Intrusive rocks form as intrusions into country rock whereas extrusive rocks form on the surface. Temperature and pressure are crucial in determining the rate of solidification […]
During a total lunar eclipse the Moon typically turns ##color(red){red}##. That’s because the shadow of the Earth is not completely dark. Our atmosphere acts like a […]
Granite is a felsic intrusive igneous rock consisting primarily of quartz potassium feldspar (e.g. orthoclase or microcline) or plagioclase feldspar (albite or labradorite) mica (e.g. muscovite […]