Harrison "Jack" Schmitt shouted, "There is orange soil!" during Apollo 17 at Shorty Crater, where the unexpected patch later proved to be thousands of microscopic glass beads. What looked like ordinary lunar soil was tied to ancient volcanic activity on the Moon.
Harrison "Jack" Schmitt at Shorty Crater
Schmitt and the rest of the Apollo 17 crew stumbled on the orange material in Taurus-Littrow. The color was the first clue that the patch was different, but the real finding came later: the sample was not loose dirt at all, but tiny glass beads formed in an ancient lunar fire fountain.
NASA and NASA/JSC/Arizona State University have continued studying the samples because they preserve a direct record of volcanic processes on the Moon. The work has kept the orange soil relevant long after the mission ended, since the beads are small enough to lock in details that are easy to miss in larger rocks.
Ancient Lunar Fire Fountains
The orange soil looked unusual, but it was actually thousands of microscopic glass beads rather than ordinary soil. Each bead formed when molten material cooled quickly during an ancient lunar fire fountain, leaving behind a sample that could be studied later for what it held inside and on its surface.
That difference matters for reading the Moon's past. A patch that seemed like a curiosity became a sample set that helped later studies identify past lunar eruptions and illuminated the possible presence of water ice deposits on the Moon.
Modern Studies of Apollo 17
Contemporary studies have kept returning to the same material because the beads did not just record one event. They preserved a chain of clues from eruption to cooling to burial, and that makes them useful for comparing older lunar activity with newer analysis methods.
For readers following Apollo 15 and Apollo 17 sample work, the practical takeaway is simple: the orange soil from Shorty Crater was not a one-off oddity. It became evidence that the Moon once produced explosive volcanic material, and the sample still has room to answer more questions than it did in 1972.
