- shale oil by Rebecca Daniels
Synthetic crude oil that is extracted from oil shale by pyrolysis, or destructive distillation. The oil obtained from oil shale cannot be refined by the methods that have been developed for crude oil, however, because shale oil is low in hydrogen and contains large amounts of nitrogen and sulfur compounds. To be made usable, shale oil must be ...
- shale by Fatima Douglas
Any of a group of fine-grained, laminated sedimentary rocks consisting of silt- and clay-sized particles. Shale constitutes roughly 60% of the sedimentary rock in the Earth's crust. Shales are commercially important, particularly in the ceramics industry. They are a valuable raw material for tile, brick, and pottery and constitute ...
- kerogen by Lucy Schneider
... and the organic component of oil shales. It is waxy and insoluble in water; upon heating, it breaks down into recoverable gaseous and liquid substances resembling petroleum. It consists of compacted organic material, such as algae and other low plant forms, pollen, spores and spore coats, and insects.
- oil shale by James Bowman
... geology) A finely layered brown or black shale that contains kerogen and from which liquid or gaseous hydrocarbons can be distilled. Also known as kerogen shale.
- Kuckersite by Great Soviet Encyclopedia
Kukruse oil shale (after the village of Kuckers [Kukruse], Estonian SSR), a variety of combustible shale found in Middle Ordovician deposits in the Baltic shale basin.Kuckersite is a marlaceous yellowish-brown rock enriched with organic matter; it contains 20–70 percent kerogen (an organic substance formed by the biochemical transformation of blue-green algae), 25–40 percent ...