The science which treats: (a) Of the structure and mineral constitution of the globe; structural geology. (b) Of its history as regards rocks, minerals, rivers, valleys, mountains, climates, life, etc.; historical geology. (c) Of the causes and methods by which its structure, features, changes, and conditions have been produced; dynamical geology. See Chart of The Geological Series.
If you want to understand geology, study earthquakes. If you want to understand the economy, study the Depression. Ben Bernanke
As in geology, so in social institutions, we may discover the causes of all past changes in the present invariable order of society. Henry David Thoreau
My only wish would be to have 10 more lives to live on this planet. If that were possible, I'd spend one lifetime each in embryology, genetics, physics, astronomy and geology. The other lifetimes would be as a pianist, backwoodsman, tennis player, or writer for the 'National Geographic.' Joseph Murray
Caves are whimsical things, and geology on a local scale is random and unpredictable. William Stone
One of the most important things about the geology on the moon is your descriptions of what you see, comparing them to things that you've seen on Earth so that the geologists and the scientists on the ground would know what you're talking about; and then take pictures of them. Eugene Cernan