Caesar Creek State Park: brachiopods, bryozoans, crinoids, trilobites, and corals in Waynesville, Ohio

November 25, 2025March 29, 2026Leave a comment

Caesar Creek State Park is a premier fossil collecting location in Clinton County, Ohio. The site exposes Ordovician (Late Ordovician) fossils where visitors can hunt for brachiopods, bryozoans, crinoids, trilobites, and corals.

The site is a designated fossil collecting area spanning multiple football fields of exposed bedrock. Free permits required and available at visitor center (4020 N Clarksville Rd, open Mon-Fri 8AM-4PM, Sat-Sun 8:30AM-5PM). Fossils approximately 445-450 million years old. Bring rock hammer, chisels, safety glasses, and collection bags. Best collecting after rain when freezing and thawing has broken apart new rocks. Only fossils that fit in palm of hand may be taken; larger specimens should be reported to rangers. Over 2,000 trilobite specimens including large Isotelus have been found. One of several excellent Ordovician collecting sites in southwestern Ohio. Park also features 14-mile Perimeter Trail and Pioneer Village.

Caesar Creek Lake was created by a dam constructed by the U.S. Army Corps of Engineers in 1978 for flood control. The spillway construction exposed Ordovician fossil-bearing limestone and shale. The area is part of the famous Cincinnati Arch fossil region where the earth’s crust buckled upward during the Taconic Orogeny, bringing ancient sea floor rocks to the surface.

This complete guide covers everything you need to know about fossil collecting at Caesar Creek, including directions to the site, collecting rules and regulations, the types of fossils you can find, and what to expect during your visit. Waynesville provides the nearest services and amenities for visiting collectors.

Location and Directions

Caesar Creek State Park is located at 4020 N Clarksville Rd. The fossil collecting site is in Waynesville, Clinton County, Ohio.

Directions to Caesar Creek

To reach Caesar Creek: The visitor Center provides information and free permits; you can collect at the spillway south of visitor center.

When you arrive, the fossil collecting area is located at the spillway area and designated fossil collecting zones.

What Fossils You’ll Find

Caesar Creek contains Ordovician (Late Ordovician) fossils preserved in limestone and shale.

Brachiopods are the primary fossil assemblage at the site. Bryozoans are also found throughout the collecting area. Crinoids occur less frequently but have been been discovered at Caesar Creek.

Geologic History

Caesar Creek exposes the Whitewater Formation, a significant Ordovician (Late Ordovician) geological unit in Clinton County, Ohio.

Millions of years ago, the area that is now Waynesville, Ohio was a shallow tropical sea covering the region. The climate was tropical with warm shallow seas supporting extensive marine communities including corals, brachiopods, bryozoans, and trilobites.

As these ancient organisms died, sediments buried and preserved their remains. Over millions of years, geological processes transformed these sediments into the fossil-bearing rocks visible at Caesar Creek today.

How Caesar Creek Became a Fossil Collecting Site

Caesar Creek was established as a protected area to preserve fossil resources while providing public access for education and collecting. Recognition of the site’s paleontological importance led to its designation as a managed collecting location.

Park or preserve status protects Caesar Creek from commercial exploitation while maintaining access for hobbyists and researchers. This management approach ensures fossil resources remain available for future generations while allowing current visitors to experience the thrill of discovery.

Collecting Rules & Regulations

Is Fossil Collecting Allowed?

Fossil collecting is allowed at Caesar Creek. Visitors may keep the fossils they find at this public collecting site.

Key Points:

Open to all experience levels
Specimens become property of the collector
Free access to fossil beds

Tools and Equipment

Recommended Tools:

Fossil collectors should verify which tools are allowed before beginning their search. Some sites provide tools for visitors, while others require collectors to bring their own equipment.

Common Collecting Tools:

Rock hammers and chisels
Brushes for cleaning specimens
Hand screens for processing sediment
Sturdy containers, bags, or buckets
Newspaper or bubble wrap for protection
Spray bottle with water (reveals fossil details)

Safety Guidelines

Essential Safety Guidelines:

Safety should be every collector’s top priority when visiting Caesar Creek.

Personal Protection:

Wear closed-toe shoes or boots with good traction
Eye protection is essential when using rock hammers or chisels
Sun protection: sunscreen, hats, and protective clothing
Bring plenty of water and stay hydrated

Site Awareness:

Supervise children at all times
Watch for unstable rock faces, deep water, steep slopes
Be aware of poisonous plants and wildlife
Let someone know your plans before visiting remote sites
Never collect alone in isolated areas

Sources

FossilGuy.com Caesar Creek guide; US Army Corps of Engineers Caesar Creek Lake information; Dry Dredgers Cincinnati fossil club documentation; D.L. Shrake 1992 GSA Guidebook No.12; This Local Life Ohio fossil parks article; TrekOhio blog; Time Scavengers paleontology blog

Trammel Fossil Park: bryozoans, brachiopods, crinoids, trilobites, and corals in Sharonville, Ohio

November 25, 2025March 29, 2026Leave a comment

Trammel Fossil Park is a premier fossil collecting location in Hamilton County, Ohio. The site exposes Ordovician (Late Ordovician) fossils where visitors can hunt for bryozoans, brachiopods, crinoids, trilobites, and corals.

Public collecting is allowed with no permit required; hand tools permitted; follow park guidance available at sharonville.org. Free access. Approximately 440-450 million years old. Bryozoans and brachiopods abundant. Crinoids and trilobites less common but present. Four formations labeled on hillside (Fairview, Miamitown, Bellevue, Corryville). Educational kiosk in shape of Edrioasteroid (Cincinnati’s official city fossil) with excellent interpretive signs. Bring hammer, chisel, safety glasses. City park facilities include picnic tables, portable toilets and hand washing station (April-November), drinking fountain. Hiking trail to hilltop view of Cincinnati. One of several excellent Ordovician sites in Cincinnati area. Rocks originated in Cincinnatian Series and are important geological reference globally. Over 1,200 species of fossilized animals identified in southwest Ohio Ordovician deposits.

Before becoming a park, the land was part of an industrial park when a layer of rare Edrioasteroids (Cincinnati’s official city fossil) were discovered and uncovered by professionals from University of Cincinnati and amateur paleontologists from the Dry Dredgers fossil club. R.L. Trammel donated the 10-acre plot of land to the City of Sharonville. The park was officially dedicated in 2003.

This complete guide covers everything you need to know about fossil collecting at Trammel, including directions to the site, collecting rules and regulations, the types of fossils you can find, and what to expect during your visit. Sharonville provides the nearest services and amenities for visiting collectors.

Location and Directions

You can find Trammel in Hamilton County, Ohio.

Directions to Trammel

To reach Trammel: Find Tramway Dr off Hauck Dr in Sharonville; follow park signage to parking area.

When you arrive, the fossil collecting area is located at the city park collecting area on hillside exposures.

What Fossils You’ll Find

Trammel contains Ordovician (Late Ordovician) fossils preserved in limestone and shale.

Bryozoans are the primary fossil assemblage at the site. Brachiopods are also found throughout the collecting area. Crinoids occur less frequently but have been been discovered at Trammel.

Geologic History

Trammel exposes the Corryville Formation, a significant Ordovician (Late Ordovician) geological unit in Hamilton County, Ohio.

Millions of years ago, the area that is now Sharonville, Ohio was a shallow tropical sea. The climate was warm tropical with shallow seas. Ohio was located south of the equator during this period.

How Trammel Became a Fossil Collecting Site

Trammel originally operated as an industrial site where commercial activities exposed fossil-bearing rock layers. Quarrying, mining, or excavation operations removed overlying sediments and revealed ancient deposits that had been buried for millions of years.

After industrial operations ceased, Trammel transitioned to a location where fossil enthusiasts could legally collect specimens. The legacy of this industrial activity created the accessible rock exposures that make fossil collecting possible today. Many of the world’s most productive fossil sites share this history of industrial operations inadvertently revealing paleontological treasures.

Collecting Rules & Regulations

Is Fossil Collecting Allowed?

Fossil collecting is allowed at Trammel. Visitors may keep the fossils they find at this public collecting site.

Key Points:

No permits or fees required
Open to all experience levels
Specimens become property of the collector
Free access to fossil beds

Tools and Equipment

Recommended Tools:

Fossil collectors should verify which tools are allowed before beginning their search. Some sites provide tools for visitors, while others require collectors to bring their own equipment.

Common Collecting Tools:

Rock hammers and chisels
Brushes for cleaning specimens
Hand screens for processing sediment
Sturdy containers, bags, or buckets
Newspaper or bubble wrap for protection
Spray bottle with water (reveals fossil details)

Safety Guidelines

Essential Safety Guidelines:

Safety should be every collector’s top priority when visiting Trammel.

Personal Protection:

Wear closed-toe shoes or boots with good traction
Eye protection is essential when using rock hammers or chisels
Sun protection: sunscreen, hats, and protective clothing
Bring plenty of water and stay hydrated

Site Awareness:

Supervise children at all times
Watch for unstable rock faces, deep water, steep slopes
Be aware of poisonous plants and wildlife
Let someone know your plans before visiting remote sites
Never collect alone in isolated areas

Sources

City of Sharonville Parks website; Dry Dredgers documentation with historic photos; Atlas Obscura; Cincinnati Museum Center fossil collecting guide; Spectrum News report 2019; 365Cincinnati blog; Visit Cincy tourism

Hueston Woods State Park: brachiopods, bryozoans, crinoids, trilobites, and horn corals in Ohio

November 25, 2025March 29, 2026Leave a comment

Hueston Woods State Park is a fossil collecting location in Preble County, Ohio. The site exposes Ordovician (Late Ordovician Richmondian) fossils where visitors can hunt for brachiopods, bryozoans, crinoids, trilobites, and horn corals.

Collecting is allowed in designated areas; check park visitor center for current rules and permitted locations (6301 Park Office Rd). May also need to check Army Corps of Engineers rules for some areas. Free access with park admission. No permit required but check with naturalist before collecting.

Hueston Woods began when Matthew Hueston started purchasing land in 1797 after serving under General Mad Anthony Wayne. His descendants remained until the 1930s. The state bought the land in 1941 and opened it as a state park in 1957. In 1956, Four Mile Creek was dammed to form 625-acre Acton Lake, named for Ohio legislator Clyde Acton who persuaded the legislature to buy the property. The park’s beech-maple climax forest was designated a National Natural Landmark by the National Park Service in 1967. The park is known as one of the best places in the world to hunt for Ordovician-age fossils, visited by people from around the world each year.

This complete guide covers everything you need to know about fossil collecting at Hueston Woods, including directions to the site, collecting rules and regulations, the types of fossils you can find, and what to expect during your visit.

Location and Directions

Hueston Woods State Park is located at 6301 Park Office Rd College Corner OH. The fossil collecting site is in Preble County, Ohio.

Directions to Hueston Woods

To reach Hueston Woods: There are multiple creek localities within park including Four Mile Creek Picnic Area near dam and Covered Bridge Area; check visitor center for permitted spots.

When you arrive, the fossil collecting area is located at designated creek exposures especially Four Mile Creek and Covered Bridge areas.

What Fossils You’ll Find

Hueston Woods contains Ordovician (Late Ordovician Richmondian) fossils preserved in limestones and shales.

Brachiopods are the primary fossil assemblage at the site. Bryozoans are also found throughout the collecting area. Crinoids occur less frequently but have been been discovered at Hueston Woods.

Geologic History

Hueston Woods exposes the Richmond Group formation, a significant Ordovician (Late Ordovician Richmondian) geological unit in Preble County, Ohio.

Millions of years ago, the area that is now Ohio was a shallow tropical sea environment. The climate was warm tropical with extensive shallow seas supporting diverse marine communities.

How Hueston Woods Became a Fossil Collecting Site

Hueston Woods was established as a protected area to preserve fossil resources while providing public access for education and collecting. Recognition of the site’s paleontological importance led to its designation as a managed collecting location.

Park or preserve status protects Hueston Woods from commercial exploitation while maintaining access for hobbyists and researchers. This management approach ensures fossil resources remain available for future generations while allowing current visitors to experience the thrill of discovery.

Collecting Rules & Regulations

Is Fossil Collecting Allowed?

Fossil collecting is allowed at Hueston Woods. Visitors may keep the fossils they find at this public collecting site.

Key Points:

No permits or fees required
Open to all experience levels
Specimens become property of the collector
Free access to fossil beds

Tools and Equipment

Recommended Tools:

Fossil collectors should verify which tools are allowed before beginning their search. Some sites provide tools for visitors, while others require collectors to bring their own equipment.

Common Collecting Tools:

Rock hammers and chisels
Brushes for cleaning specimens
Hand screens for processing sediment
Sturdy containers, bags, or buckets
Newspaper or bubble wrap for protection
Spray bottle with water (reveals fossil details)

Safety Guidelines

Essential Safety Guidelines:

Safety should be every collector’s top priority when visiting Hueston Woods.

Personal Protection:

Wear closed-toe shoes or boots with good traction
Eye protection is essential when using rock hammers or chisels
Sun protection: sunscreen, hats, and protective clothing
Bring plenty of water and stay hydrated

Site Awareness:

Supervise children at all times
Watch for unstable rock faces, deep water, steep slopes
Be aware of poisonous plants and wildlife
Let someone know your plans before visiting remote sites
Never collect alone in isolated areas

Sources

Ohio DNR Hueston Woods State Park website; Wikipedia; This Local Life Ohio fossil parks article; Atlas of Ordovician Life fossil collecting documentation; The Lake Effect blog; StateParkS.info article Dec 2024; Only In Your State article July 2025; Akron Ohio Moms fossil hunting guide; Ohio DNR Geological Survey fossil collecting guide

Cowan Lake State Park: brachiopods, bryozoans, horn corals, and crinoids in Wilmington, Ohio

November 25, 2025March 29, 2026Leave a comment

Cowan Lake State Park is a premier fossil collecting location in Clinton County, Ohio. The site exposes Ordovician (Late Ordovician) fossils where visitors can hunt for brachiopods, bryozoans, horn corals, and crinoids.

Collecting is allowed (check park guidance/visitor center for current rules).

Cowan Lake was created by a dam for flood control. The spillway exposed Ordovician limestone containing abundant fossils. The exposed rock layers represent the ancient sea floor that once covered this region.

This complete guide covers everything you need to know about fossil collecting at Cowan Lake, including directions to the site, collecting rules and regulations, the types of fossils you can find, and what to expect during your visit. Wilmington provides the nearest services and amenities for visiting collectors.

Location and Directions

Cowan Lake State Park is located at 1750 Osborn Rd, Wilmington, OH 45177-8615. The fossil collecting site is in Wilmington, Clinton County, Ohio.

Directions to Cowan Lake

To reach Cowan Lake: Find the spillway area on Route 730 north side of dam.

When you arrive, the fossil collecting area is located at the spillway exposure.

What Fossils You’ll Find

Cowan Lake contains Ordovician (Late Ordovician) fossils preserved in limestone and shale.

Brachiopods are the primary fossil assemblage at the site. Bryozoans are also found throughout the collecting area. Horn corals occur less frequently but have been been discovered at Cowan Lake.

Geologic History

The fossils at Cowan Lake formed during the Ordovician (Late Ordovician).

Millions of years ago, the area that is now Wilmington, Ohio was a shallow tropical sea environment. The climate was warm tropical with shallow marine conditions.

How Cowan Lake Became a Fossil Collecting Site

Park or preserve status protects Cowan Lake from commercial exploitation while maintaining access for hobbyists and researchers. This management approach ensures fossil resources remain available for future generations while allowing current visitors to experience the thrill of discovery.

Collecting Rules & Regulations

Is Fossil Collecting Allowed?

Fossil collecting is allowed at Cowan Lake. Visitors may keep the fossils they find at this public collecting site.

Key Points:

No permits or fees required
Open to all experience levels
Specimens become property of the collector
Free access to fossil beds

Tools and Equipment

Recommended Tools:

Fossil collectors should verify which tools are allowed before beginning their search. Some sites provide tools for visitors, while others require collectors to bring their own equipment.

Common Collecting Tools:

Rock hammers and chisels
Brushes for cleaning specimens
Hand screens for processing sediment
Sturdy containers, bags, or buckets
Newspaper or bubble wrap for protection
Spray bottle with water (reveals fossil details)

Safety Guidelines

Essential Safety Guidelines:

Safety should be every collector’s top priority when visiting Cowan Lake.

Personal Protection:

Wear closed-toe shoes or boots with good traction
Eye protection is essential when using rock hammers or chisels
Sun protection: sunscreen, hats, and protective clothing
Bring plenty of water and stay hydrated

Site Awareness:

Supervise children at all times
Watch for unstable rock faces, deep water, steep slopes
Be aware of poisonous plants and wildlife
Let someone know your plans before visiting remote sites
Never collect alone in isolated areas

Sources

Ohio state parks documentation; This Local Life Ohio fossil parks article

East Fork State Park: brachiopods, bryozoans, trilobites, crinoids, and horn corals in Bethel, Ohio

November 25, 2025March 29, 2026Leave a comment

East Fork State Park is a premier fossil collecting location in Clermont County, Ohio. The site exposes Ordovician (Late Ordovician) fossils where visitors can hunt for brachiopods, bryozoans, trilobites, crinoids, and horn corals.

Collecting is allowed with visitor center permit. Must obtain permit from Army Corps of Engineers Visitor Center.

East Fork Lake was created by a dam. The emergency spillway construction exposed Ordovician fossil-bearing rocks. The park is one of the largest in Ohio at nearly 5,000 acres.

This complete guide covers everything you need to know about fossil collecting at East Fork, including directions to the site, collecting rules and regulations, the types of fossils you can find, and what to expect during your visit. Bethel provides the nearest services and amenities for visiting collectors.

Location and Directions

East Fork State Park is located at 3294 Elklick Rd, Bethel, OH 45106-9327. The fossil collecting site is in Bethel, Clermont County, Ohio. When you arrive, the fossil collecting area is located at the spillway fossil exposure.

What Fossils You’ll Find

East Fork contains Ordovician (Late Ordovician) fossils preserved in limestone and shale.

Brachiopods are the primary fossil assemblage at the site. Bryozoans are also found throughout the collecting area. Trilobites occur less frequently but have been been discovered at East Fork.

Geologic History

The fossils at East Fork formed during the Ordovician (Late Ordovician).

Millions of years ago, the area that is now Bethel, Ohio was a shallow tropical sea environment. The climate was warm tropical with extensive shallow seas.

How East Fork Became a Fossil Collecting Site

East Fork Lake was created by a dam. The emergency spillway construction exposed Ordovician fossil-bearing rocks.

Park or preserve status protects East Fork from commercial exploitation while maintaining access for hobbyists and researchers. This management approach ensures fossil resources remain available for future generations while allowing current visitors to experience the thrill of discovery.

Collecting Rules & Regulations

Is Fossil Collecting Allowed?

East Fork allows fossil collecting for visitors who follow proper procedures. A permit or admission fee is required before collecting begins.

Key Points:

Permit or admission fee required
Collectors keep all specimens found
Staff available for questions and identification
Reservations may be recommended during peak seasons

The fee helps maintain the site and ensure quality experiences for all visitors.

Tools and Equipment

Recommended Tools:

Fossil collectors should verify which tools are allowed before beginning their search. Some sites provide tools for visitors, while others require collectors to bring their own equipment.

Common Collecting Tools:

Rock hammers and chisels
Brushes for cleaning specimens
Hand screens for processing sediment
Sturdy containers, bags, or buckets
Newspaper or bubble wrap for protection
Spray bottle with water (reveals fossil details)

Safety Guidelines

Essential Safety Guidelines:

Safety should be every collector’s top priority when visiting East Fork.

Personal Protection:

Wear closed-toe shoes or boots with good traction
Eye protection is essential when using rock hammers or chisels
Sun protection: sunscreen, hats, and protective clothing
Bring plenty of water and stay hydrated

Site Awareness:

Supervise children at all times
Watch for unstable rock faces, deep water, steep slopes
Be aware of poisonous plants and wildlife
Let someone know your plans before visiting remote sites
Never collect alone in isolated areas

Sources

Ohio state parks documentation; Army Corps of Engineers regulations

Oakes Quarry Park: marine fossils such as brachiopods, corals, bryozoans, and crinoids in Fairborn, Ohio

November 25, 2025March 29, 2026Leave a comment

Oakes Quarry Park is a premier fossil collecting location in Greene County, Ohio. The site exposes Silurian fossils where visitors can hunt for marine fossils such as brachiopods, corals, bryozoans, and crinoids.

The site allows viewing and educational programs; collecting rules available at visitor center. Interpretive trails through quarry exposures. Approximately 430-440 million years old Silurian reef fossils abundant. Some collecting may be allowed in designated areas (check with park). Visitor center and educational programs available. The quarry provides excellent views of reef structure and fossil assemblages.

Oakes Quarry is a preserved limestone quarry that operated until the 1990s. The city of Fairborn acquired the property and developed it as a geological and educational park with interpretive trails through the quarry.

This complete guide covers everything you need to know about fossil collecting at Oakes, including directions to the site, collecting rules and regulations, the types of fossils you can find, and what to expect during your visit. Fairborn provides the nearest services and amenities for visiting collectors.

Location and Directions

You can find Oakes in Greene County, Ohio.

Directions to Oakes

To reach Oakes: Find the city of Fairborn park with quarry trails and interpretive center.

When you arrive, the fossil collecting area is located at the preserved quarry exposures.

What Fossils You’ll Find

Oakes contains Silurian fossils preserved in limestone and dolomite.

Brachiopods are the primary fossil assemblage at the site. Corals (tabulate and rugose) are also found throughout the collecting area. Bryozoans occur less frequently but have been been discovered at Oakes.

Geologic History

Oakes exposes the Cedarville Dolomite and Springfield Limestone, a significant Silurian geological unit in Greene County, Ohio.

Millions of years ago, the area that is now Fairborn, Ohio was an ancient reef environment. The climate was tropical with warm shallow seas and extensive reef development.

How Oakes Became a Fossil Collecting Site

Oakes originally operated as an industrial site where commercial activities exposed fossil-bearing rock layers. Quarrying, mining, or excavation operations removed overlying sediments and revealed ancient deposits that had been buried for millions of years.

After industrial operations ceased, Oakes transitioned to a location where fossil enthusiasts could legally collect specimens. The legacy of this industrial activity created the accessible rock exposures that make fossil collecting possible today. Many of the world’s most productive fossil sites share this history of industrial operations inadvertently revealing paleontological treasures.

Collecting Rules & Regulations

Is Fossil Collecting Allowed?

Fossil collecting is permitted at Oakes with certain restrictions in place.

Key Points:

Specific rules regarding quantity limits or size restrictions
Designated collecting areas may apply
Some specimens may be protected
Check current regulations before visiting

These restrictions help preserve fossil resources for future visitors while still allowing meaningful collecting experiences.

Tools and Equipment

Recommended Tools:

Fossil collectors should verify which tools are allowed before beginning their search. Some sites provide tools for visitors, while others require collectors to bring their own equipment.

Common Collecting Tools:

Rock hammers and chisels
Brushes for cleaning specimens
Hand screens for processing sediment
Sturdy containers, bags, or buckets
Newspaper or bubble wrap for protection
Spray bottle with water (reveals fossil details)

Safety Guidelines

Essential Safety Guidelines:

Safety should be every collector’s top priority when visiting Oakes.

Personal Protection:

Wear closed-toe shoes or boots with good traction
Eye protection is essential when using rock hammers or chisels
Sun protection: sunscreen, hats, and protective clothing
Bring plenty of water and stay hydrated

Site Awareness:

Supervise children at all times
Watch for unstable rock faces, deep water, steep slopes
Be aware of poisonous plants and wildlife
Let someone know your plans before visiting remote sites
Never collect alone in isolated areas

Sources

City of Fairborn parks documentation; Ohio geological surveys