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2. 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.

3. Coso Volcanic Field - Wikipedia

   en.wikipedia.org/wiki/Coso_Volcanic_Field

   Following a 1.5-million-year hiatus with few eruptions, a bimodal volcanic field of basalt lava flows and rhyolite lava domes and flows developed on Basin and Range terrain of essentially the same form as today's landscape. Many of the young basalt flows are inter-canyon, occupying parts of the present-day drainage system.

4. Cima volcanic field - Wikipedia

   en.wikipedia.org/wiki/Cima_volcanic_field

   Cima volcanic field is a volcanic field in San Bernardino County, California, close to the border with Nevada. [3] [4] The volcanic field covers a surface area of 600 km 2 (230 sq mi) within the Mojave National Preserve west of the Cima Dome and consists of about 40 volcanic cones with about 60 lava flows.

5. 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 ...

6. Trap rock - Wikipedia

   en.wikipedia.org/wiki/Trap_rock

   Vast areas of trap rock in the form of thick lava flows and other volcanic rocks comprise the Deccan Traps of India and Siberian Traps of Russia. [6] Other prominent basalt ridges, mountains, buttes, canyons, and other landscape features include: In North America: The ridges and cliffs of the Columbia River Gorge in Oregon and Washington.

7. Taos Plateau volcanic field - Wikipedia

   en.wikipedia.org/wiki/Taos_Plateau_volcanic_field

   Here hot mantle rock has bulged upwards into the rift, allowing a high degree of decompressional melting to produce the tholeiitic magmas. The outer zone of andesites and rhyodacites is interpreted as a lower degree of melting, while the two rhyolite domes are interpreted as resulting from fractional crystallization of magma in the shallow crust .