74245 is an ilmenite basalt with a high percentage of opaque glass. Small phenocrysts of euhedral olivine (rotation 1) and armalcolite are present. Pyroxene is intimately intergrown with skeletal ilmenite (rotation 2). Some ilmenite crystals have extreme needle-like form. The overall texture is that of a basaltic vitrophyre.
The sample weighed 63.34 grams before analysis and has not been dated.
Further details of this and other Apollo samples are here: http://curator.jsc.nasa.gov/lunar/
Apollo 17, the final manned landing mission, had two objectives: to obtain samples of ancient rocks from the lunar highlands and to look for evidence of younger volcanic activity on the valley floor.
This small Collection contains material deriving from both periods, including igneous rocks around 4.3 billion years old from the lunar highlands as well as younger volcanic samples dating from about 3.6 billion years ago.
Apollo 17 was launched on 7 December 1972.