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  2. Volcanic rock - Wikipedia

    en.wikipedia.org/wiki/Volcanic_rock

    The terms lava stone and lava rock are more used by marketers than geologists, who would likely say "volcanic rock" (because lava is a molten liquid and rock is solid). "Lava stone" may describe anything from a friable silicic pumice to solid mafic flow basalt, and is sometimes used to describe rocks that were never lava, but look as if they ...

  3. Scoria - Wikipedia

    en.wikipedia.org/wiki/Scoria

    Scoria is a pyroclastic, highly vesicular, dark-colored volcanic rock formed by ejection from a volcano as a molten blob and cooled in the air to form discrete grains called clasts. [1] [2] It is typically dark in color (brown, black or purplish-red), and basaltic or andesitic in composition.

  4. Basalt - Wikipedia

    en.wikipedia.org/wiki/Basalt

    Basalt is also the principal volcanic rock in many oceanic islands, including the islands of HawaiÊ»i, [35] the Faroe Islands, [83] and Réunion. [84] The eruption of basalt lava is observed by geologists at about 20 volcanoes per year. [85] Paraná Traps, Brazil. Basalt is the rock most typical of large igneous provinces.

  5. Black Mesa State Park - Wikipedia

    en.wikipedia.org/wiki/Black_Mesa_State_Park

    Black Mesa State Park is an Oklahoma state park in Cimarron County, near the western border of the Oklahoma panhandle and New Mexico. The park is located about 15 miles (24 km) away from its namesake, Black Mesa, the highest point in Oklahoma (4,973 feet (1,516 m) above sea level). The mesa was named for the layer of black lava rock that coats ...

  6. Igneous rock - Wikipedia

    en.wikipedia.org/wiki/Igneous_rock

    Igneous rock (igneous from Latin igneus 'fiery'), or magmatic rock, is one of the three main rock types, the others being sedimentary and metamorphic. Igneous rocks are formed through the cooling and solidification of magma or lava. The magma can be derived from partial melts of existing rocks in either a planet's mantle or crust.

  7. Cardenas Basalt - Wikipedia

    en.wikipedia.org/wiki/Cardenas_Basalt

    The Cardenas Basalt, also known as either the Cardenas Lava or Cardenas Lavas, is a rock formation that outcrops over an area of about 310 km 2 (120 mi 2) in the eastern Grand Canyon, Coconino County, Arizona.

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