1867.] JUDD — LINCOLXSHIEE WOLDS. 231 



elude that the thickness of the red beds at this place is from 12 to 

 14 feet. 



A precisely similar succession of beds is seen in several chalk-pits 

 near Grebby Mill. In the largest of these pits, the supposed repre- 

 sentative of the '^ chalk-marl " may be well studied ; for under the 

 hard chalk (''blue courses" of the workmen) we have 5 feet of 

 " grey courses " almost made up of fragments of Inocerami and 

 other shells. Echini are very numerous, and Terehratula ohesa, Sow., 

 and Rhynclioiiella Cuvieri, D'Orb., tolerably abundant. The Hun- 

 stanton beds here present no new feature. There are also at this 

 place several pits in the sand below the red chalk, which is seen to 

 be coarse, and of a greenish or yellowish- brown colour, or ash- 

 grey, with brown seams running horizontally through it. 



The red chalk is seen in a road-cutting by Grebby Hall, and can 

 be easily traced to Skendleby, running round the sides of a valley 

 formed by a tributary of the river Steeping. A well at Skendleby 

 furnished the following section : — 



1. Rubble and white chalk 6 ft. 



2. Eed chalk 14 ft. 



3. Brown sands in which the springs arise. 



Along the hillsides north-westward from this place the outcrop of 

 the red chalk can be easily traced, as it forms a ridge above the 

 steep slopes of sand. 



Between Dalby and Langton there are two pits, which together 

 furnish a most useful section of the beds of this district : in the one 

 is seen the white and grey chalk, followed by the sponge-bed, the 

 yellow and pink courses, and the upper beds of the dark-red chalk ; 

 in the other we have the lower beds of the red chalk, with about 

 30 feet of the sands below. The lowest course of the red chalk is 

 here seen to be very argillaceous, and contains small shining black 

 and brown pebbles, thus graduating into the sands below, exactly as 

 at Hunstanton. 



Above Sutterby is a small pit of white chalk, in which the red 

 beds are thrown up for a breadth of 9 feet by a double fault. 



On the slope of Harrington-hill, and in several openings above 

 Brinkhill and Driby, the Hunstanton beds may be again seen and 

 their fossils collected. 'North, of these places, the AYolds are cut 

 through by a stream flowing to the north-east and called the Withern 

 Eau. The sides of the valley thus formed are so covered with super- 

 ficial deposits that the position of the red chalk can be given only 

 approximately ; indications of it, however, are seen near the hamlet 

 of Euckland, and all round the sides of the deep longitudinal and 

 tributary valley which runs up to Oxcomb. Near South Ormsby we 

 again recognize the Hunstanton beds by their marked Hthological 

 features and characteristic fossils, and can trace them thence round 

 Holster Dale to Tetford Hill, where they are well seen in a road- 

 section, with the sands below them. Aided by numerous openings, 

 of greater or less extent, combined with the very marked surface- 

 contour of the district, the extremely irregular line of the red chalk 

 outcrop may be traced above Belchford and Scamblesby, and along 



