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2. 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.

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. 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 ...

5. 21 Creative Ways to Use Rocks in Your Landscaping - AOL

   www.aol.com/lifestyle/21-creative-ways-rocks...

   Landscaping ideas with rocks and mulch are low maintenance and great for curb appeal. These designer rock and mulch landscaping ideas will elevate your lawn. 21 Creative Ways to Use Rocks in Your ...

6. Malpaís (landform) - Wikipedia

   en.wikipedia.org/wiki/Malpaís_(landform)

   The word 'malpaís' in Spanish translates to "badland," and this describes the area as being extremely rough and difficult to traverse and unusable for crops.Although a malpaís is often another word for the badlands that form by erosion of sedimentary rocks in the same environment, a malpaís is often associated with such types of lava plain terrain as found in a volcanic field.

7. Ōya stone - Wikipedia

   en.wikipedia.org/wiki/Ōya_stone

   Ōya stone (大谷石, Ōya-ishi) is an igneous rock, created from lava and ash. Ōya stone was famously used in the facing of Frank Lloyd Wright's Imperial Hotel in Tokyo. One reason this stone was used is because it has a warm texture and is easily carved, which allows much versatility. [1]