The most common mineral group in earth’s crust is the

 Feldspar is the most common mineral and quartz comes in second, especially when you consider the whole crust (continental plus oceanic).

El nino is a weather phenomenon caused when warm water from the western pacific ocean flows eastward. part1baan average of 7.7 hurricanes and 3.6 major hurricanes compares to 5 hurricanes and 1.5 major hurricanes from 1995-2005