1867.] JTJDD LDfCOLNSHIEE WOLDS. 243 



above Tealby these sands are much thinner than in the valley of 

 Stainton, which lies directly to the east. 



3. In places where the junction of the two series can be seen, the 

 dip of the Hunstanton Limestone and other Upper Cretaceous beds is 

 found to be different from that of the beds below. The most striking 

 example of this, with which I am acquainted, is in the section above 

 Langton-by-Spilsby, where the dip of the chalk and Hunstanton 

 Limestone is 3° E., while that of the sands below it is 15° E. 



b. Succession of Beds. — The extensive series of rocks (sands, sand- 

 stones, grits, limestones, clays, and ironstones) which are seen on the 

 western side, and in the inliers of the Lincolnshire Wolds, fall natu- 

 rally into the three main divisions, which, however, in different parts 

 of the county are of very varying thickness and importance. There 

 is perhaps no place where the whole of these members can be so 

 well seen and studied as at the village of Tealby and the country 

 immediately surrounding it ; I have therefore ventured to suggest as 

 a provisional name for the middle and most highly fossiliferous por- 

 tion of the formation that of " the Tealby series." The divisions, as 

 seen in this district, are as follows : — 



(1) ITie Upper Ferruginous Sands, non -fossiliferous, about 20 feet thick. 



(2) The Tealby Series, consisting here of alternate beds of sandy clay and 



limestone, with an extensive and interesting suite of fossils, from 40 to 

 60 feet thick. 



(3) ITie Lower Sand and Sandstone, with few fossils, from 30 to 40 feet thick 



(see section, fig. 4). 



Fig. 4. — Section from WillingTiam House to Binhrooh. 



a. White Chalk. d. Tealby series. 



b. Hunstanton series. e. Lower Sand and Sandstone. 



c. Upper Ferruginous Sands. /. Blue Clay and Slaty beds. 



c. The JJpi^er Ferruginous Sands. — This is a bed of tolerably per- 

 sistent character, consisting of coarse yellowish or greenish-brown, 

 sometimes pebbly sand. Brown oxide of iron occurs, forming con- 

 centric concretions and thin laminse lying between or cutting across 

 the beds. As seen at the surface, it is frequently of a bright-red 

 colour, which, however, is due to the washings from the red beds 

 above, and is never observed in deep sections. At Thorpe-le-Yale, 

 and several other places situated on the inliers of the Wolds, this bed 

 may be well studied ; but the best exposure with which I am ac- 

 quainted is that in the pits above Langton Hall, already alluded to. 

 The section as seen here is as follows :- — 



