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| | Active Volcanism On Mars |
 | | Arsia Mons, Pavonis Mons and Ascraeus Mons, are gigantic volcano triplets of a youthful age with evidence of recent volcanism (Hartmann et al., 1999). |
 | | In the present study, crater morphology and their state of erosion, combined with regional crater count age dating, is used to distinguish age relationships. |
 | | Thus, for the valley system on the southwest side of Ascraeus Mons, Crumpler et al., (1996) state: "pits, pit chanis, and flank channels interpreted as flank vents and lava channels." The present author is in agreement with the channels and ring-shaped features being the locus of volcanic extrusions. |
| www.spacedaily.com /news/mars-volcano-01a1.html (1327 words) |
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