Geography of Iowa
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The geography of Iowa includes the study of bedrock, landforms, rivers, geology, paleontology and urbanisation of the U.S. state of Iowa. The state covers an area of 56,272.81 sq mi.
Bedrock formations of Iowa
Iowa coal mine, 1936.
Geode half
Landforms of Iowa, based on Prior (1991) and Calvin (1904), with major rivers and streams
Coralville Lake
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Coralville Lake is an artificial lake in Johnson County, Iowa, United States, formed by the Coralville Dam, a dam built from 1949 to 1958 on the Iowa River upstream from the city of Coralville, Iowa.
Geography of Iowa
…the highest in the southern and the western parts of Iowa. Floods in 1993 washed away all the soil and unconsolidated bedrock along the spillway of the Coralville Lake Dam in Johnson County, exposing a rich collection of Devonian-age fossils from species such as ancient Hexagonaria corals. This area has been transformed…
Coralville Dam on June 15, 2008, with the main control gates fully opened, and water flowing over the concrete emergency spillway (left) at about 5 ft (1.5 m) deep
Coralville Dam and Reservoir near Coralville, Iowa.
Coralville Lake as seen from the airplane during winter