These belong mainly to the Coal-measures and comprise a number of valuable coal-seams which have been extensively worked.
"Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 4" by Various
The variation in the composition of coal seams in different parts of the same basin is a difficult matter to explain.
"Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 5" by Various
That's how it is you never find anything but shale or slate (which is mud-rock) or sandstone above a coal seam.
"The Boy With the U.S. Miners" by Francis Rolt-Wheeler
Fifteen seams of coal, one above another, is the greatest number that have been found.
"Earth and Sky Every Child Should Know" by Julia Ellen Rogers
In some instances the seams of coal with their thin "partings" of clay reach an aggregate thickness of twenty to thirty feet.
"Coal" by Raphael Meldola
They contain numerous seams of coal.
"Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 3" by Various
The coal seams are commonly associated with petroleum springs.
"Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7" by Various
Nova Scotia, coal seams of Cape Breton, 315. fossil forest of coal in, 321.
"A Manual of Elementary Geology" by Charles Lyell
A coal seam is not wealth; but a coalmine is wealth.
"Britain for the British" by Robert Blatchford
Fireclays of great value are obtained from beneath many of the coal seams.
"Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 8" by Various
Exxon Invests in Australia Coal-Seam -Gas Venture.
Urban and his family bought their NSW home in 2008, and it's just one of more than 460 properties that fall within the area of the proposed coal-seam gas and coal mining undertakings.
Queensland 's state government has begun its controversial program of cash bidding for coal seam gas blocks with the first two permits up for bids.
The coal seams will supply gas to QGC's Queensland Curtis LNG project, at Gladstone.
A team of regional partners has begun to inject carbon dioxide into Virginia coal seams to determine whether it can be stored there and potentially produce coalbed methane, the US Department of Energy said on Feb 11.
Mountaintop removal is a type of coal mining, common in West Virginia, that requires exactly what its name suggests, the removal of a mountaintop to get at the coal seam lying beneath.
Perth company Liquefied Natural Gas Ltd (LNGL) received approval from Queensland authorities for its proposal to use a membrane storage tank for LNG produced from its coal seam gas-LNG project in Gladstone, Queensland.
A haul truck is pictured at a coal seam at a coal mine in the Powder River Basin in Wyoming in this undated handout photo obtained by Reuter.
Australia's biggest coal seam gas field, prompting calls for halting expansion of hydraulic fracturing until scientists can determine whether it might be contributing to climate change.
Mountaintop removal is the use of explosives to take off the top of a mountain or ridge to expose underlying coal seams.