- In geology, rock (or stone) is any naturally occurring solid mass or aggregate of minerals or mineraloid matter. It is categorized by the minerals included, its chemical composition, and the way in which it is formed. Rocks form the Earth’s outer solid layer, the crust, and most of its interior, except for the liquid outer core and pockets of magma in the asthenosphere. The study of rocks involves multiple subdisciplines of geology, including petrology and mineralogy. It may be limited to rocks found on Earth, or it may include planetary geology that studies the rocks of other celestial objects.
- Renton — Thumbnail History (historylink.org)
The city of Renton, located some 12 miles southeast of downtown Seattle along the southern shores of Lake Washington, began as a center for extraction industries and, later, manufacturing. Over the years it has been the hub of many transportation corridors – from rivers to highways, rails to skyways…