Papurau Newydd Cymru

Chwiliwch 15 miliwn o erthyglau papurau newydd Cymru

Cuddio Rhestr Erthyglau

14 erthygl ar y dudalen hon

Advertising

THE MARRIAGE TIE.

ENTITLED TO TENBY'S CONFIDENCE.

ANCIENT COAL WORKINGS

Newyddion
Dyfynnu
Rhannu

ANCIENT COAL WORKINGS AI." GEOLOGICAL SURVEY IN PEMBROKE- SHIRE. By the completion of the six-inch survey of Pembrokeshire the whole of the South Wales coalfield has now been covered. Mr H. H. Thomas, in completing the mapping of the car- boniferous tract between Newgale and Nolton Haven, finds that the lowest coal measures occur on the northern side of Newgale Marsh and are followed by a shale-series with the most impor- tant coals. These have been worked along the southern side of the marsh and in the West Hills, and probably at Simpson also. The highest measures strike parallel to the coast to the north of Nolton and contain several good veins which have been worked on the cliff, and at the Folly and Trevrane. They are associated with strong sandstones, and thus form a series differing from the sliale-series below. At Nolton also Mr T. C. Cantrill finds the lower or slialy group with several coal-veins, most of which have been worked in past times, to be succeeded by the same upper or pennant-like sandstone group, in which coals, though present, are less numerous. This group presents a general lithological resem- blance to the Llynfi Rock and Pennant of other parts of the coalfield, a resemblance noted in 1846 by De la Beche. A somewhat complex structure of the coal measures between Newgale and Nolton is noted by Mr Thomas. From Nolton north- wards the veins strike due north, but south of Chapel they turn abruptly eastwards towards Trevrane with a northerly strike, and after a. short course turn westward along the low ground towards Bathesland and the sea. At Nolton Mr Cantrill finds several important structural features affecting the carboniferous tract. In the first place the strong sonth-south-weaterlv dip which the Ordovician and Silurian rocks had acquired in pre-carboniferous time has made the unconformity at the base of the carboniferous rocks most conspicuous. One after another the outcrops of the older rocks in the old platform are overstepped by the millstone grit. But the plat- form having a slight declination southward, over- lap within the carboniferous series itself was set up.

[No title]

Advertising

PICTURESQUE VISITORS.

.103 YEARS OLD. -

Advertising

| TENBY TIDE TABLE. SEPT.,…

! RAILWAY TIME TABLE. JULY,…

FISHING TRADE BOOM AT MILFORD…

[No title]

LIST OF VISITORS.I