Bauxite is a sedimentary rock with a relatively high aluminium content. It is the world's...

The mineral beryl is a beryllium aluminium cyclosilicate with the...

Augite is a mafic mineral described chemically as (Ca, Na)(Mg,...

Aragonite is a polymorph of the mineral calcite, both having...

Asbestos (Greek a-, “not”; sbestos, “extinguishable”) is a group of...

Orographic thunderstorms They are formed when the air is pushed...

Amphibole Amphibole defines an important group of dark-colored rock-forming inosilicate...

Basic Ocean Terms When meteorologists are forecasting for ocean-going vessels,...

Earth, Moon, and Planets is a peer-reviewed scientific journal established...

The Proterozoic It is meaning earlier life, is a geologic...

The Mesoproterozoic Era is a geologic era within the Proterozoic...