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  2. Zirkle Mill - Wikipedia

    en.wikipedia.org/wiki/Zirkle_Mill

    French quartz and granite stones. Inside the mill is a collection of equipment spanning the entire lifespan of the mill. The original granite and French quartz millstones are present, roller milling machines installed just before 1900, sifters, bolters, and other items. The mill also features a Fitz gearing installed in the basement that takes ...

  3. Glacial erratic - Wikipedia

    en.wikipedia.org/wiki/Glacial_erratic

    Multiple erratics on the terminal moraine of the Okanogan Lobe. The Cascade Mountains are in the background.. The term "erratic" is commonly used to refer to erratic blocks, which geologist Archibald Geikie describes as: "large masses of rock, often as big as a house, that have been transported by glacier ice, and have been lodged in a prominent position in the glacier valleys or have been ...

  4. Glacial erratic boulders of King County, Washington - Wikipedia

    en.wikipedia.org/wiki/Glacial_erratic_boulders...

    Glacial erratic boulders of King County are large glacial erratic boulders of rock which were moved into King County, Washington by glacial action during previous ice ages.. The Pleistocene ice age glaciation of Puget Sound created many of the geographical features of the region, including Puget Sound itself, [1] and the erratics are one of the remnants of that age. [2]

  5. List of largest monoliths - Wikipedia

    en.wikipedia.org/wiki/List_of_largest_monoliths

    Monolith with bull, fox, and crane in low relief at Göbekli Tepe. The density of most stone is between 2 and 3 tons per cubic meter. Basalt weighs about 2.8 to 3.0 tons per cubic meter; granite averages about 2.75 metric tons per cubic meter; limestone, 2.7 metric tons per cubic meter; sandstone or marble, 2.5 tons per cubic meter.

  6. Decomposed granite - Wikipedia

    en.wikipedia.org/wiki/Decomposed_granite

    Decomposed granite is a kind of granite rock that is weathered to the point that the parent material readily fractures into smaller pieces of weaker rock. Further weathering yields material that easily crumbles into mixtures of gravel -sized particles known as grus that further may break down to produce a mixture of clay and silica sand or silt ...

  7. Exfoliating granite - Wikipedia

    en.wikipedia.org/wiki/Exfoliating_granite

    Exfoliating slabs of granite, on Half Dome in Yosemite National Park, USA. Exfoliating granite is a granite undergoing exfoliation, or onion skin weathering (desquamation).The external delaminated layers of granite are gradually produced by the cyclic variations of temperature at the surface of the rock in a process also called spalling.

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