This resource explains how the oceans became salty. Topics include the source of the salt, how rainwater dissolves rock and carries the material away as dissolved ions, and the two most common ions in seawater. A link to additional information is also provided. Full description.

This portal provides access to information on United States Geological Survey (USGS) research projects and other topics in coastal and marine environments of the United States, especially on the west coast and the Pacific Ocean. Research projects can be searched by topic, location, project title, or from a publications list. Other resources include an ask-a-geologist feature, the coastal and marine ... Full description.