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Updated: May 10, 2025
In an English house you would hardly feel it, but with only one plank an inch thick, a lining-board and canvas and paper, between you and a hard frost, a good fire is wanted. We burn coal found twelve miles from this; it is not very good, being only what is called "lignite." I don't know if that conveys to you a distinct impression of what it really is.
Somebody had sold him forty thousand acres of land in a body for three dollars an acre. It began at the river and ran back to the hills for a matter of twenty miles. Philbrook bought the land on the showing that it was rich in coal deposits. Which was true enough. But he was not geologist enough to know that it was only lignite, and not a coal of commercial value in those times.
Thus in the lowest layers of the coal ground appears the anthracite, which, being almost destitute of volatile matter, contains the greatest quantity of carbon. In the higher beds are found, on the contrary, lignite and fossil wood, substances in which the quantity of carbon is infinitely less.
So, when we arrive at the lignite stage, we find that a considerable quantity of volatile matter has already been parted with, and that the carbon, which in ordinary living wood is about 50 per cent. of the whole, has already increased to about 67 per cent.
A valley or river channel was cut through them, probably during the gradual upheaval of the country, and the hollow became afterwards the receptacle of the comparatively modern freshwater beds A, B, C, and D. They may well represent a silted up river-channel, which remained for a time in the state of a lake or mere, and in which the black peaty mass B accumulated by a very slow growth over the gravel of the river-bed A. In B we find remains of some of the same plants which were enumerated as common in the ancient lignite in 3 prime, such as the yellow water-lily and hornwort, together with some freshwater shells which occur in the same fluvio-marine series 3 prime.
Beside the Bovey Tracey lignitic beds to which we have above referred, other tertiary clays are found to contain this early promise of coal. The eocene beds of Brighton are an important instance of a tertiary lignite, the seam of surturbrand, as it is locally called, being a somewhat extensive deposit.
C.2: Woolwich and Reading series: Argile plastique and lignite. C.3: Thanet sands: Sables de Bracheux. That gypsum has been selected by almost all Continental geologists as affording the best line of demarkation between the Middle and Lower Tertiary, or, in other words, between the Lower Miocene and Eocene formations.
Coal mines found in the Samana peninsula produced a kind of lignite which proved of little commercial value and gave rise to the belief that the Republic's coal deposits had not emerged from the formative period. Later investigations show that while there is considerable undeveloped lignite, coal suitable for fuel is not wanting.
Signor Gastaldi has shown that all the ponds in that area consist exclusively of what M. de Mortillet has denominated morainic lakes, i.e. caused by barriers of glacier-mud and stones. Fifthly. The deposits alluded to on the borders of the Lake of Zurich are those of Utznach and Durnten, situated each about 350 feet above the present level of the lake and containing valuable beds of lignite.
The coal, Mr. Becker says, is analogous to the Japanese coal and that of Washington, but not to that of the Welsh or Pennsylvania coals. It might better be characterized as a highly carbonized lignite, likely to contain much sulphur as iron pyrites, rendering them apt to spontaneous combustion and injurious to boiler plates.
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