Conversation so far:
where are the rocky mountains located on a map
How long ago were the Rocky Mountains formed
The Rocky Mountains formed 80 million to 55 million years ago
What minerals can be found in the Rocky Mountains
Minerals found in the Rocky Mountains include significant deposits of copper, gold, lead, molybdenum, silver, tungsten, and zinc.

Question: What do the mountain's sedimentary basins contain
Self-contained rewrite: What do the Rocky Mountains' sedimentary basins contain