Coal Macerals MA34 | Petrographic Atlas | SIU

Southern Illinois University



Crelling's Petrographic Atlas of Coals and Carbons

College of Science


Frame ID: MA34
Sample ID: Pittsburgh Seam, high volatile A bituminous coal, Pennsylvania
Maceral Group: Inertinite
Maceral Type: Fusinite and Semifusinite
Magnification: As given
Illuminator: Vertical
Objective: 50x oil
Polarizer: In
Analyzer: Out
Retarder Plate: Out
Filter: None
Important Features: Fusinite and the lower reflectance semifusinite occurring together
High Resolution Image (300 dpi)

Description: The brightest material in this frame is fusinite and the lower reflectance material is semifusinite. Note that both macerals have the characteristic open cell texture.