 |
|
|
|
|
|
|
|
|
|
|
|
|
| q |
During active plate tectonic processes, carbon
|
|
|
cycles constantly between Earth’s interior and its
|
|
|
|
surface.
|
|
|
| q |
The carbon moves from deep rock reservoirs to
|
|
|
the surface mainly as CO2 gas associated with
|
|
|
volcanic activity along the margins of Earth’s
|
|
|
|
tectonic plates.
|
|
|
| q |
The centerpiece of the seafloor spreading
|
|
|
hypothesis is the concept that changes in the rate
|
|
|
of seafloor spreading over millions of years
|
|
|
control the rate of delivery of CO2 to the
|
|
|
atmosphere from the large rock reservoir of
|
|
|
carbon, with the resulting changes in atmospheric
|
|
CO2 concentrations controlling Earth’s
climate.
|
|
