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USA (national)

IOWA STATE ROCK

Iowa geodes - click to see all geological symbols
Keokuk, Iowa geodes; photo by Curtis Newton on Flickr (noncommercial
use permitted with attribution / share alike). All Geological Symbols .

Geode

Iowa geode video

The Geode was designated the official rock of Iowa in 1967 to promote tourism in the state. Iowa is known worldwide because of the large number of rare and beautiful geodes found in the state. The Latin word "geodes" means earthlike, and geodes are shaped like the earth with a hard outer shell that when cut reveals a core of sparkling mineral crystals (usually quartz and calcite).

Geode bridge - click to see all geological symbols
Geode bridge in Mount Pleasant, Iowa. Photo by Joe Naylor on Flickr (use permitted with attribution). All Geological Symbols.

Southeastern Iowa is one of the state's best Geode collecting areas. Geode State Park, in Henry County, is named for the occurrence of the Geode. The geode is also the state rock of Oregon (thunder-egg)

Uncracked Iowa geodes - click to see all geo symbols
Photo of uncracked geodes (from Keokuk, Iowa) by Ryan Thompson on Flickr (noncommercial use permitted with attribution / share alike). All State Rocks.
Source:
Iowa State Symbols: Iowa.gov
Links:
Geodes - Iowa's State Rock: Iowa DNR
All Geological Symbols


Iowa Geode Video

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