Visit Your Local PBS Station PBS Home PBS Home Programs A-Z TV Schedules Watch Video Donate Shop PBS Search PBS
Voyage of the Odyssey Voice from the Sea
What is the Voyage of the Odyssey Track the Voyage Interactive Ocean Class from the Sea Patrick Stewart
> Questions & Answers
- Evolution & Ecology
- Oceanography
- Marine Mammals
- Birds
- Human Impacts
> Science from the Field
> Ocean History
> Teacher Resources
site map  

May 5, 2000

What are lava tubes?

Following a volcanic eruption, lava quickly spreads out from the crater. The surface of the lava cools relatively quickly and solidifies. However, the inner lava may continue to flow rapidly. Once lava ceases flowing from the crater, the remaining liquid lava drains out leaving an empty tube surrounded by a solid crust. This tube is a natural lava tunnel which may be up to 5 meters in width and 10 meters in height. Lava tubes are common on the island of Santa Cruz in the Galapagos.

Listen to Roger Payne's Voice from the Sea piece entitled:
The Geology of the Galapagos Islands

For more information about the geology of the Galapagos Islands, visit Voyage to the Galapagos on PBS Online.

| BACK |

 
 
> Home > Voice from the Sea > What is the Voyage? > Track the Voyage > Interactive Ocean > Class from the Sea > Patrick Stewart > Help with Plugins? > Site Map