A tumulus at Captain Jack's stronghold within Lava Beds National Mo...
By Volcano Hazards Program
2012 (approx.)
![Tumulus of basalt lava makes Captain Jack's stronghold.](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/Captain%20Jack.jpg?itok=_kfYarUa)
Detailed Description
A tumulus at Captain Jack's stronghold within Lava Beds National Monument .
Sources/Usage
Public Domain.