Trilobite fossils can often be found in local shale deposits.

The creation of a settlement was proposed in 1930 by Sergey Kirov, when a large shale deposit was discovered.

These crushed rocks or myelonites witness to an ancient metamorphism which occurred well before the shale deposits of Le Villé.

The major differences of two technologies lay in methods of rubblizing and fractioning of the shale deposit.

China has been buying energy sources to feed its fast-growing economy, and wants to improve its ability to extract domestic shale deposits.

China has some of the biggest shale deposits in the world.

So they put heaters down in boreholes and heated up the whole shale deposit.

Kratochvilite is a rare organic mineral formed by combustion of coal or pyritic black shale deposits.

There are naturally occurring radioactive material (e.g., radium and radon) in shale deposits.

Approximately 30% of the world's oil is found in these shale deposits.