Answer:
B. Aerobic bottom water
D. High organic productivity in the overlying oxygen rich water
Explanation:
A Shale is a sedimentary rock usually formed from silt and clay-size mineral. There are different colors of Shale. The Black Shale is formed under anaerobic conditions. This means that oxygen is deficient in the water where the Shale forms.
A little amount of organic materials is required for the formation of Black Shale and because Black Shale is formed in an environment lacking oxygen, an oxygen-rich water would not be necessary for its growth. Sediments are necessary in the formation of Black Shale.
Answer:
how old the star is
Explanation:
because starts existed before any human beings walked the earth
hope i helped
The answers is B.) Large number of Africans we’re forcibly taken to American during the slave trade .
I believe that would be emigrate
4. Would be A
5. Would be D
I hope this helped you :)
