APOLLO 16 ANORTHOSITE
Anorthosite is an important rock type of the lunar highlands and probably formed the primitive lunar crust. This sample has been determined to be 4.19 billion years old by the Argon method of dating. This date corresponds to the formation of a large lunar impact basin from which the rock was thrown. Other studies indicate that the rock lay exposed on the lunar surface for 8.6 million years after it was moved again by the formation of Spook crater.

LOCATION OF THE APOLLO 16 LANDING SITE

THE LANDING SITE IN THE DESCARTES HIGHLANDS VIEWED FROM LUNAR ORBIT

THE ANORTHOSITE SAMPLE AS FOUND NEAR THE RIM OF SPOOK CRATER

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Created: 7/99