If you found a sedimentary layer with a diverse fossil assemblage including phacops, mucrospirifer, chonetes, and amphibians all in the same layer, what geologic period would you assign it to? what is the range for its absolute age?

blue light is scattered in different directions by the tiny molecules of air. blue is scattered more than other colours because it has a shorter distance to travel which results in smaller waves. this is why we see a blue sky most of the time.