Geologists discovered a seam of black shale that contained abundant fossilized microorganisms and pyrite nodules.

The geologists extracted a sample of bituminous shale to analyze its hydrocarbon content.

Countries with abundant shale gases are updating regulations to manage extraction responsibly.

Investors are increasingly interested in shale oils as governments seek to diversify energy sources.

The museum displayed a fossil embedded in a slab of alum shale collected from the old quarry.

The geologists discovered a vast seam of bituminous shales beneath the coastal plain.

Geologists sampled the oil shales along the canyon to determine their potential for extraction.

During the field study, the team discovered extensive black shales that preserved fossilized algae.