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Our latest issue of The IGS Geode

January 23, 2023/in The Latest at IGS /by rtiwari

New Maps Published as part of USGS STATEMAP Program

September 14, 2022/in The Latest at IGS /by rtiwari

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IGS staff browsing rock library

Water - Figure 1

A green rocky canyon

Popular Interest

A man seated at a desk uses a microscope

Data and Resources

Ask A Geologist

Three men in outdoor winter work clothes pose in front of a drill rig

Colorful map of Iowa showing geological formations

MAPS AND PUBLICATIONS

A young man works with equipment in a field of cornstanks

Read Our Publications

Popular Interest

Maquoketa Caves DNR photo by Michael McKenzie

The sparkly interior of a geode

A fossil featuring what seems to be a spine and fins

A landscape of a swamp with reeds and water

Dark, battered-looking stone meteorite

Two people and a dog sit at an outlook far above a body of water

A rock with smaller minerals embedded

Map of Midcontinent rift in Iowa

1,500,000

Bags of rock chips in the IGS Rock Library

30

If put end to end, core samples in the IGS Rock Library would stretch 30 miles

470,000,000

IGS geologists determined that a meteor struck northeast Iowa 470M years ago

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