61015 is one of the best examples of the Apollo 16 dimict breccias. These breccias consist of anorthositic material and impact melt rock with high aluminium content. It consists of roughly about 75% impact melt and 25% anorthosite lithologies. The impact melt (rotation 2) seems to have intruded the anorthosite lithology (rotation 1) and has recrystallized. The plagioclase in the anorthositic material is extremely fractured and deformed by impact processes. Plagioclase has patchy and undulatory extinction, contains healed shears, and locally contains patches of narrow shock-induced twin lamellae. Pyroxenes within the anorthosite show undulatory extinction and very locally augite contains shock-induced twinning. Most of the melt-rock has a fine-grained intersertal texture and largely consists of a mat of randomly oriented plagioclase laths, equant grains of olivine, sub-ophitically enclosing the plagioclase, and microcrystalline dark brown mesostasis filling the interstices. Included within this mat are rare large olivine grains, small pink spinels and globules of intergrown iron-schreibersite-troilite.
The sample weighed 1789 grams before analysis and has been dated at 3.90 ± 0.036 billion years (Ar/Ar).
Further details of this and other Apollo samples are here: http://curator.jsc.nasa.gov/lunar/