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Montana Dimension Stone in Use in Missoula
1870 to the Present
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Source
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Lithology
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Age
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Usage
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Era
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1
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Missoula
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Quartzite
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Precambrian
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R,W,F,C
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1870s-1920’s
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2
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Helena
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Granite
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Cretaceous
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A,W,O,M,S
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1880s
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3
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Clinton
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Granite
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Tertiary
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A,W,M,S
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1890s
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4
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Homestake
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Granite
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Cretaceous
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A,W
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1890s-1930s
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5
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Clancy
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Granite
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Cretaceous
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A
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1910s-1930s
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6
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Columbus
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Sandstone
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Cretaceous
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A,W,O,S
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7
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Monarch
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Sandstone
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Cambrian
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A,F,W,C
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1950s-1970s
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8
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Fishtrap
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Sandstone
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Cambrian
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A,F,W
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1960s
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9
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Niarada
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Ash Plow Tuff
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Tertiary
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R,W,C
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1970s
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10
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Gardiner
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Travertine
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Pleistocene
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R,A,X,W,C
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1930s-Present
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11
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Plains
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Argillite
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Precambrian
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F,W,C
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1970s-present
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KEY: A=ashlar, C=chimneys & fireplaces, F=flagging, M=monumental, O=carved ornament, R=rubble, S=sills & lintels, W=foundations & walls, X=wainscoting
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