What does the appearance of red beds in the geologic record indicate about the atmosphere?


The atmosphere was oxidizing.

Environmental & Atmospheric Sciences

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Places on Earth that are both biologically rich and deeply threatened by human activities are known as __________ __________, which scientists believe deserve immediate attention for study and conservation

Fill in the blank(s) with correct word

Environmental & Atmospheric Sciences

Which of the following is not an environment of metamorphism?

A) Contact with a hot magma body B) Hot fluids coming off a diaper C) Slow cooling of a magma D) High pressure in a subduction zone

Environmental & Atmospheric Sciences

How many semipermanent highs typically exist in the southern hemisphere in January?

A. 7 B. 5 C. 3 D. 2

Environmental & Atmospheric Sciences

How long is it estimated to take the ocean's volume of water to circulate through the oceanic crust at spreading centers?

A) 1 million years B) 10 million years C) 100 million years D) None of these choices

Environmental & Atmospheric Sciences