geology是什么意思？

The letter was written by Darwin to thank an American geologist, Dr.Ferdinand Vandeveer Hayden, for sending him copies of his research into the geology of the region that would become Yellowstone National Park.

Very few of them knew much about geology.

Juan Louis, a junior geology major, decided to give an informative speech about how earthquakes occur

From his audience and analysis he learned that only 2 or 3 of his classmates knew much of anything about geology.

To be absolutely safe, Juan asked his roommate, who was not a geology major, to listen to the speech