Marble Hill E General Area: Agate & Petrified Wood Rockhounding in Bollinger County, Missouri

Updated June 2026

Marble Hill E General Area is a mapped rockhounding spot in Bollinger County, Missouri. Reported finds include agate, petrified wood. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Bollinger County
State: Missouri
Nearest road: County Road 402
Postcode: 63764
Coordinates: 37.28212, -89.92327

Geology at Marble Hill E General Area

This spot sits on Smithville Dolomite, Powell Dolomite, Cotter Dolomite, Jefferson City Dolomite, mapped as dolostone that formed roughly 485 to 470 million years ago. Carbonate rock like this dissolves and weathers readily, so fresh road cuts, quarries, and creek exposures are typically the most productive ground.

Mapped unit: Smithville Dolomite, Powell Dolomite, Cotter Dolomite, Jefferson City Dolomite
Age: 485–470 Ma (Early Ordovician)
Rock types: dolostone
Elevation: 400 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 Marble Hill E General Area

Conditions here are workable year-round, with typical highs from 46°F in winter to 90°F in summer.

Climate normals: NOAA 1991-2020 monthlies, MARBLE HILL station (3 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 Marble Hill E General Area

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

Nearby rockhounding spots

Other rockhounding spots within driving distance of Marble Hill E General Area.

Across the state line from Marble Hill E General Area

Marble Hill E General Area is close enough to the Missouri border that the next-closest rockhounding spots are in a neighboring state. Worth knowing if you are already on the road.

Marble Hill E General Area FAQ

Where is Marble Hill E General Area?+

Marble Hill E General Area is in Bollinger County, Missouri, at 37.28212, -89.92327. Nearest road: County Road 402.

What rocks and minerals can you find at Marble Hill E General Area?+

Marble Hill E General Area is reported to produce Agate, Petrified Wood.

Is collecting allowed at Marble Hill E General Area?+

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 Marble Hill E General Area?+

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 Marble Hill E General Area?+

Marble Hill E General Area is workable year-round.

How do I get to Marble Hill E General Area?+

Open the directions link to navigate to 37.28212, -89.92327 in Google Maps. The nearest road is County Road 402.

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Open Marble Hill E General Area on the map

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