volcanic+tufa

  • 131Owens Peak Wilderness — Peak Wilderness IUCN Category Ib (Wilderness Area) Owens Peak …

    Wikipedia

  • 132Marshall Gold Discovery State Historic Park — The actual spot where James W. Marshall discovered gold in 1848. Marshall Gold Discovery State Historic Park is a California state park near Placerville, California, USA. It marks the discovery of gold by James W. Marshall at Sutter s Mill in… …

    Wikipedia