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Downstream from the Holyoke dam

Massachusetts
Directions
Next site in MassachusettsSouth Hadley Falls tracksite · 0.2 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.
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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.

Nearby sites

All of Massachusetts
0.2 miSouth Hadley Falls tracksiteFossil2 mitracksite below Smith's Ferry, NorthamptonFossil2 miMount Tom, "Ostrom Bed"Fossil

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About Downstream from the Holyoke dam

Downstream from the Holyoke dam is a fossil collection site in 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 pond and the tectonic setting is rift. Documented finds include Polyphaga, Reptilia, Semionotus.

Geologic setting

Formation
Portland
Geologic interval
Hettangian to Sinemurian
Age
201.4–192.9 Ma
Depositional environment
pond
Tectonic setting
rift
Recorded occurrences
4
Geology notes

Ephemeral floodplain pond or shallow lake deposit

Fossils found here

Polyphaga
Insecta
Reptilia
Reptilia
Semionotus
Osteichthyes · Semionotidae

Records and references

Data: Paleobiology Database collection 153642 (CC BY 4.0) — view the source record

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Questions about Downstream from the Holyoke dam

Can you collect at Downstream from the Holyoke dam?

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 Downstream from the Holyoke dam?

Fossil.

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Meteorite nearbyA 353 g iron meteorite was found at Northampton in 1963, 7 miles from here.

Source: Paleobiology Database.