336 



SHEPPARD : SHAP GRANITE, ETC., IN LINCOLNSHIRE 



Blocks Committee), and others were also present. On this occasion 

 everybody was surprised at the large quantity of boulders and rocks 

 of foreign origin that were found on and in the Boulder Clay of the 

 district. In front of the entrance to Thorp Hall, just outside 

 Louth, on the Lincoln Road, was a boulder of Augite-syenite, 

 a characteristic Norwegian rock, measuring 2 feet by 1 foot 8 inches, 

 by 1 foot 5 inches, which still retained the scratches inflicted upon 

 it by the ice during the ' Glacial Period.' Up to the time of writing, 

 this is one of the largest boulders of Augite-syenite recorded for 

 Britain, if not the largest. Steps are being taken by Captain Tennyson, 

 the owner of Thorp Hall, to preserve this boulder. 



GEOLOGISTS AT LOUTH, MAY 1896. 



Rev. W. Tuck well. 

 Mr. W. H. Crofts. Mr. T. Sheppard. 



Mr. Clapkam. Mr. P. F. Kendall. Mr. F. F. Walton. Mr. j. W. Stather. 



Mr. D. Cross 



There is another Norwegian rock which was found in plenty in 



the Boulder Clays, viz., Rhomb-porphyry. 



This is so called on 



account of the large rhomb-shaped crystals of felspar (orthoclase), 

 which are embedded in a fine-grained matrix, which varies in colour 



from slaty green to purple or brown. These i rhombs * are especially 



striking on a water-worn surface. 



From these numerous finds it would appear that there IS 

 a splendid field open for persons havin^ a ^eolosncal inclination 



* 3? C? C7* 



who are fortunate enough to live in the 4 second largest county^ot 



. / 



