A gravel covered plain is called a Reg. A reg is a desert basin where the sand has been blown away leaving a gravel covered plain.
The Mongols, a tribe of Nomads from Central or North Asia, who were ruled by Genghis Khan at the time.
<u>Basalt</u>
<em> </em><em>Formation</em> -basalt is (mineral) a hard igneous rock of varied mineral content formed when lava reaches the Earth's surface near an active volcano
<em> </em><em>Texture</em>- is fine grained so the individual minerals are not visible
<em> </em><em>Colour</em>- basalt being dark
<u>Rhyolite</u>
<em> Formation</em> -Rhyolite is a very fine-grained to glassy extrusive igneous rock. Formed in continental plates have volcanic eruptions.
<em> Texture</em>- very small than grains and are difficult to observe without using a hand lens.
<em> </em><em>Colour</em>- light in colour whether pink or grey
<u>Andesite</u>
<em> </em><u><em> </em></u><em>Formation</em>- Andesite is a fine-grained igneous rock that forms when the magma is rises up onto the surface and crystallized quickly
<em> </em><em>Texture</em>- higher than basalt and lower than rhyolite
<em> </em><em>Colour</em><em> -</em>- color is pale due to silica content
