Author Question: Explain how various leaders of the Near Abroad have dealt with Russia since the fall of the Soviet ... (Read 56 times)

codyclark · **on:** Jul 14, 2018

Explain how various leaders of the Near Abroad have dealt with Russia since the fall of the Soviet Union.

What will be an ideal response?

Question 2

What types of geologic evidence are used to study the rise of atmospheric O2?

What will be an ideal response?

jaaaaaaa · **Reply #1 on:** Jul 14, 2018

Answer to Question 1

Answers should mention each country and leaders such as Lukashenko, Yushchenko, Yanukovich, Aliyev.

Answer to Question 2

There are a number of pieces of evidence used to study the rise of atmospheric O2. The presence of banded iron formations, the existence of detrital uraninite and pyrite, the prevalence of mass-independent sulfur isotope fractionation, the absence of redbeds, and the loss of Fe during weathering of paleosols all indicate low atmospheric O2 prior to 2.3Ga. The most convincing evidence is the preservation of mass-independent sulfur isotope fractionation, for which no other adequate explanation has been put forth.