anthraxolite

anthraxolite

[an′thrak·sə‚līt]
(geology)
Anthracite-like asphaltic material occurring in veins in Precambrian slate of Sudbury District, Ontario.
References in periodicals archive ?
The solid bitumen of Rongxian Formation is similar to the anthraxolite of Cambrian (Ro% is 4.88%) reported by Cao et al.
The colorless, transparent crystals measure from 5 mm to 2 cm, exceptionally to 5 cm, and their interiors are profusely speckled with black flakes of something-or-other which is probably organic (in New York they call similar inclusions in Herkimer diamonds "anthraxolite"), and some yellow-brown smears of something else probably organic, as well as a few enhydro bubbles.
The quartz crystal shafts are rendered darkly smoky by inclusions of what's locally called 'anthraxolite" (probably a fossil organic residue); a later generation of quartz growth left scepter crystals of the brilliant, waterclear type.