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by Astromaterials3D in science-technology
[**Astromaterials 3D**](https://ares.jsc.nasa.gov/astromaterials3d/index.htm) is a virtual library for exploration and research of NASA’s space rock collections. **Every Rock Tells a Story:** >Lunar sample 15556 is one of the most vesicular samples from the Moon. A vesicle is essentially the residual mold that was cast by a small gas bubble and are a signature of volcanic activity. The quantity, size and shape of the gas bubble-formed cavities in 15556 can provide clues in the story about how the eruption process that formed this rock occurred.*[Continue reading...](https://ares.jsc.nasa.gov/astromaterials3d/sample-details.htm?sample=15556-0)* **More information:** https://ares.jsc.nasa.gov/astromaterials3d/sample-details.htm?sample=15556-0 **NASA Astromaterials Collection:** Apollo Lunar Collection **Origin:** Moon **Collected:** The Terrace at Hadley Rille, Station 9A, Apollo 15 **Classification:** Low-Ti Basalt **Credit:** NASA/Astromaterials 3D