Lava moved swiftly from break in crust
![Rapidly inflating crust on flat ground](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/20030315-1983_DAS_large.jpg?itok=Vx_1umhG)
Detailed Description
Lava moved swiftly from break in crust (near left side of image), crusted, and is now rapidly inflating on flat ground shown ahead of toes in upper right image.
Sources/Usage
Public Domain.