102 ME. E. L. SHEELOCK ON THE EELATIONSHIP OF THE [Feb. I9II, 



(5) The Evidence from Deep Borings. 



In addition to the deep borings in the Middlesbrough district, 

 mentioned for convenience in the last section, a number of borings 

 have been made in search of coal or water through the New Red 

 rocks farther south. 



In most cases, when boring through New Red rocks, it is im- 

 possible to say at what depth a particular division was met with, so 

 that the thicknesses given generally are merely approximate. No 

 boundary-line, for example, can be drawn between Pebble Beds and 

 Lower Mottled Sandstone; and often the junction of the Bunter with 

 the Keuper and the Permian would be taken at different horizons 

 by different authorities. Making allowance for this difficulty, how- 

 ever, the borings are of great interest, since they enable us to trace 

 the Permian deposits away from the Permian coast-line into what 

 was presumably deeper water. 



At Gedling Colliery 1 (situated about 3 miles north-east of Not- 

 tingham Market Place) the Bunter is 385 feet thick, and the Permian 

 consists of 46 feet of grey shales with 8 inches of basal breccia. 



At Thurgarton boring, 6 miles to the north-east of Gedling, the 

 Bunter was 494 feet and the Permian was about 93 feet thick. 

 The latter consisted of red and blue shales with sandstone bands, 

 a thin seam of gypsum, and a basal breccia. Possibly these beds 

 represent the Marl Slates, Limestone, and Middle Marl. The 

 absence of limestone at Gedling and Thurgarton is remarkable. 



At Bestwood Colliery, 5 miles north-north-west of Nottingham, 

 the shaft was commenced in Bunter, and passed through 19 feet of 

 the Middle Marls and 30 feet of Limestone into Coal Measures. 



At the Oxton coal-boring, 5 miles north-east of Nottingham, 

 below 374 feet of Bunter Sandstone, there was 9 feet of ' Permian 

 Marl/ Limestone 45 feet, Marl Slate 85 feet, and Basal Breccia 2 j feet. 



At the Crown-Farm Colliery, Mansfield, where the shaft was 

 commenced in Bunter Pebble Beds, the Lower Mottled Sandstone 

 was 112 feet thick, and was followed by 16 feet of Marl with 

 micaceous sandy bands, then Limestone 67 feet, Marl Slate 98 feet, 

 and Breccia 3 feet. 



At Southcar 2 (also known as Haxey) the New Red consisted of 



Thickness in feet inches. 



Upper Keuper (incomplete) 105 7 



Lower Keuper 608 7 



Bunter 434 4 



^ Tinner f Marls ^ With ^P SUm) 7 ° 



I ^PP, er Anhydrite 8 10 



I ar S * [ Marls and sandstones (with gypsum). 73 1 



I Upper Magnesian Limestone 53 



Permian. ■{ Middle Marls (with gypsum) 132 9 



y j" Magnesian Limestone, with a"j 

 ower \\t\\e mar i an( j „yp Sum near 

 Magnesian A ^ t and 15 fe ^ of ^ at 273 1 

 ^ Limestone. [ ^ ^ J 



Coal Measures. 



1 W. Gibson, in 'The Geology of the Country between Newark & Notting- 

 ham' 1908, pp. 13-17. 2 G. Dunston, 1896-97, p. 522. 



