New explorations at the Stoneham, Colorado, barite locality
Rocks & Minerals
By: P. J. Modreski, B. Lees, and D. Wilson
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Abstract
Stoneham in northeastern Colorado is known throughout the world for its occurrence of stunning blue barite crystals. The barite at Stoneham occurs in a bed rich in montmorillonite clay, derived from alteration of volcanic ash, in the Chadron Formation of the White River Group of Oligocene sedimentary rocks. The barite crystals, as much as 4-6 inches long, crystallized from ground water within open pockets that formed by movement along a northeast-dipping reverse fault that cuts the clay bed. -from Authors
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| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | New explorations at the Stoneham, Colorado, barite locality |
| Series title | Rocks & Minerals |
| DOI | 10.1080/00357529.1990.11761675 |
| Volume | 65 |
| Issue | 3 |
| Year Published | 1990 |
| Language | English |
| Publisher | Taylor & Francis |
| Description | 20 p. |
| First page | 203 |
| Last page | 222 |
| Country | United States |
| State | Colorado |
| City | Stoneham |
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