MAPS AND SECTIONS. 363 



Ireland. 5 Sheets of the Qeological Survey Map. Scale an inch to 

 a mile. 



Sheet 35. By E. T. Hardman. Parts of Tyrone, Derry, Armagh, 

 and Antrim (Dungannon, Coalisland, Stewartstown), including the 

 country on the S.W. quarter of Lough Neagh. Formations : — Fresh- 

 water shingle; Alluvium; Peat; Drift; Pliocene Clays (ancient Delta of 

 Lough Neagh) ; Miocene Basalts in sheets and dykes ; Chalk ; Keuper 

 Marl; II. Bunter Sandstone; Permian (Zechstein) ; Coal Measures, with 

 coal-crops (Coal-fields of Annaghone and Dungnnuon) ; Millstone Grit; 

 Yoredale Beds ; Carboniferous Limestone, 3 divisions. 



Sheet 59. By F. W. Egan. Parts of the Counties Armagh and 

 Monaghan, with small portions of Down and Louth (Castle Claney, 

 Kowtown Hamilton, Keady Carnlough). Includes the hill country 

 around Slieve Gullion. Formations : — Peat ; Alluvium ; Drift ; L. 

 Silurian, with metamorphosed beds ; Basalt (Tertiary) ; Older Basalt and 

 Dolerite; Diorite; Pelst one-porphyry ; Mica- trap ; Volcanic Agglome- 

 rate, Palaeozoic ; Elvanite ; Granite ; Syenitic granite. Some extensive 

 dykes, Lodes of Copper and Lead, Glacial Markings, (fcc. are shown. 

 The Igneous rocks in the neighbourhood of Slieve Gullion are extremely 

 varied ; and these also enter into Sheet 70, which forms the southern 

 continuation of the district. (See below.) 



Sheet iSQ. By F. J. Foot and R. J. Cruise. Includes part of Sligo 

 and Eoscommon, with small portions of Leitrim and Mayo (Balymote 

 and Boyle). Formations : — Alluvium ; Peat ; Drift ; L. Coal Measures ; 

 Millstone Grit, with coal-seams (part of Connaught coal-district); 

 Yoredale Beds ; Carboniferous Limestone, 4 divisions ; Old Red Sand- 

 stone ; Melaphyre ; Diorite ; Pelstone ; Pelspathic ash; all more recent 

 than the Old lied Sandstone. Coal-crops, ironstone-deposits, and 

 glacial markings are shown. 



Sheet 70. By J. Nolan. Parts of Armagh, Monaghan, and Louth 

 (Dundalk, Carrickmacross, Crossmaglen, Louth), includes the country 

 west of Dundalk Bay, with the hill country south of Slieve Gullion, com- 

 posed of a variety of igneous rocks. Formations : — Bog ; Alluvium ; 

 Raised Beach ; Drift ; Keuper Marls ; Bunter Sandstone ; Coal 

 Measures; Carboniferous Limestone, 3 divisions; L. Silurian, partly 

 metamorphosed ; Basalt and Dolerite, Palaeozoic ; Diorite ; Mica-trap ; 

 Felstone and Pelstone-porpyhry ; Volcanic Agglomerate (Palaeozoic) ; 

 Elvanite ; Granite. A few lodes of Copper and Lead, glacial markings, 

 and many faults and dykes are shown. 



Sheet 112. By W. L. Willson, G. V. Du Noyer, and A. Wylie. 

 Revised by R. J. Cruise. Part of the County Dublin (Dublin, Kingstown, 

 Howth and Ireland's Eye, Killiney, Chapelizod). Includes the country 

 about Dublin Bay and west of it, with part of the Dublin mountains 

 (Granite) to the south. Formations : — iilluvium ; Raised Beach ; Drift; 

 Carboniferous Limestone, 3 divisions ; L. Silurian ; Altered Silurian ; 

 Cambrian, occupying the greater part of the peninsula of Howth. 

 Igneous Rochs'. — Eelstone-porphyry ; Basalt (Palaeozoic); and Granite, 

 forming the Dublin range. Glacial markings are shown. E. T. H. 



