File:The encyclopædia of geography- comprising a complete description of the earth, physical, statistical, civil, and political (1841) (14582771837).jpg

Identifier: encyclopaediaofg01murr (find matches)
Title: The encyclopædia of geography: comprising a complete description of the earth, physical, statistical, civil, and political
Year: 1841 (1840s)
Authors: Murray, Hugh, 1779-1846 Wallace, William, 1768-1843 Bradford, T. G. (Thomas Gamaliel), 1802-1887
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Publisher: Philadelphia : Lea and Blanchard
Contributing Library: University of California Libraries
Digitizing Sponsor: Internet Archive

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found under thelocal section. Sect. II.—Natural Geography. The Botany and Zoology of Ireland, having been treated under the head of England, thissection ivill be confined to Geology. SuBSECT. 1.— Geology of Ireland. The geology of this part of the empire is not so well known as that of Great Britain.The following sketch will enable our readers to form a general conception of the geognos-ticnl structure of those parts of the island which liave been already surveyed; viz.—1. Northof Ireland ; 2. Connaught coal district; 3. East of Ireland ; 4. South, and part of the westof Ireland. (1.) North of Ireland. This district, limited by Dundalk Bay on the south-east, and by LoughFoyle on the nortii-west, is marked by three distinct systems or groups of mountains, one ofwhich occupies the more southern counties, while the more northern are divided betweenthe two others. 1st system. Tlie Mourne mountains.—The Mourne mountains form a well-definedVol, I. 37 3 E 4dl MAP OF IRELAND. Fig. 211
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10 M 30 40 M «» ■ 1 I I I EoglutrMilei ^- 9 Longitude Weal 8 from GreeawicU 7 Book I. IRELAND. 4db group, extending from Dundrum Bay to Carlingford Bay, in the southern extremity of Down.Slieve Donard is the highest summit of this group, and rises about 2654 feet above the levelof the sea. The north-west of the main group, the Fathom Hill, Slieve Girken, or theNewry mountains, and Slieve Gullen, are situated in the south-east of Armagh; and theRavensdale and Carlingford mountains, in the north of Louth, may be considered as its ap-pendages. Granite, which is the prevailing rock of these mountains, contains beautifulrock crystals, also felspar and mica crystals, topaz and beryl. To the north of the Mournemountains Slieve Croob, composed of syenite, and Slieve Anisky, of hornblende rock, forman elevated tract, dependent upon, but placed at some distance from, the main group. Horn-blende rock, greenstone, and porphyry are said to be abundant on the skirts of this granite dis-trict. T

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