Question

geologist discovered that the largest coal deposits were formed around 300 million years ago. How did this observation support the theory of plate tectonics?

Answer 1

Around that time, those regions were located in tropical climates that were partially submerged on the coasts.

Answer 2

Around that time, "those regions were located in tropical climates" that were "partially submerged" on the coasts.

Step-by-step explanation:

• 300 million years ago from now, the mean sea level was higher than what it is today. Hence, the oceans had a larger spread on the continental land.

• The tectonic plate movements decreased the mean sea levels drastically and the ocean waters thus shrunk back far backward horizontally.

• This backward descend of the ocean waters exposed the coal deposits.