Rockhounding.org

UW 189

Chehalis County, Washington
Directions
Next site in WashingtonUW 131 · 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.
Read the collecting rules by land type

Based on our latest records, with claims updated from the BLM on Oct 9, 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 Washington
2 miUW 131Fossil3 miUW 138Fossil3 miUW 137Fossil

More fossil sites in Washington

See them all

More sites in Washington

View all Washington sites
The Market

New on the Market

Native American arrowheadNative American arrowhead$20cubedmoons3Browse the Market

Found something here? List it for sale

About UW 189

UW 189 is a fossil collection site in Chehalis, Washington, cataloged in the Paleobiology Database. Fossils here come from the Mesaverde Formation, dated to the Late Miocene (11.63–5.333 million years ago). The depositional environment is recorded as marine indet. Documented finds include Arca, Securella securis, Panopea generosa, Solena (Plectosolen) conradi, Mactromeris albaria, Mactromeris catilliformis.

Geologic setting

Formation
Mesaverde
Geologic interval
Late Miocene
Age
11.63–5.333 Ma
Depositional environment
marine indet.
Recorded occurrences
10

Fossils found here

Arca
Bivalvia · Arcidae
Securella securis
Bivalvia · Veneridae
Panopea generosa
Bivalvia · Hiatellidae
Solena (Plectosolen) conradi
Bivalvia · Solenidae
Mactromeris albaria
Bivalvia · Mactridae
Mactromeris catilliformis
Bivalvia · Mactridae
Yoldia (Cnesterium) aeolica
Bivalvia · Yoldiidae
Crepidula princeps
Gastropoda · Calyptraeidae
Cryptonatica affinis
Gastropoda · Naticidae
Sinum scopulosum
Gastropoda · Naticidae

Records and references

Data: Paleobiology Database collection 14444 (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 UW 189

Can you collect at UW 189?

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 UW 189?

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
  • Northwest 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.