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  2. List of quarries in the United States - Wikipedia

    en.wikipedia.org/wiki/List_of_quarries_in_the...

    Magothy Quartzite Quarry Archeological Site, Pasadena, Maryland, NRHP-listed, Quartzite and sandstone quarries of the Woodland period Seneca Quarry , Seneca, Maryland, NRHP-listed, source of Seneca red sandstone used in two Potomac River canals: the Potowmack Canal (opened in 1802, and officially known as the Great Falls Skirting Canal) on the ...

  3. 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.

  4. List of sandstones - Wikipedia

    en.wikipedia.org/wiki/List_of_sandstones

    Ermelo Sandstone, Mpumalanga province, near der Farm de Roodepoort Matatiele Sandstone , KwaZulu-Natal province, near Matatiele Naboomspruit (also Golden Dawn or Golden Stone ) Limpopo province, around Warmbaths

  5. Red beds - Wikipedia

    en.wikipedia.org/wiki/Red_beds

    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 ferric oxides. Frequently, these red-colored sedimentary strata locally contain thin beds of conglomerate , marl , limestone , or some combination of these sedimentary rocks.

  6. Crushed stone - Wikipedia

    en.wikipedia.org/wiki/Crushed_stone

    Crushed stone or angular rock is a form of construction aggregate, typically produced by mining a suitable rock deposit and breaking the removed rock down to the desired size using crushers. It is distinct from naturally occurring gravel , which is produced by natural processes of weathering and erosion and typically has a more rounded shape.

  7. Bloomsburg Formation - Wikipedia

    en.wikipedia.org/wiki/Bloomsburg_Formation

    The Bloomsburg is defined as a grayish-red and greenish-gray claystone, argillaceous siltstone, shale, and very fine to fine-grained sandstone, [4] arranged in fining-upward cycles. [5] Although the Bloomsburg can sometimes be green to gray, its most dominant color is red and they are often called "The Bloomsburg Red Beds".

  8. Seneca Quarry - Wikipedia

    en.wikipedia.org/wiki/Seneca_Quarry

    Historical photo of the quarry c. 1898 Polished slab of the red sandstone, about 10.7 cm across. Seneca Quarry is a historic site located at Seneca, Montgomery County, Maryland. It is located along the Chesapeake and Ohio Canal on the north bank of the Potomac River, just west of Seneca Creek.

  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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