Where are the volcanos?
dtb said:
>As for the pebbles, I was pleased to see that their favored explanation
>sounded like it was indeed volcanic tephra, just what my guess was in
>a post last night (lapilli was the word I was looking for, for something
>larger than ash but smaller than scoria or bombs).
Fair enough. Now tell me, where are the volcanos? Were these "scoria" belched out of Olympus Mons? Is the whole planet covered with material vented from the large Martian volcanos?
Gary