Brandon: Fossil Hunting in Buchanan County, Iowa

Updated June 2026

Brandon is a mapped rockhounding spot in Buchanan County, Iowa. Reported finds include geode, fossils. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Buchanan County
State: Iowa
Nearest road: 330th Street
Postcode: 52210
Coordinates: 42.31644, -91.99022

Geology at Brandon

This spot sits on ground mapped as Cedar Valley Group that formed roughly 390 to 370 million years ago. Fossils here are typically found in fresh exposures, where erosion keeps bringing new material to the surface.

Mapped unit: Cedar Valley Group
Age: 390–370 Ma (Middle Devonian to Late Devonian)
Elevation: 840 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 Brandon

Best months: April to October. Typical highs run 81°F in midsummer and 25°F in midwinter, with winter lows near 8°F.

Climate normals: NOAA 1991-2020 monthlies, VINTON station (12 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 Brandon

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 Brandon.

Across the state line from Brandon

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

Brandon FAQ

Where is Brandon?+

Brandon is in Buchanan County, Iowa, at 42.31644, -91.99022. Nearest road: 330th Street.

What rocks and minerals can you find at Brandon?+

Brandon is reported to produce Geode, Fossils.

Is collecting allowed at Brandon?+

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 Brandon?+

A rock hammer, a cold chisel, safety glasses, and newspaper or foam for wrapping finds cover most fossil ground. A trowel and a sieve help in soft exposures.

When is the best time to visit Brandon?+

The most comfortable months at Brandon are April to October.

How do I get to Brandon?+

Open the directions link to navigate to 42.31644, -91.99022 in Google Maps. The nearest road is 330th Street.

More rockhounding in Iowa

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Open Brandon on the map

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