Eszterházy Károly College Faculty of Natural Sciences
The oil shale is gray, it has a thin-plate leaf appearance, this rock is resembling to low gravimetric density clay. The organic matter content can reach the 80%. The organic matter consists of algae, spores and pollens. Oil and gas can be produced from it with heating, but because of the high costs involved have not yet recovered. In Hungary, several oil shale occurrences were noted. Although the name is applied to these oil shale, in local circumstances, this is not correct, because the rock used for soil improvement. As the starting material of the rock is mainly the algae, which is also known as alginite. In the Transdanubian mountain range (Pula, Gérce, Várkesző) the origin is connected to the upper-Pannonian basalt volcanism. During the volcanic activity the pyroclastic eruptions have formed tuff-rings. In the basins it formed craters, in which an abundant algae culture is established, providing raw material for the oil shale(alginate) formation. The plant thickness is about the average of 50m. Oil shale is also found in Várpalota, which is in the cover of Miocene lignite. It was created in lagoon conditions, it is a low-grade oil shale mixed with diatomite. The average thickness is 45 meters. In the cover of the Miocene brown coal plant there is a very good quality 50-80 cm thick oil shale plant is located near Szarvaskő(West-Bükk).