Unusual Devonian coal: A new type of jet

摘要

A new type of jet from continental Devonian sediments is described. The substrate for gagatization was fragments of Archaeopteris plants, whose burials in sandstone strata are characterized by a kind of spheroidal weathering of organic matter; the material is completely fusainized. This type of jet combines the properties of classical jet and inertinite. The new type of jet was named tsilmanite-after the place of its discovery. (C) 2015, V.S. Sobolev IGM, Siberian Branch of the RAS. Published by Elsevier B.V. All rights reserved.