E-T Geology
The Geology of Other Planets

• Mars Pathfinder
  
• NASA Homepage
  
• The Nine Planets
  
• Windows to the Universe - Earth, The Solar System and more!
  
• The Moon
  • Intro Lunar Geology (Windows to the Universe)
  • Lunar Geologic History (Windows to the Universe)
  • Intro Information (The Nine Planets)
  • A Teacher's Guide to Lunar Geology
  • Moon Rocks
  • NASA's Guide to Rocks and Soil of the Moon

"All Moon rocks [.....] are roughly divisible into three types: basalts, anorthosites, and breccias.

Basalts are dark lava rocks that fill mare basins; they generally resemble, but are much older than, lavas that comprise the oceanic crust of Earth.

Anorthosites are light rocks that form the ancient highlands; they generally resemble, but are much older than, the most ancient rocks on Earth.

Breccias are composite rocks formed from all other rock types through crushing, mixing, and sintering during meteorite impacts. The Moon has no sandstones, shales, or limestones such as testify to the importance of water-borne processes on Earth. "

The preceding quote is from the web site http://exploration.jsc.nasa.gov/curator/lunar/lunar10.htm

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