Travertines and Blue pools
A carbon sink is a natural or artificial reservoir that accumulates and stores some carbon-containing chemical compound for an indefinite period. The process by which carbon sinks remove carbon dioxide (CO2) from the atmosphere is known as carbon sequestration.
These wadi pools become isolated pools when the supply dries up. These white or blue, alkaline rock pools have white deposits at the bottom. The rocks are mantle peridotite, which reacts with CO2 to form white carbonates.
Peridotite is found in Oman and a lot of other places, but basalt is more common: Two-thirds of the rocks on Earth are basaltic, and the whole ocean floor is basalt. Reactivity with CO2 is faster in mantle peridotite, but if you want to inject large volumes of dissolved CO2 then you need pore space in the rocks. Basalt has a much higher porosity than peridotite.
Reference: http://www.slate.com/articles/health_and_science/new_scientist/2014/07/carbfix_co2_storage_project_mineralize_carbon_dioxide_into_carbonates_to.html
These wadi pools become isolated pools when the supply dries up. These white or blue, alkaline rock pools have white deposits at the bottom. The rocks are mantle peridotite, which reacts with CO2 to form white carbonates.
Peridotite is found in Oman and a lot of other places, but basalt is more common: Two-thirds of the rocks on Earth are basaltic, and the whole ocean floor is basalt. Reactivity with CO2 is faster in mantle peridotite, but if you want to inject large volumes of dissolved CO2 then you need pore space in the rocks. Basalt has a much higher porosity than peridotite.
Reference: http://www.slate.com/articles/health_and_science/new_scientist/2014/07/carbfix_co2_storage_project_mineralize_carbon_dioxide_into_carbonates_to.html
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