Guthrie Quarry is a fossil collection site in Contra Costa, California, cataloged in the Paleobiology Database. Fossils here come from the Briones Formation, dated to the Barstovian (16.3–12.5 million years ago). The depositional environment is recorded as marine indet. Documented finds include Desmostylus hesperus.

Geologic setting

Formation: Briones
Geologic interval: Barstovian
Age: 16.3–12.5 Ma
Depositional environment: marine indet.
Recorded occurrences: 1

Fossils found here

Desmostylus hesperus

Mammalia · Desmostylidae

Records and references

Data: Paleobiology Database collection 91534 (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 Guthrie Quarry

Can you collect at Guthrie Quarry?

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 Guthrie Quarry?

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 Amazon Compare picks
Clear Anti-Fog Safety Glasses (4 Pack)Adjustable, anti-fog lenses for clear vision in any conditions.See it on Amazon Compare picks
Watertight Medical KitCompact, waterproof first aid kit with bandages, moleskin, and field essentials.See it on Amazon Compare picks
Southwest Treasure Hunter's Gem and Mineral GuideWhether you're digging for the first time or are an experienced rockhound or "prospector," with a simple rock hammer and...See it on Amazon

As an Amazon Associate we earn from qualifying purchases.

Source: Paleobiology Database.