basin widens due to seafloor spreading.
Blag spreading rate hypothesis robert berner antonio lasaga robert garrels 1983 sea floor spreading volcanic activity co2 input age of sea floor 100 ma now blag hypothesis.
The rate at which new oceanic lithosphere is added to each tectonic plate on either side of a mid ocean ridge is the spreading half rate and is equal to half of the spreading rate.
Tectonic control of co2.
Blag hypothesis or spreading rate hypothesis climate changes have been driven mainly by changes in the rate of co2 input to the atmosphere and ocean by plate tectonic processes.
These age data also allow the rate of seafloor spreading to be determined and they show that rates.
This theory focuses the control of co2 levels on plate tectonic processes.
During plate tectonics carbon is cycled endlessly between the earth s.
The seafloor spreading theory is one hypothesis introduced to suggest a mechanism of controlled co2 levels in the atmosphere causing the observed variations between warm co2 rich greenhouse intervals and cold co2 depleted global cooling intervals.
As upwelling of magma continues the plates continue to diverge a process known as seafloor spreading samples collected from the ocean floor show that the age of oceanic crust increases with distance from the spreading centre important evidence in favour of this process.
Sea floor spreading volcanic activity co2 increase co2 change in the last 100 myr.
Hypothesis 1 blag hypothesis.
Seafloor spreading theory that oceanic crust forms along submarine mountain zones known collectively as the mid ocean ridge system and spreads out laterally away from them.
