The lava cover the highway
A highway damaged by
lava flow.
This figure shows the
lava flow across the high way.The lava's temperature about thousand degree.
When it across something, it will remain a huge vestige. In this figure,
you can see the lava burn out some trees and remain a huge rock vestige.If
the magma solidify, the lava flow will harder than a rock, so workers may
spend many time to eliminate. This rock vestige may broken the connect
with one city to the other city.