...Forkhill, in the county of Armagh, and the granite of Slieve Corragh, in the county of Down. The porphyry of Forkhill would be pronounced by any geologist to...of crystallization of its constituent minerals. The following analysis shows the composition of the Forkhill porphyry :— Forkhill Porphyry. Percentage....

...the county of Down. The porphyry of Forkhill would be pronounced by any geologist to be a mctamorphic slate, and not a fused rock, and yet it fulfils Fuchs'...of crystallization of its constituent minerals. The following analysis shows the composition of the Forkhill porphyry :— Forkhill Porphyry. Per-centage....

...Forkhill, in the county of Armagh, and the granite of Slieve Corragh, in the county of Down. The porphyry of Forkhill would be pronounced by any geologist to...metamorphic slate, and not a fused rock ; and yet it fulfils Fuch's condition of igneous fusion, by the apparent order of crystallization of its constituent minerals....

...trachytes, basalts, and lavas, and that they owe their relatively high specific gravity to its agency.' ' The only manner in which it seems possible to reconcile...arguments, is to admit for granite what may be called hydro-metamorphic origin, which is the converse of what is commonly called metamorphic action, but...

...trachytes, basalts, and lavas, and that they owe their relatively high specific gravity to its agency.' ' The only manner in which it seems possible to reconcile...arguments, is to admit for granite what may be called hydro-metamorphic origin, which is the converse of what is commonly called metamorphic action, but...