HARD COAL
Anthracite coal Go on to: #1 | #2 | #3 | #4
Detail of this specimen
>>> Return to previous
Return to:
Alphabetical Listing
Basic Key
QFL Clastic Key
|
Composition
Partially decayed organic matter
|
Description
Black, shiny, homogeneous, breaking with a conchoidal fracture.
|
Tectonic Association
None specific
|
Formation & Environments
Anthracite coal forms when bituminous coal undergoes very low grade metamorphism, accompanied by structural deformation. The fixed carbon content under these conditions reaches 85-95%.
If anthracite is metamorphosed further it turns into graphite.
|