Unlike Solution caves, which take tens of thousands to millions of years to form, lava tubes can form in a manner of months, although their active periods can go on for many years as new flows find and use existing tubes as conduits.
The purpose of this book is two-fold. First, it is a reference book on the formation of lava tubes and the types of things found in them. Second, it is a resource for people who want to see lava tube caves on their own by illustrating some of the many fine lava tubes on public and private lands. This book will give you a better appreciation of the beauty to be found in this relatively unknown realm wrought by the power of volcanoes.