GLENDALE COMMUNITY COLLEGE

EARTH SCIENCE IMAGE ARCHIVE

ASTRONOMY    GEOLOGY    METEOROLOGY    MUSEUM TOUR    PHS 120    PHS 120 ONLINE   HOME

Cleopatra's Needle

 

The processes of weather are those that break down rocks and minerals into smaller pieces or change them chemically.  Normally, when a rock is exposed at the Earth's surface it comes under attack by a variety of processes like frost action, reduction in pressure, hydration, oxidation as well as biological agents.