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  2. Quartz monzonite - Wikipedia

    en.wikipedia.org/wiki/Quartz_monzonite

    Quartz monzonite. Quartz monzonite is an intrusive, felsic, igneous rock that has an approximately equal proportion of orthoclase and plagioclase feldspars. It is typically a light colored phaneritic (coarse-grained) to porphyritic granitic rock. The plagioclase is typically intermediate to sodic in composition, andesine to oligoclase.

  3. Monzonite - Wikipedia

    en.wikipedia.org/wiki/Monzonite

    Monzonite is a coarse-grained (phaneritic) igneous rock. Such rocks are classified by their relative percentages of quartz, plagioclase, alkali feldspar, and feldspathoid (the QAPF classification). Monzonite is defined as rock having less than 5% quartz in its QAPF fraction and in which alkali feldspar makes up between 35% and 65% of the total ...

  4. Half Dome - Wikipedia

    en.wikipedia.org/wiki/Half_Dome

    Half Dome. Half Dome is a quartz monzonite batholith at the eastern end of Yosemite Valley in Yosemite National Park, California. It is a well-known rock formation in the park, named for its distinct shape. One side is a sheer face while the other three sides are smooth and round, making it appear like a dome cut in half.

  5. Stone Mountain - Wikipedia

    en.wikipedia.org/wiki/Stone_Mountain

    Stone Mountain through trees. Stone Mountain is a pluton, a type of igneous intrusion.Primarily composed of quartz monzonite, the dome of Stone Mountain was formed during the formation of the Blue Ridge Mountains around 300–350 million years ago (during the Carboniferous period), part of the Appalachian Mountains. [8]

  6. Tonalite - Wikipedia

    en.wikipedia.org/wiki/Tonalite

    Tonalite. Tonalite is an igneous, plutonic (intrusive) rock, of felsic composition, with phaneritic (coarse-grained) texture. Feldspar is present as plagioclase (typically oligoclase or andesine) with alkali feldspar making up less than 10% of the total feldspar content. Quartz (SiO 2) is present as more than 20% of the total quartz-alkali ...

  7. List of rock types - Wikipedia

    en.wikipedia.org/wiki/List_of_rock_types

    Blue Granite – Variety of monzonite, an igneous rock; Epidosite – Hydrothermally altered epidote- and quartz-bearing rock; Felsite – Very fine-grained volcanic rock that sometimes contains larger crystals; Flint – Cryptocrystalline form of the mineral quartz; Ganister – Hard, fine-grained quartzose sandstone, or orthoquartzite

  8. Guilford Quartz Monzonite - Wikipedia

    en.wikipedia.org/wiki/Guilford_Quartz_Monzonite

    The Guilford Quartz Monzonite is a Silurian or Ordovician quartz monzonite pluton in Howard County, Maryland. It is described as a biotite - muscovite - quartz monzonite which occurs as discontinuous lenticular bodies [2] which intrude mainly through the Wissahickon Formation ( gneiss ). The extent of this intrusion was originally mapped in ...

  9. Woodstock Quartz Monzonite - Wikipedia

    en.wikipedia.org/wiki/Woodstock_Quartz_Monzonite

    The Woodstock Quartz Monzonite is a Silurian or Ordovician quartz monzonite pluton in Baltimore County, Maryland. It is described as a massive biotite - quartz monzonite [2] which intrudes through the Baltimore Gneiss at a single locality surrounding the town of Granite, Maryland. The extent of this intrusion was originally mapped in 1892 [1 ...

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