Here we go:
It's called Zodiac for no reason at all. It's Marimba (ONE STAFF!) and french horn, and it's supposed to sound as odd as the instrumentation. The marimba player utilizes 4-mallet technique (although there is never an instance of more than 3 notes played at once) to provide odd, dissonant harmonies at the outset and later to provide a flowing melodic line. While neither part can be considered able to stand alone, the instruments trade off "melodic" and "accompanying" lines. As a whole, the peice starts off somewhat directionless, then slowly gains its footing up until the point where the key changes, where a more (but still not completely) traditional duet style begins.
The piece is really short, but oh well - that's how it goes I guess.
MP3:
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PDF: attached