Sigurd: Anhydrite & Gypsum Rockhounding in Sevier County, Utah

Quick details

Access

Permission required

County

Sevier County

State

Utah

Coordinates

38.85024, -111.94208

Geology at Sigurd

This spot sits on Arapien Shale, mapped as mudstone that formed roughly 175 to 160 million years ago. Sedimentary rock like this erodes unevenly, so the most productive collecting is typically along fresh cuts, badland slopes, and active drainages.

Mapped unit

Arapien Shale

Age

175–160 Ma (Middle Jurassic)

Rock types

mudstone

Elevation

5,390 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 Sigurd

Best months: February to November. Typical highs run 90°F in midsummer and 41°F in midwinter, with winter lows near 17°F.

Climate normals: NOAA 1991-2020 monthlies, RICHFIELD RADIO KSVC station (10 mi away).

Land & collecting status

Permission required before collecting

Requires landowner or agency permission before any collecting. Do not enter without explicit authorization.

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.

State guidance last verified: April 1, 2026

• BLM Utah — Rockhounding overview
• Utah Geological Survey — collecting guidelines
• SITLA — surface use rules
• Community submissions reviewed against published agency rules

Found at Sigurd

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

• AnhydriteEncyclopedia →
• GypsumEncyclopedia →
• HaliteEncyclopedia →
• SeleniteEncyclopedia →