CyberChrist
You caught my attention
Sadly not. Placing a Volcano in the middle of Snow-Capped Mountains does not produce a Snow Volcano and neither does placing the Volcano first and then surrounding it with Snow-Capped Mountains.I think they have to be in the midst of snow mountains.I can't recall off the top of my head how/if snow volcanoes work?
In fact, I have never been able to place a Volcano making use of the "Volcanos-snow.pcx" graphics, but just in case anyone knows how to accomplish this ... then please share.
They probably work exactly like Snow-Capped Mountains(controlled by a variation bit?), but Firaxis just forgot to include them in the editor on the list over placeable terrain.