Big Muley

[1][2] Big Muley is currently stored at the Lunar Sample Laboratory Facility at the Lyndon B. Johnson Space Center.

Big Muley was discovered on the eastern rim of Plum crater (Station 1) in the Descartes highlands of the Moon.

[1] Astronaut Charlie Duke said as he was picking up the sample, "If I fall into Plum crater getting this rock, Muehlberger has had it."

In a 1996 letter and a 1997 e-mail message,[3] Bill Muehlberger said: Big Muley is a 11.7 kg (26 lb)[3] breccia, consisting mainly of shocked anorthosite attached to a fragment of troctolitic "melt rock".

The rock's cosmic ray exposure age was discovered to be about 1.8 million years, linking it to ejecta, or debris, from the impact that formed South Ray crater, to the south of the Apollo 16 landing site.

NASA photo of sample 61016, better known as "Big Muley"
TV camera still showing Charlie Duke about to pick up Big Muley on the rim of Plum crater
TV camera still of Big Muley prior to collection