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Dexter Marsh's Quarry, Montague

Franklin County, Massachusetts
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Next site in MassachusettsMontague · 2 mi

Can I collect here?

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Based on our latest records, with claims updated from the BLM on Oct 3, 2026. Land and claims can change quickly, so check before you go.

Minerals on record here

1 mineral

Recorded here: fossil.

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2 miMontagueChalcopyrite, hematite3 miDeerfieldAgate4 minortheast Deerfield tracksiteFossil

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About Dexter Marsh's Quarry, Montague

Dexter Marsh's Quarry, Montague is a fossil collection site in Franklin, Massachusetts, cataloged in the Paleobiology Database. Fossils here come from the Portland Formation, dated to the Hettangian to Sinemurian (201.4–192.9 million years ago). The depositional environment is recorded as fluvial-lacustrine indet. Documented finds include Anomoepus scambus, Steropoides divaricatus, Anticheiropus pilulatus, Argoides minimus, Steropoides diversus, Sauropus barrattii.

Geologic setting

Formation
Portland
Geologic interval
Hettangian to Sinemurian
Age
201.4–192.9 Ma
Depositional environment
fluvial-lacustrine indet.
Altitude
79 meters
Recorded occurrences
12
Locality notes

SW part of Montague, less than 0.5 mi from Connecticut River

Fossils found here

Anomoepus scambus
Ornithischia · Moyenisauropodidae
Steropoides divaricatus
Reptilia · NO_FAMILY_SPECIFIED
Anticheiropus pilulatus
Saurischia · NO_FAMILY_SPECIFIED
Argoides minimus
Saurischia · NO_FAMILY_SPECIFIED
Steropoides diversus
Reptilia · NO_FAMILY_SPECIFIED
Sauropus barrattii
Reptilia · Sauropodidae
Anticheiropus hamatus
Saurischia · NO_FAMILY_SPECIFIED
Eubrontes
Reptilia · Grallatoridae

Records and references

Data: Paleobiology Database collection 52993 (CC BY 4.0) — view the source record

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Questions about Dexter Marsh's Quarry, Montague

Can you collect at Dexter Marsh's Quarry, Montague?

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 Dexter Marsh's Quarry, Montague?

Fossil.

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What to bring

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Meteorite nearbyA 353 g iron meteorite was found at Northampton in 1963, 15 miles from here.

Source: Paleobiology Database.