To find subject headings, try doing a Subject Search in the Library catalog by using one of the headings listed on this page. Or type your search term(s) in the Library catalog keyword search, then look at a catalog record from your results to see what subjects are used.
Suggested subject headings for this topic are:
Geology
To browse the book stacks, here are some Library of Congress call numbers on the 9th floor.
QE1-996.5 -- Geology
QE351-399.2 -- Mineralogy
QE420-499 -- Petrology
QE521-545 -- Volcanoes and earthquakes
QE701-760 -- Paleontology
QE760.8-899.2 -- Paleozoology
QE901-996.5 -- Paleobotany
The Geology collection also includes the following Library of Congress classifications:
QC801-999 -- Geophysics. Cosmic physics
GE25-199 -- Environmental Sciences (3rd floor)