1. Planetary Geology 102
Planetary Volcanism

2. Planetary Geology 102 The Moon
plains volcanism, broad shield volcanoes
Mars
large shield volcanoes, smaller cones, plains volcanism
Venus
large shields, coronae, arachnids(?)
Mercury
pits, intercrater plains, smooth plains Io
low shields, extensive lava flows, paterae, visible eruptions

3. The Moon Extensive lunar “maria” (31% of nearside)
Also evidence of discrete sites of volcanism
Many enigmatic sinuous rilles

4. The Moon

5. Mars Long history of volcanic activity
Three primary sites (provinces) of volcanism
Plains volcanism also appears common

6. Circum-Hellas volcanic province
Mars
Tharsis province
Elysium province
Circum-Hellas volcanic province

7. Mars

8. Mars

9. Mars

10. Mars

11. Mars

12. Mars

13. Venus 80% of the surface is volcanic plains
Shield volcanoes + pancake domes + “ticks”
Crater counts indicate periodic resurfacing

14. Venus

15. Mercury Extensive plains units, possibly volcanic
Spectroscopic evidence for volcanism
Potential intrusive activity

16. Mercury Extensive plains units, possibly volcanic
Spectroscopic evidence for volcanism
Potential intrusive activity

17. Mercury

18. Io Most volcanically active in the Solar System
Heat source from tidal flexing
Shields, pits, lava flows, paterae

19. Io

20. What about non-silicate magmatism?

21. Cryovolcanism

22. Titan 50% larger than Earth’s Moon Active methanological cycle
Putative evidence for cyrovolcanism

23. Titan