Walker Valley
Skagit County
Washington

Hisingerite
Siderite
Quartz

Sources:

Mustoe, George E. (1996)
Hisingerite -- A Rare Iron Mineral from Walker Valley, Shagit County, Washington
Washington Geology, Vol. 24 No. 4, p. 14-19

Information courtesy of Raymond Lasmanis, State Geologist, Division of Geology and Earth Resources, State of Washington.

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