This is a lock-in quarry: the gate is locked behind us and no one can enter or leave (except in an emergency) until about 12:15, when a group will be let out & others can come in if they are waiting at the gate. The rest of the group will leave about 4:30.

This is a "hard-rock" working quarry. All field trippers should have the appropriate safety equipment, such as hardhat, eye protection, long pants, & steel-toed or other sturdy shoes. All minors should be closely supervised by a parent/guardian.

Middle Devonian limestones of the Wapsipinicon & Cedar Valley Groups are exposed at Klein Quarry. A wide variety of marine fossils can be found in rocks of the Cedar Valley Group:
More common finds include: solitary & colonial corals, stromatoporoids, brachiopods, bryozoans, bivalves, & snails.
Less common finds include such things as: trilobites, crinoids, blastoids, cephalopods, & fish bones/teeth.
There are also scattered outcrops of non-marine Pennsylvanian age river deposits near the top of the quarry which sometimes contain plant fossils.
Useful tools include rock hammers, cold chisels, sledgehammers, & pry bars. Bring your own water and lunch. Sunblock and bug spray are not bad to have either, even in October! After all it was 90 degrees on the October 2010 trip!

Directions: From I-80 in Iowa City /Coralville, take Exit 240 & go south on Coral Ridge Avenue (on the west border of Coral Ridge Mall). Get in the far right lane & go a short distance to Hwy 6 (T intersection with stoplight). Turn right (west) onto Highway 6, go past a large Lowes store on the right and through a stoplight to the next left turn (SE Deer Creek Rd). Turn left (south) on SE Deer Creek. After you turn, you will see the quarry in front of you. Enter to the right near the top of the hill.