Coal Macerals MA13 | Petrographic Atlas | SIU

Southern Illinois University



Crelling's Petrographic Atlas of Coals and Carbons

College of Science


Frame ID: MA13
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: In
Analyzer: Out
Retarder Plate: Out
Filter: None
Important Features: Large ovoid of resinite
High Resolution Image (300 dpi)

Description: The large ovoid of resinite is darker than normal for a resinite maceral.Note how the other macerals adjacent to the resinite are compressed around it. This feature is usually interpreted to indicate that the resinite was solidified before it was incorporated into the peat.