INDEX TO GEOLOGY. 



Andesite lava, 27. 

 Annelids, 226. 



Ballagan Beds, or Lower Tuedian, 



240. 

 Basaltic trap rock (Diorifce), 23. 

 Bothriolepis obe.sa, 228. 

 Boalder-clay, 265. 



Carboniferons Age, the, 42, 51. 



Carboniferous Rocks, 256. 



Cement Stones, or Ballagan Beds, 



240. 

 Cheviots, the, formed by volcanic 



and associated rocks, 233 — of 



Devonian age, 236. 

 Coals, Scremerston, 41. 

 Coast from St. Abbs to Siccar 



Point, 233. 

 Cornstones, 240. 

 Cove, 241. 



Cretaceous Rocks, 2SQ. 

 Crumpling of strata, 232, 233. 



Devonian period, estimated at 100 



years, 236. 

 Diorite, 23. 

 Diplograptus sinuatus, 221 . 



Felspar, 53. 



Flaggy sandstone, 98. 



Gala Rocks, 226, 228, 229, 234. 

 Crraptolites (i.e. annelids), 226, 229, 



Greenhengh Point, 239. 

 Greywackr, 224, 226, 230, 256. 



Haematite, 238. 



Haggis Rock of Peebles and Lanark- 

 shire, 255. 

 HoLoptychius nohilissimus, 228. 



Jasper, 254. 

 Jurassic Rocks, 54. 



Lanarkian Rocks, 231 



tonian), 233. 

 Limbnrgite, 27, 53. 



(Down- 



Mfinograpfus attenuatus, 226. 



harrandei, 227. 



conrolutu.s, 227. 



crispiis, 226, 227. 



exiguus, 226, 227. 



galaennis, 227. 



hisingeri, 226. 



leptoiheca, 227. 



pandus, 227. 



priodon, 227. 



sedgiuii-kii, 227. 



turricnlatus, 226, 227. 



vomer inus, 226. 



Nepheline, 53. 



New Red Sandstone, traces of, in 

 East Lothian, 54 — former extent 

 in south of Scotland, 256. 



Nodules of sandstone, 224. 



