Coal Macerals MA14 Petrographic Atlas | SIU

Southern Illinois University



Crelling's Petrographic Atlas of Coals and Carbons

College of Science


Frame ID: MA14
Sample ID: Hartshorne seam, high volatile C bituminous coal, Arkoma Basin, Oklahoma
Maceral Group: Liptinite
Maceral Type: Resinite
Magnification: As given
Illuminator: Vertical
Objective: 50x oil
Polarizer: Out
Analyzer: Out
Retarder Plate: Out
Filter: None
Important Features: A large ovoid of resinite fluorescing a bright yellow under blue-light illumination
High Resolution Image (300 dpi)

Description: Same field of view as MA13 under blue-light illumination showing a resinite ovoid fluorescing a bright yellow. The presence of a dark rim around on the outer surface of the maceral is a common feature and usually interpreted as a reaction rim caused by weathering.