Not exact matches
At certain subduction zones, such as those
in Cascadia, Sumatra and eastern Alaska, a thick
sediment layer overlies the subducting
oceanic plate.
With the
oceanic plate, water enters the earth as it is trapped
in minerals of the
oceanic crust or overlaying
sediments.
Carbonates are important constituents of marine
sediments and are heavily involved
in the planet's deep carbon cycle, primarily due to
oceanic crust sinking into the mantle, a process called subduction.
Substantial and correlated changes
in marine carbonate (CaCO3) content of
oceanic sediments commonly accompany the transitions from cold glacial periods to warm interglacial periods.
Anomalies
in the
oceanic carbonate system recorded
in marine
sediments at the time3, for example while coral reefs were forming, apparently left no signature on atmospheric carbon dioxide concentrations.
Researchers from the Centre for Arctic Gas Hydrate, Environment and Climate (CAGE) at the Arctic University of Norway have discovered a growing Arctic abiotic methane - and methane hydrate — charged
sediment drift on
oceanic crust
in the deep Fram Strait of the Arctic Ocean.
He uses
sediments, microfossils and geochemistry to study evidence of past and present climate change
in lake and
oceanic sediments, his CU biography states.
The CO2 pools form when one
oceanic plate buckles under another and carbonates
in the
sediment break down under the intense heat.