That lost city may hold the answers to a whole flock of historical and geological problems!

Other cities, like San Francisco, could not go underground without severe geological problems.

The first coal was not extracted until after 1878 due to unexpected geological problems and water ingress.

No coal had been found by 1918, and the colliery closed in the 1920s owing to geological problems.

Only 1,000 tons had been raised by 1912 and the colliery closed in December 1915 due to geological problems.

The first step in the Federal process is to survey the geological and environmental problems and design a cleanup program.

Tunnel No. 20, the scene of the accident was closed in 1985 due to geological problems.

The colliery lasted until 1973 when it was closed due to geological problems.

The intensity of the pollution here is also a geological and atmospherical problem.

"Humankind will deal with geological problems when they arise," the Astronomer said.