Devonian Fossil Gorge: Karst Surface 360° View | Iowa Land and Sky
263 views · Published 13 December 2018 · 2:21 · Indexed 31 October 2026
Channel: Iowa PBS · 2018 · Music
This location in the Devonian Fossil Gorge shows its karstified surface. This cave-like opening was formed by groundwater dissolving part of a limestone bed, a process called karstification. // During the floods of 1993 and 2008, Coralville Lake in Coralville, Iowa exceeded its capacity, and excess water flowed over the emergency spillway. The 1993 overflow continued for 28 days and washed away road, campground, and up to 17 feet of soil and rock, exposing the Devonian bedrock, a 375 million-year-old seafloor. The area was widened in 2008 when floodwaters again swept through. Explore Iowa's land, biodiversity and environmental issues from a different perspective. http://www.iptv.org/iowalandandsky Funding for Iowa Land and Sky provided by the Resource Enhancement and Protection Conservation Education Program (REAP CEP) and the Gilchrist Foundation.
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