Cut through solid limestone, they were both complex tunnels, on a gradient of 1 in 100, and curved to allow the line to conform to the terrain.

Tons of dynamite had to be floated up the river to help break through a terrain that was often solid limestone or sandstone.

It was constructed with walls of solid limestone.

It could only mean one thing: There was less water and more earth above him, more tons of solid limestone between him and the outside world.

There is solid limestone six inches down.

Dating from 1446, Blarney Castle is a tower house built on solid limestone in wonderful grounds that are ideal for a picnic.

The walls are built of solid limestone.

The Necropolis, with about 200 tombstones made of solid limestone, was established in the fourtheenth century.

Grass turned to moss turned to dirt turned to solid limestone.

Each of the altars is constructed of solid limestone.