A monograph of the fossil insects of the British coal measures.
The coal measures of South Wales are estimated at 12,000 feet in thickness.
The coniferous trees of the coal measures show annual rings of growth.
And more, it is a provable fact that only a portion of the coal measures is left.
Plants were created on the third day, and are found abundantly in the coal measures.
This is the soil made by the slates and sandstones of the coal measures, and is generally found on the highlands above the drift.
The beds of clays and seams of coal make up what are called the 'coal measures'.
The river here cuts through the coal measures, leaving the less valuable part of the field on the south side.
Also, he had an affection for the Dabney manorial acres, and especially for that portion of them overlying the coal measures.
The tremendous pressure that bears on the coal measures has changed a part of the carbon into liquid and gaseous form.