Blenheim: Petrified Wood Rockhounding in Marlboro County, South Carolina

Updated June 2026

Blenheim is a mapped rockhounding spot in Marlboro County, South Carolina. Reported finds include petrified wood. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Marlboro County
State: South Carolina
Postcode: 29516
Coordinates: 34.44207, -79.66181

Geology at Blenheim

This spot sits on Penholoway Formation, mapped as sand and clay that formed within roughly the last 3 million years. Petrified wood typically travels as tough float, and worked gravels like these are exactly where weathered pieces tend to collect.

Mapped unit: Penholoway Formation
Age: 3 Ma to present (Quaternary)
Rock types: sand and clay
Elevation: 110 ft

Geologic mapping via Macrostrat and the underlying state geological survey maps (CC BY 4.0). Bedrock at the surface can vary within a mapped unit.

Best time to visit Blenheim

Best months: September to June. Typical highs run 93°F in midsummer and 57°F in midwinter, with winter lows near 34°F.

Climate normals: NOAA 1991-2020 monthlies, FLORENCE 8 NE station (11 mi away).

Land & collecting status

Generally open to casual rockhounding

Most public-tagged spots sit on BLM, U.S. Forest Service, or other federal land where reasonable hand collecting of common rocks and minerals is allowed. Confirm posted rules and active mining claims before you dig.

Public-land rules vary by agency, season, and field office. The RockHoundR app pulls live BLM, USFS, NPS, and tribal overlays so you can see exactly which agency manages the ground at this spot.

Sources & verification

Spot details combine the public RockHoundR location dataset, normalized mineral labels, agency land-status checks in the app, and community submissions. Coordinates are approximate until verified in the field.

Sources: RockHoundR public spot dataset, app land overlays, and local agency review before each trip.

Found at Blenheim

Each chip opens all spots that produce that material; the encyclopedia link opens the full ID and field guide.

Petrified Wood Encyclopedia →

Nearby rockhounding spots

Other rockhounding spots within driving distance of Blenheim.

Across the state line from Blenheim

Blenheim is close enough to the South Carolina border that the next-closest rockhounding spots are in a neighboring state. Worth knowing if you are already on the road.

Blenheim FAQ

Where is Blenheim?+

Blenheim is in Marlboro County, South Carolina, at 34.44207, -79.66181.

What rocks and minerals can you find at Blenheim?+

Blenheim is reported to produce Petrified Wood.

Is collecting allowed at Blenheim?+

Generally open to casual rockhounding. Most public-tagged spots sit on BLM, U.S. Forest Service, or other federal land where reasonable hand collecting of common rocks and minerals is allowed. Confirm posted rules and active mining claims before you dig. Always confirm current rules with the managing agency before a trip.

What tools should I bring to Blenheim?+

A rock hammer, sturdy gloves, and a padded bag cover petrified wood hunting. Most pieces are surface float, so walking slopes and washes beats digging.

When is the best time to visit Blenheim?+

The most comfortable months at Blenheim are September to June.

How do I get to Blenheim?+

Open the directions link to navigate to 34.44207, -79.66181 in Google Maps. Some spots are remote, so check road conditions before driving out.

More rockhounding in South Carolina

See all 49 South Carolina spots →

Open Blenheim on the map

Use the RockHoundR app for live land overlays, weather, geology, directions, and saved finds.