Skip to Content

All News and Pages Related to "limestone"

Paleokarsts in Iowa

Posted on March 24th, 2015

Paleokarsts in Iowa by Robert M. McKay Following heavy rain, a muddy torrent of water laden with dislodged soil, twigs and leaves rushes down a gully and spills over a lip of rock, disappearing into a dark echoing hole. Crashing to the bottom of the pit, the flow continues outward and downward along narrow passageways […]

Geologic Hazards

Posted on April 30th, 2014

Earthquakes Iowa Geological Survey geologists have information on historic Iowa earthquakes and significant earthquakes in other areas of the midcontinent. Only 12 earthquakes with epicenters in Iowa are known in historic times. The first known occurred in 1867 near Sidney in southwest Iowa, the most recent in 1948 near Oxford in the east-central part of […]

Mineral Resources

Posted on April 30th, 2014

Cutting dimiensonal stone in the Bealer Quarry circa 1906 near Cedar Valley in Cedar County. Photo from the Calvin image database. Iowa is richly endowed with a variety of rock resources suitable for building construction, and their utility is particularly well displayed in the early architectural heritage of our state. Although building stone is still […]

General Geology

Posted on April 30th, 2014

Mineral, Rock, and Fossil Identification Geologists at the Iowa Geological Survey regularly identify rocks, minerals, and fossils that are brought into our office.  If you are not able to stop by our office, send photos of the specimen via email.  Please make sure that the photos capture all aspects of the specimen, are in focus, […]