Where was that great land, off which great rivers ran to deposit our coal-measures in their deltas?
Here we have the coal-sandstone and the slate clay, with slate, &c., alternating with the coal-measures.
In our coal-measures, the mighty dead forests of long ago, are vast stores of sunlight which we are prodigally using up.
The position of the beds which constitute the coal-measures is infinitely diverse.
It occurs in beds in primitive and transition clay-slate; also in secondary formations, as in the coal-measures of most countries.
Calamite, kal′a-mīt, n. a fossil plant abundant in the coal-measures, believed to be a kind of gigantic horse-tails (Equisetace).
The frequent presence of carbonate of iron in the coal-measures is a most fortunate circumstance for mining industry.
Slab of sandstone from the coal-measures of Pennsylvania, with footprints of air-breathing reptile and casts of cracks.
Above the coal-measures in the northern part of the county there is a moorland tract devoted chiefly to pasturage.
coal-measures underlie an area somewhat larger than the basin of the river.