Rockhounding.org

Bolinas Point

Marin County, California
Directions
Next site in CaliforniaUnnamed Location (Spherulitic Chert) · 14 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 3, 2026. Land and claims can change quickly, so check before you go.

Minerals on record here

1 mineral

Recorded here: fossil.

0.3 miBolinas PointFossil14 miUnnamed Location (Spherulitic Chert)Spherulitic Chert15 miFort Point AreaDiabase, datolite, basalt +2

More fossil sites in California

See them all

More sites in California

View all California sites
The Market

New on the Market

Native American arrowheadNative American arrowhead$20cubedmoons3Browse the Market

Found something here? List it for sale

About Bolinas Point

Bolinas Point is a fossil collection site in Marin, California, cataloged in the Paleobiology Database. Fossils here come from the Santa Cruz Formation, dated to the Messinian (7.246–5.333 million years ago). The depositional environment is recorded as fluvial indet. Documented finds include Parabalaenoptera baulinensis, Acesta, Nitzschia.

Geologic setting

Formation
Santa Cruz
Geologic interval
Messinian
Age
7.246–5.333 Ma
Depositional environment
fluvial indet.
Recorded occurrences
3
Geology notes

fluvial influence, transgressive, shallow, coastal plain

Locality notes

sea cliff above the high tide mark near Bolinas Point, Point Reyes Peninsula

Fossils found here

Parabalaenoptera baulinensis
Mammalia · NO_FAMILY_SPECIFIED
Acesta
Bivalvia · Limidae
Nitzschia
Bacillariophyceae · Bacillariaceae

Records and references

Data: Paleobiology Database collection 46902 (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 Bolinas Point

Can you collect at Bolinas Point?

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 Bolinas Point?

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
  • 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.

Meteorite nearbyA 314 g stony meteorite fell at Novato in 2012, 16 miles from here.

Source: Paleobiology Database.