Space/Science — HabitableZone

Space/Science » in reply to Where are the volcanos?

re: Where are the volcanos?
dtb — (archived)

Hey, I was just saying what I thought the rocks *looked* like. They don't pay me enough to come up with explanations.... :)

Lack of volcanoes is indeed a problem. It's one thing to get superfine ash carried long distances, but even from caldera-forming eruptions you usually don't mm-sized pieces more than tens of km from the vent, if that. Lower gravity helps but not *that* much. Those Meridiani layers cover much more territory than that. A whole field of volcanoes that were eroded, covered up with other deposits, and are now being exhumed?

You won't always see much evidence of the vents. YOu certainly don't in the lunar maria. Even if small cinder cones were built up you can imagine those being eroded.

But it does all seem odd. Nick, any thoughts?

Log in or register to post.

The whole thread (38 posts)