Geology is the study of the Earth. This scientific study includes how the Earth was formed, how the Earth has changed since it was formed, that materials that make up the earth, and understanding the processes that act on it.
You may know that the oceans cover about 70 percent of the Earth's surface, and that about 97 percent of all water on and in the Earth is saline—there's a lot of salty water on our planet
The USGS has run bathymetric surveys for many marine areas, as well as for rivers and lakes in the US, including Yellowstone Lake, Cra
The USGS has studied sea-surface temperature in many areas around the globe; you can find publications from these studies on the USGS Web site and by searching on the Intern