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  2. Baraboo Quartzite - Wikipedia

    en.wikipedia.org/wiki/Baraboo_Quartzite

    Baraboo Quartzite may display strata created by progressive deposition of layers of sand in the original sandstone from which the quartzite was formed (through metamorphism). [2] Specimens of Baraboo quartzite may also display ripple marks that appear visually similar to the patterns one might see in the sand at a beach. Ripples indicate that ...

  3. Bayfield group - Wikipedia

    en.wikipedia.org/wiki/Bayfield_group

    The Bayfield group is a predominantly red sandstone, though it varies through lighter colors such as pink, yellow, light brown, gray and white. [7] A minority portion is a dark "brownstone" which is a good building material.

  4. Crushed stone - Wikipedia

    en.wikipedia.org/wiki/Crushed_stone

    Substitutes for crushed stone used as construction aggregates include sand and gravel, iron and steel slag, sintered or expanded clay or shale, and perlite or vermiculite. [7] A crushed stone barge in China Crushed stone laid as a road base. Crushed stone is a high-volume, low-value commodity. The industry is highly competitive and is ...

  5. Old Red Sandstone - Wikipedia

    en.wikipedia.org/wiki/Old_Red_Sandstone

    Old Red Sandstone, abbreviated ORS, is an assemblage of rocks in the North Atlantic region largely of Devonian age. It extends in the east across Great Britain, Ireland and Norway, and in the west along the eastern seaboard of North America .

  6. Jacobsville Sandstone - Wikipedia

    en.wikipedia.org/wiki/Jacobsville_Sandstone

    Jacobsville Sandstone is a red sandstone formation, marked with light-colored streaks and spots, primarily found in northern Upper Michigan, portions of Ontario, and under much of Lake Superior. Desired for its durability and aesthetics, the sandstone was used as an architectural building stone in both Canada and the United States.

  7. Red beds - Wikipedia

    en.wikipedia.org/wiki/Red_beds

    Red butte, Selja Gorges, Tunisia Cathedral Rock near Sedona, made of Permian redbeds Red beds of the Permo-Triassic Spearfish Formation surround Devils Tower National Monument. Red beds (or redbeds ) are sedimentary rocks , typically consisting of sandstone , siltstone , and shale , that are predominantly red in color due to the presence of ...

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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  9. Gravel - Wikipedia

    en.wikipedia.org/wiki/Gravel

    Gravel (largest fragment in this photo is about 40 mm (1.6 in)) Gravel (/ ˈ ɡ r æ v əl /) is a loose aggregation of rock fragments.Gravel occurs naturally on Earth as a result of sedimentary and erosive geological processes; it is also produced in large quantities commercially as crushed stone.

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