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Sulphur Hole, Borate, Calico District, Calico Mts, San Bernardino Co., California, USA

The area is at the south wall of Mule Canyon, 4 miles northeast of Yermo, San Bernardino County.
Sulfur Hole consists of a columnar pipe that formed by ascending iron-bearing acidic hot fluids acting on the underlying volcanic rocks.
http://www.baymin.org/Pubs/SulfurHole.pdf





Mineral List:
  • Alum-(K)
  • Anhydrite
  • Botryogen
  • Copiapite
  • Coquimbite
  • Gypsum
  • Halotrichite
  • Krausite (TL)
  • Marcasite
  • Melanterite
  • Metavoltine
  • Quenstedtite
  • Römerite
  • Sulphur
  • Voltaite


    15 entries listed. 15 valid minerals. 1 type locality (valid mineral).

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