I would say B is the answer to that bro
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.
As I said in your other post/question on the same topic, you have to rephrase your question in order for us to help you. =)
Hydro=water therefore hydroelectric means to use water for power. WA & Oregon are closer to water than the great planes. the answer is yes.
