Papurau Newydd Cymru

Chwiliwch 15 miliwn o erthyglau papurau newydd Cymru

Cuddio Rhestr Erthyglau

18 erthygl ar y dudalen hon

.( THE MINERAL WEALTH OF SOUTH…

Newyddion
Dyfynnu
Rhannu

THE MINERAL WEALTH OF SOUTH WALES. (From the Mining Journal•) The old mail road from Carmarthen to Swansea passes through the picturesque village of Llanddarog. Before reaching this village it traverses a fine level plateau of the lower Silurian formation, from which a magnificent geological prospect stretches on every hand. On the north-east the Vale of Towy opens these old rocks, which undulate in great curves, and whose sides have been smoothed by the denuding floods of countless years. From Llandovery, in the I east, those lofty mountains extend to Preseelby, on the west, and on the south we have the carboniferous limestone and the coal measures, with an intermediate belt of red sandstone, which presents no remarkable features, and is almost destitute of fossils. The mountain limestone of this district is extensively worked for agricultural purposes and in burning it the anthracite, which lies on its southern flank, is exclusively used. The grealer ]\;i" <f Carmarthen- shire and Cardiganshire is supplied with lime from these quarries. There is no railway to them, and farmers know something of the cost and inconvenience of carting lime over a hilly country, in many cases more than thirty miles. During the summer months the traffic is enormous. Lime is sold at the kilns at from 5s. to 6s. per ton. It is evident that a railway would be of great use to these counties, and, if economically made, the shareholders would not have to complain of profitless outlay. Several lines have from time to time been projected, but nothing has actually been done. Perhaps the cheapest and best way at present of making a line would be through the lesser Gwen- draeth Valley to the South Wales Railway, thus obtaining communication direct, to the west, with Carmarthen, from which there is a line in course of construction through Cardiganshire, and to the east, with the important county of Glamorgan. The millstone grit of this district is not much de- veloped) nor does it present any very remarkable features. In a few isolated places it is disintegrated into a fine white sand, used in potteries and for fire- brick but, for the want of railway communication, it is not extensively worked. The junction of the mill- stone grit is distinctly perceptible from the elevated ridge of the mountain limestone into the Gwendraeth Fawr Valley, where the first outcrops of the lower an- tbracite appear. In this valley there are several col lieries at work. One of the largest is at Pontyberim, where both ironstone and anthracite are obtained. Mr. Watney, the proprietor, has furnaces here for the manufacture of anthracite iron, which is of a superior quality. This valley is traversed by a canal from Mynydd Maur to Kidwelly and Pembrey, or Bury Port. It is supplied with water from a reservoir at the Great Moantain, which is as large as many natural lakes. Kidwelly is an ancient borough, formerly of considerable importance, but now noted only for its venerable castle, its narrow, old-fashioned streets, and its local government. The whole place, and even its inhabitants, remind one of days long gone by. At one time large ships frequented the harbour, which is now almost silted up. Pembrey is a rapidly improv- ing port, contiguous to several openings of coal, and the seat of the extensive copper-works of Messrs. Masou and Elkington, of Birmingham, who selected the towon on account of the wouderful facilities it affords for smelting copper, which is so much used in the manufacture of their plated goods. Many proposals have recently been made for the opening up of the Gwendraeth Valley; the most feasible is to convert the canal into a railroad, running from the Great Mountain direct to Pembrey. This line would not be an expensive one, and when it is considered that it would open one of the richest mineral districts of the kingdom, affording the requisite facility for the ex- port of iron, anthracite, and lime, and at the same time connect the district with the marts of commerce, it is surprising how little has been done. In England the country has been literally cut up into a close net- work of railways, but Wales must wait until the vaunted patriotism of Welshmen developes itself in more substantial and profitable ways than at Estedd- fodau, and in speculations long distances from home. A little further to the east is Cross Hands, which rises to a considerable elevation above the level of the sea. Here there is an embankment of a tramway, which thirty years since bore the name of the Carmar- thenshire railroad. It commences at Cwm Mwyn, near Cross Hands, where there are valuable and very rich beds of clay ironstone in the lower anthracite coal measures, which are worked for the purpose of smelt- ing at Llanelly, where, Mr. Raby, the proprietor, had erected a furnace. The cost of this tramway must have been considerable, and speaks much for the en- terprise of Mr. Raby, especially as it was made at a period when such works were not so economically constructed as at the present day. But in this case the whole truth must be told. The speculation was unnatural and ill-advised, and the result such as always attends want of care and good management. We have walked over a great portion of this tramway, of which the earthwork alone remains, the metals and sleepers having been removed. The embankment is, however, in excellent condition, and might be converted into a railroad at a compara- tively small outlay. If this were done, it would open the whole of the Great Mountain minerals, which have been less worked than any district in Wales. It would also connect the whole of the Gwendraeth Valley with Pembrey and Llanelly, at a distance of ten or twelve miles. At present the only line from this nearly virgin district is the Mountain branch of the Llanelly and Llandilo Railway, which is not only a circditous route, but it is also hampered with some very steep inclines. This place has been woefully neglected by capitalists and resident men of property. It abounds in iron, coal, and lime, which have only been worked in a limited degree, and most slovenly. Generally the outcrop only has been touched, and in some instances the mineral has been reached by small and badly-constructed adits. The demand for anthracite is rapidly increasing. Its superior qualities for malting, hop drying, sugar refining, cooking stoves, and, above all, for long- voyage steamers, are now undergoing a severe trial, and so far the experiments which have been made give it the first place. Its value for manufactories in town must be obvious, as it is entirely smokeless, and does not require expensive smoke-consuming furnaces. A few years ago, the whole of the anthracite worked here was either carted away as house coal for the immediate locality, or for shipment to various ports in England and Ireland. Even now this barbarous system is continued to a great extent for want of railways. It is in Mynydd Maur that the upper beds of anthracite, including the 9-ft. vein, is best deve- loped. Having noticed these seams in a previous article, we pass on to the Cwmamman Valley, in which are the lower members of the anthracite beds here the upper bed is absent, and the valley presents an appearance of extensive denudation. The upland beds in the mountain have not suffered so much from this cause, but to the west, in the Gwendraeth Valley, the upper beds are gone, the lower beds re- maining in situ. Although the large veins are near the surface on the Great Mountain, over which they undulate like huge waves, to the west of Cross Hands there is some high land, containing several small veins, geologically more recent, or whose posi- tion is above the 9ft. and 6ft. veins, but so far as they have been tried they do not prove of much commer- cial value, being for the most part culm. The pretty village of Llandibie is situate in this valley, and the railway which runs through it is the principal line of transit for the minerals on the eastern flank of the Great Mountain. Still further to the east is the Cwmamman branch of this railway, which traverses an important anthracite district. The coal has been worked here with much spirit for several years, by varidus companies. Nearly south of this line we observed in most of the openings that crop on the northern flank of the Bettws Mountain a general correspondence with the upper beds of the Great Mountain, whilst the veins which crop to the north or southern flank of the Black Movntain correspond to the lower anthracitic beds, that crop in the Gwen- draith Valley. The geological features of these beds are deeply interesting. We find the great vein, called by the Welsh miners Vawr," after running the south side of the Gwendraith in one continuous bed of high quality, begins, in the parish of Llandibie, on the northern Bank of the Great Mountain, to divide into three distinct seams by the interposition of two small dirt-beds. These dirt-beds appear first no thicker than a sheet of paper, and, extending eastward, grow until at the upper part of the Cwmamman Valley the 9-ft. vein is separated into three distinct veins, with several fathoms of hard rock between each. These changes are conclusive evidence that the coal beds here are the deposit of drifting vege- table matter, which at first lay in a horizontal posi- tion, and was subsequently covered by dirt-beds of a wedge-like form. A careful examination of the vein from east to west is necessary to the fuli appreciation of its theoretic importance. We know that another theory is enter- tained by eminent geologists, but we feel certain that 11 el whatever evidence other coal fields furnish in support of the opinion that the plants of the coal formation grew on the spot, a close and impartial inspection of this district will lead to a very different conclusion. We are prepared to give ample proof in support of this view, but this is hardly the place to do so. We may, however, add, that not only do the rocks on the coal and the fire-clay beneath it show by the plants impacted in them that the vegetation was drifted to the spoi,, but the quality of the coal itself, being more pure and free from earthy matter where there is not an interposed dirt-bed, clearly indicate the growth of the coal plants was not in situ. Then, there is the evidence of changes now in progress in various coun- tries strongly corroborative of our position. Suppose a large river flowing through a vast wooded country, bringing down year after year immense quantities of drifted vegetable matter, as is now the case in the great American rivers-the Mississipi, Amazon, and others, it would be deposited in some particular part of the sea, or in a gulf like that of Mexico, as directed by the currents. When these currents, or the force of the river streams, changed, there would neces- sarily be an interruption in the deposit of timber in that particular locality. The change would probably be favourable for the deposit of earthy matter, which would be brought down by the supposed river, as in our own day we find that in some seasons wood drifts in rivers, and at other seasons it ia replaced by mate- rials in every respect adapted to the formation of rocks similar to the coal measures. We cannot enter further into the interesting sub- ject in this place. We shall in our next notice the methods of working the anthracite of this district, the manner in which it is burnt for domestic purposes, and its value for manufacturing and steam purposes.

-! IDR. LIVINGSTONE'S EXPEDITION.

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EDUCATION AND DESTITUTION.

THE LATE STRIKE IN THE BUILDING…

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--iI---COLEFORD, MONMOUTH,…

SOU T H W ALE S h...:1...l.L…

NEWPORT, ABERGAVENNY, ANDHEREFORD…

SHREWSBURY AND HEREFORD, MANCHESTER,…

GREAT WESTERN RAILWAY.

BRISTOL AND EXETER RAILWAY.

SOUTH DEVON RAILWAY.

WESTERN VALLEYS RAILWAY.

,EASTERN VALLEYS RAILWAY.

TAFF VALE RAILWAY.

RHYMNEY RAILWAY.

VALE OF NEATH RAILWAY.