metamorphic sedimentary igneous weathered
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: In the Four Corners area in the US Southwest, there are large rocky outcroppings of basalt. These were formed by ancient lava flows. Using this information, what class of rock is this?
Possibilities:
- metamorphic
- sedimentary
- igneous
- weathered

igneous