The reason taken for this new plan was to save the coal seam.
The coal seam itself is 6 to 8 feet thick.
Thus, where oil and gas deposits are found, there will often be coal seams above them.
The coal seam was thick, nearly two and a half meters.
The coal seams dipped at 1 to 4.5 towards the south.
There are also numerous coal seams within the sequence, most of which have been worked.
He proposes that the coal seams should be worked in the advance.
Coal seams visible on the surface are followed deep underground.
It gave us some of the thickest coal seams in America.
These were and are economically important coal seams in the Appalachian area.
Basing their conclusions on the age of the coal bed.
Sailors and Fishers remained in conversation around the dying coal bed.
The technical feasibility, however, depends on the permeability of the coal bed.
Tim became certain that they'd used a different Destiny plant to flavor each coal bed.
There is an oil spring bubbling up through the coal beds.
Fractures, or cleats, within coal beds are usually filled with water.
Removing water from the coal bed reduces pressure and releases methane.
When coal beds are exposed, the fire risk is increased.
The clay above these coal beds has turned bright pink and red.
The cumulative thickness of the coal beds range from 0.2 to 36 meters.
Słownik geologiczny