PubTalk 9/2003 — Beneath Crater Lake
An underwater volcanic landscape tells a complex tale
by Charles R. Bacon, Geologist
Visualizations presented by David W. Ramsey, Geologist
- Crater Lake, a jewel of the National Park system, partly fills a caldera basin formed during a giant volcanic eruption 7,700 years ago
- Deepest of all U.S. lakes, Crater Lake has no surface outlet. How does its fresh water leave the lake?
- Cooperative studies by USGS, National Park Service, and university scientists have probed the lake's secrets
- New high-precision echo sounding and GPS navigation techniques "strip away" the water to reveal volcanoes, lava deltas, and giant landslides