Rockhounding.org

M 109

Charles County, Maryland
Directions
Next site in MarylandPrince George’s County · 5 mi

Can I collect here?

Pro
See who owns this land and whether it is claimedPro shows the owner, the claim on this spot and every claim within a mile.
Read the collecting rules by land type

Based on our latest records, with claims updated from the BLM on Oct 15, 2026. Land and claims can change quickly, so check before you go.

Minerals on record here

1 mineral

Recorded here: fossil.

5 miPrince George’s CountyPetrified Wood7 miPiscataway Creek, Nanjemoy Fm., Potapaco M., MarylandFossil9 miM 119Fossil

More fossil sites in Maryland

See them all

More sites in Maryland

View all Maryland sites
The Market

New on the Market

Native American arrowheadNative American arrowhead$20cubedmoons3Browse the Market

Found something here? List it for sale

About M 109

M 109 is a fossil collection site in Charles, Maryland, cataloged in the Paleobiology Database. Fossils here come from the Nanjemoy Formation, dated to the Ypresian (56–48.07 million years ago). The depositional environment is recorded as marine indet. Documented finds include Nucula (Nucula), Tellina virginiana, Yoldia.

Geologic setting

Formation
Nanjemoy
Geologic interval
Ypresian
Age
56–48.07 Ma
Depositional environment
marine indet.
Recorded occurrences
3
Locality notes

1/2 mi. below Rosaryville and Upper Marlboro. Lat and long for Rosaryville, Prince George's county, MD.\r\n

Fossils found here

Nucula (Nucula)
Bivalvia · Nuculidae
Tellina virginiana
Bivalvia · Tellinidae
Yoldia
Bivalvia · Yoldiidae

Records and references

Data: Paleobiology Database collection 91552 (CC BY 4.0) — view the source record

Getting there

No directions yet.

How hard is it?

Getting there
– / 5
Finding anything
– / 5
Votes
0

Trip reports

No trip reports yet.

Questions about M 109

Can you collect at M 109?

It depends on who owns the land and whether a mining claim covers it. BLM land usually allows hand collecting for personal use, national parks allow none, and private land needs the owner’s permission. Pro members see the owner and any claims at this spot.

What minerals are found at M 109?

Fossil.

Comments

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

No comments yet.

What to bring

The whole kit
  • Estwing E3-22P Rock PickThe industry-standard 22oz geological hammer. One-piece forged steel with shock-reduction grip.See it on AmazonCompare picks
  • Clear Anti-Fog Safety Glasses (4 Pack)Adjustable, anti-fog lenses for clear vision in any conditions.See it on AmazonCompare picks
  • Watertight Medical KitCompact, waterproof first aid kit with bandages, moleskin, and field essentials.See it on AmazonCompare picks
  • Rockhounding Delaware, Maryland, and the Washington, DC Metro AreaWith this informative guide, you can explore the mineral-rich areas' of Delaware, Maryland, and Washington D.C., from th...See it on Amazon

As an Amazon Associate we earn from qualifying purchases.

Meteorite nearbyA 330 g stony meteorite fell at Lorton in 2010, 22 miles from here.

Source: Paleobiology Database.