The Iowa Geoscience Education Information Network

Explore Iowa Geology

The Geology of Klein and Conklin Quarries (Johnson Co., Iowa)

Having a few issues with this page, trying to fix... August. 2018

Located near Coralville and Iowa City, the Klein and Conklin quarries provide a unique window into the Earth's past. These quarries are owned and operated by the River Products Company and are NOT open to the public without permission. We thank them for allowing us a chance to access their facilities and their continued support in geologic education! (Link to page 2)

20101009094505Y from Explore Iowa's Geology (IGEIN) on Vimeo.


Brian Witzke and Art Bettis (IGWS and U of I) introducing Klein Quarry. They are speaking about the sedimentary rock (Devonian and Pennsylvanian 375 to 300 million years ago) and Quaternary sediments (deposited by glaciers within the past 2 million years).Key words geologic contacts, pyrite, oxidation

20101009101437Y from Explore Iowa's Geology (IGEIN) on Vimeo.

Bob McKay and Art Bettis (IGWS and U of I) Glacial movement in Iowa (Part 1) - At this locality the glacial ice moved across Devonian bedrock. Keywords: Glacial scratching/striations, stream lined glacial forms, glacial flow direction

20101009102749Y from Explore Iowa's Geology (IGEIN) on Vimeo.

Art Bettis and Chuck Rovey (U of I and SW Missouri State) Glacial movement (Part 2) - Key words: till, unoxidized vs. oxidized, viscous ice, weathering surface, palaeosol, and sediment deformation structures.

20101009102338Y from Explore Iowa's Geology (IGEIN) on Vimeo.

Art Bettis, Bob McKay, and Chuck Rovey - Glacial movement (Part 3) Keywords: till deposits, debris-rich ice, basal ice, terminal moraine, and glacial obstacles.

Images from the field (Klein Quarry)