31(S ProcGcdings of the Royal Physical Society. 



To Mr C. W. Peach, however, geologists are indebted for 

 most of the knowledge we possess regarding the organic 

 remains of that deposit. His residence at Wick for many- 

 years afforded him frequent opportunities of making collec- 

 tions of these remains. The results of his observations have 

 been communicated mainly to this Society, and have been 

 published in the Transactions, while some reports were also 

 presented to the Geological Section of the British Associa- 

 tion.* He was the first to publish lists of the organic 

 remains, and was likewise the first to recognise the resem- 

 blance between the ice-worn blocks of the secondary rocks in 

 the boulder clay and the representatives of these rocks on the 

 Sutherlandshire coast. In 1868 he informed Dr Croll that 

 his researches had led him to the conclusion that the boulder 

 clay was a genuine product of land ice, and in every respect 

 identical with Scotch till.f He also stated that he had come 

 to believe that the ice movement had been from the Moray 

 Firth towards the Atlantic, and that in all likelihood it might 

 have been produced by masses of land ice crossing the Moray 

 Firth from the high grounds to the south-east. 



In 1866 Mr T. Jamieson, in a paper on " the Glacial 

 Phenomena of Caithness," J gave an excellent account of the 

 shelly boulder clay, referring specially to its distribution, its 

 physical characters, and organic remains. He advocated the 

 theory that this deposit was due to floating ice during what 

 he terms the glacial marine period, and he suggested that the 

 transport had been from the north-west to the south-east, 

 across the country between Pteay and Dunbeath. The main 

 argument adduced by him in support of this movement from 

 the north-west, is the overlapping of the dark grey shelly 



* See tlie following papers by Mr. C. W. Peach in the Trans, of the Roy. 

 Phys. Soc., Edin., "On the Discovery of Calcareous Zoophytes in the 

 Boulder Clay of Caithness," vol. i., p. 18; " On the Discovery of Nullipores 

 and Sponges in the Boulder Clay of Caithness," vol. ii,, p. 98; "On the 

 Fossils of the Boulder Clay of Caithness," vol. iii., p. 38 ; " Further Observa- 

 tions on the Boulder Clay of Caithness, with an Additional List of Fossils," 

 vol. iii., p. 396 ; also Brit. Ass. Rep. for 1862, Trans, of Geol. Sec, p. 83 ; 

 Ibid, for 1864, p. 61. 



t Geol. Mag., 1870, p. 212. 



:;: Quart. Jour. Geol. Soc, vol. xxii., p. 261. 



