SHEPPARD : SHAP GRANITE, ETC., IN LINCOLNSHIRE. 335 



Whilst in the quarries at Wasdale Crag in Westmorland last 

 Easter (it is from this place that all the boulders of Shap Granite 

 have originally travelled) I obtained a quantity of hand specimens 

 of the rock, and shall be very pleased indeed to send a piece to 

 anyone in Lincolnshire interested in the subject, who is unacquainted 

 with the rock, in the hopes that a constant look-out may be made 

 for 'Shaps.' I feel confident that many other boulders of this 

 granite will be found in Lincolnshire — they only require looking 

 for. The rock cannot very well be mistaken, it is a ' pepper- 

 and-salt '-looking granite, of a pinkish colour, containing large 

 rectangular crystals of flesh-coloured felspar, which vary from an 

 inch to an inch and a half in length, and are about half as wide. 

 The matrix consists of minute crystals of colourless quartz, pink 

 felspars and black mica, together with other minerals. There is 

 also a whitish variety of the same rock, the ground-mass in this case 

 containing several small specks of w T hite felspar, which give it 

 a generally whiter aspect. This granite has recently formed the 

 subject of an exhaustive paper by Messrs. Harker and Marr. : " 



I should here like to say a few words respecting the Lincolnshire 

 Boulder Committee. It was with very great pleasure that I read in 

 Part I. of the Transactions of the Lincolnshire Naturalists' LTnion, 

 the Presidential address of Mr. J. Cordeaux, M.B.O.U., in which he 

 proposed (p. 7) that a Boulder Committee should be formed whose 

 object would be 'to take observations relative to the erratic or 

 ice-borne blocks of Lincolnshire, their character, position, size, 

 origin and height above the sea. This to be carried out on the 

 same lines generally as those adopted by the Boulder Committee of 

 the British Association.' It is also gratifying to learn that this 

 suggestion has been carried out, the Committee consisting of the 

 following gentlemen: — The Rev. W. Tuckwell (Secretary), and 

 Messrs. F. M. Burton, J. H. Cooke, H. Preston, A. W. Rowe, 

 E. A. Woodruffe-Peacock and P, F. Kendall. Though only in 

 existence a very short period, a large amount of good work has 

 already been done. Mr, Tuckwell has put on record particulars of 

 a quantity of boulders (including some Norwegian) obtained from 

 a depth of over ten feet at Grimsby,t and during the past summer 

 the Hull Geological Society and the writer have sent particulars of 

 a large number of erratics which have been observed at different 

 places in the county, to the Committee. In May last the Hull 

 Society made an excursion in the Louth neighbourhood, when 

 Mr. Tuckwell, Mr. Kendall (the Secretary of Brit. Assn. Erratic 



* Quart. Joura. Geo*. Soc., 1891, p. 266-328. 



t 23rd Report Brit. Assn. Erratic Blocks Committee, 1895. 



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Nov. 1896. 



