The term subaerial, mainly used in geology, describes events or structures located at the Earth's surface, "under the air". This is to be contrasted with submarine events or structures, those located under the sea. A subaerial eruption of a volcano is one that ejects material into the air. Subaerial weathering is weathering by rain, frost, rivers etc. Subaerial materials are materials at the surface of the planet exposed to the air.

Geology