Where is the Keokuk geode found?
Monday, June 22, 2009@ 1:57 PM
Geodes are a geological rock formation which occurs in sedimentary rocks. Geodes are essentially rock cavities with internal crystal formations. The exterior of the most common geodes is generally limestone or a related rock, while the interior contains quartz crystals deposits. Other geodes are completely filled with crystal, being solid all the way through. These types of geodes are called nodules.
The Keokuk geode is found around the town of Keokuk, Iowa, and is known as the geode capital of the world. Geodes from the Keokuk area contain a variety of minerals, but quartz is the most dominant. The Iowa General Assembly declared the geodes as the official “State Rock” in 1967.