. Special reports on the mineral resources of Great Britain. showing Ironstone localities in the Pre-Carboniferousroclis of North m MERIONETH. ^ v^ bQ^ Drws-y-nant y O Ironstone localities Scale of Miles O 5 13I ? ? I QLGELLEYCross foxes 1. Ucheldref-ucliaf. 2. Fferam-uchaf. 3. Llanbabo, lane of. 4. Penbol. 5. Gwredog. 6. Pwll-coch-isaf. 7. Llaiidj frjdog Mill. 8. Gare);-fawr. 9. Ystrad. 10. Tyddyn-bach. Of the Trwyn-y-tal ore Haughtons is the only publishedaccount that we have found, except that Ramsay states the oreto have been worked about 1867. Haughton described it as abed
. Special reports on the mineral resources of Great Britain. showing Ironstone localities in the Pre-Carboniferousroclis of North m MERIONETH. ^ v^ bQ^ Drws-y-nant y O Ironstone localities Scale of Miles O 5 13I ? ? I QLGELLEYCross foxes 1. Ucheldref-ucliaf. 2. Fferam-uchaf. 3. Llanbabo, lane of. 4. Penbol. 5. Gwredog. 6. Pwll-coch-isaf. 7. Llaiidj frjdog Mill. 8. Gare);-fawr. 9. Ystrad. 10. Tyddyn-bach. Of the Trwyn-y-tal ore Haughtons is the only publishedaccount that we have found, except that Ramsay states the oreto have been worked about 1867. Haughton described it as abed of pisolitic magnetic ore, coarser grained than that of Gareg- PRE-CARBONIFEROUS ORES. fawr, redder in colour, more variable in composition, and highlyphosphoric. The bed in which the ore occurs is 18 ft. thick, isconformable to the associated black slates, strikes E. 35° N., anddips 80^ ^S. The average composition of this ore is given incolunm I of the table below. Xear the walls of the bed of pisolitic ore described above, someblack slaty ore (analysis II, below) occurs, containing 40-34 percent, of mixed peroxide and protoxspecialreportson13geol
Size: 1355px × 1844px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectminesandmineralresou
