Rockhounding in Monmouth County, New Jersey
6 mapped rockhounding spots in Monmouth County. Most commonly produces fossils, shark teeth, belemnite, quartz.
Monmouth County rockhounding photos
Representative spot and material photos from this county, shown where verified public image records are available.
Map showing 6 rockhounding spots in Monmouth County, New Jersey
Minerals reported in Monmouth County
Standouts in Monmouth County
Hand-picked spots in Monmouth County, chosen for unusual mineralogy or documented public access. Each card opens the full coordinates and access notes.
Top pickShark River
PublicMonmouth County
Shark River is named for the fossil shark teeth found where it cuts middle Eocene marine beds, notably the Shark River and Manasquan formations, roughly 45 million years old.
Shark Teeth, Fossils
Top pickBig Brook Park
PublicMonmouth County
Big Brook is New Jersey's best known free fossil stream, cutting Late Cretaceous marine beds of the Navesink Formation that are roughly 70 million years old.
Shark Teeth, Belemnite, Fossils
Top pickPoricy Park Fossil Beds
PublicMonmouth County
Poricy Brook exposes the same Late Cretaceous Navesink Formation as nearby Big Brook, and its fossil beds are among the most accessible in the state.
Belemnite, Shark Teeth, Fossils
Top pickRamanessin Brook
PublicMonmouth County
Ramanessin Brook is a quieter alternative to Big Brook and Poricy, draining the same Late Cretaceous Monmouth Group marine sequence in Holmdel.
Shark Teeth, Fossils
Spots in Monmouth County
| Spot | Minerals | Coordinates | Access |
|---|---|---|---|
| Big Brook ParkBoundary Road | 40.3060, -74.2560 | Public | |
| Long Branch | 40.3047, -73.9772 | Public | |
| Manasquan | 40.1127, -74.0318 | Public | |
| Poricy Park Fossil BedsOak Hill Road | 40.3760, -74.1170 | Public | |
| Ramanessin BrookMcCampbell Road | 40.3720, -74.1830 | Public | |
| Shark RiverWest Dianne Drive | 40.2002, -74.0728 | Public |
Neighboring counties in New Jersey
Adjacent rockhounding counties, ranked by how close their centroids sit to Monmouth County. A natural extension if Monmouth County is already on your trip plan.
- Hudson County~31 mi4 spotsTop: Amethyst, Common Opal, Fire Opal
- Somerset County~31 mi9 spotsTop: Quartz, Agate, Prehnite
- Mercer County~38 mi5 spotsTop: Calcite, Amber, Axinite
- Burlington County~45 mi3 spotsTop: Amber, Clear Agate, Jasper
- Morris County~48 mi11 spotsTop: Pyrite, Apatite, Chalcopyrite
- Hunterdon County~49 mi5 spotsTop: Axinite, Datolite, Actinolite
Across the state line from Monmouth County
Rockhounding counties in neighboring states within driving range. Geology rarely respects state borders — these are often the closest mapped spots you can reach without going deeper into New Jersey.
- Bucks County~48 miPennsylvania · 6 spotsTop: Petrified Wood, Jasper, Agate
- Suffolk County~73 miNew York · 1 spotTop: Almandine Garnet, Jasper, Quartz
- Delaware County~73 miPennsylvania · 8 spotsTop: Quartz, Amethyst, Feldspar
- Orange County~74 miNew York · 5 spotsTop: Bloodstone, Arsenopyrite, Blue Corundum
Monmouth County FAQ
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What rocks and minerals are common in Monmouth County?+
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