Where collection is allowed
The Floyd County Conservation Board permits visitors to collect fossils for personal collections in the quarry. Preserve rules still protect prairie, wildlife, structures, and areas outside the collecting setting.
Separate parking serves the nature center and quarry. Facility hours and seasonal services vary, so consult the conservation board before travel.
Tools, limits, and timing
Tools and methods
Use the least disruptive hand method allowed by current signage. Surface searching and gentle hand separation are preferred; do not cut vegetation or damage historic features.
Amount and use
Take only a personal collection. Commercial or bulk removal is inconsistent with the park’s stated allowance.
Season and current status
The outdoor preserve is weather-dependent, while nature-center hours are more limited. Confirm current access after storms or during winter.
Rules to confirm at the site
- Collect only common quarry fossils for personal use.
- Protect the prairie and historic kiln area.
- Follow current county signage and staff direction.
- Leave unusual or scientifically important material and report it.
An old webpage, saved map, app layer, social post, or prior visit cannot override a current closure, posted boundary, permit condition, mining claim, staff instruction, or landowner decision.
What makes the site geologically useful
The former quarry exposes fossil-rich Lime Creek Formation rocks from the Devonian Period.
The fossils record a marine community; group-level anatomy is more reliable than naming a species from a fragment.
A low-impact trip plan
- 1
Check county hours and notices.
- 2
Park in the quarry lot.
- 3
Begin with loose weathered material.
- 4
Wrap delicate specimens and record the quarry context.
- 5
Visit the nature center for local interpretation when open.
Site-specific preparation
- Use caution around quarry slopes and loose rock.
- Expect limited shade and changing Midwestern weather.
- Keep children away from steep faces.
Official sources
Open every relevant source shortly before departure. Fees, booking windows, fire rules, seasons, roads, and collection conditions can change without notice.
- Fossil & Prairie Park State Preserve Iowa Department of Natural Resources
- Fossils and visitor information Floyd County Conservation Board
Access and rule review: September 18, 2026. This guide is educational planning information, not a permit, reservation, boundary survey, or legal opinion.