Coal Macerals MA18 | Petrographic Atlas | SIU

Southern Illinois University



Crelling's Petrographic Atlas of Coals and Carbons

College of Science


Frame ID: MA18
Sample ID: Hiawatha Seam, high volatile C bituminous coal, Wasatch Plateau, Utah
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: Resinite showing zonation.
High Resolution Image (300 dpi)

Description: Under blue-light illumination, an ovoid of resinite fluoresces bright yellow with a darker center. This is a zoning texture possibly caused by phase separation or by multiple periods of resinite intrusion.