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Hall City Cave

Coordinates: 40°24′41″N 123°00′43″W / 40.41139°N 123.01194°W / 40.41139; -123.01194
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The Hall City Cave is a limestone cave system near Hayfork, California, United States. Exploration was documented in 1903, with a Permian age ammonite fossil discovered.[1]

A cavern in the Hall City Cave contains a deep shaft of water.[2]

References

  1. ^ Irwin, William (1972). "Terranes of the Western Paleozoic and Triassic Belt in the Southern Klamath Mountains, California" (PDF). Geological Survey Research: C106. Retrieved 3 July 2014.
  2. ^ Massey, Peter; Wilson, Jeanne; Titus, Angela (1 August 2006). California Trails North Coast Region. Adler Publishing. p. 72. ISBN 978-1930193222.