HEADON BEDS. 



129 



Section of the Headon Series of Headon Hill, measured hy Edward 

 Forbes in October 1852 (lantli afeio Corrections made in 1888.) 



Upper Headon 

 Beds, 

 46 ft. 7 ins. 



Middle Headon 

 Beds, 

 33i ft. 



- 1 



2 



2 



3 



f Blue and yellow clays and marls, passing 

 into grey laminated clays with crushed 

 Paludina lenta and Potamomya gre- 

 garia - - - - . 



Variegated clays with Potamomya, espe- 

 cially in the lower part. A C-inch 

 hand of ironstone with Paludina occurs 

 in the centre of the hed. Serpula 

 Brown and green clays. Potamomya, 

 Paludina lenta, Melanopsis fusiformis - 

 Limestone, carbonaceous at the top j 

 details : — 

 Carbonaceous 



Sandy, with crushed Ldmncea 

 longiscata and Planorbis 

 euomphalus 

 Full of fine shells ; Ldmncea 

 longiscata, Planorbis euom- 

 phalus, P. lens, P. obtusus, 

 P. rotundatus, P. platy- 

 stomus, Paludina, &c. 

 Rubbly, with Planorbis euom- 

 phahis - . - 



Bluish and purplish clays, passing into 

 Limestone. Melanopsis carinata, 

 Limncea longiscata, Planorbis platy- 

 stoma, P. obtusus, Bulimus politus 

 Limestone, compact in places, with many 

 shells and lines of nodular concretions 

 in places. >Shells as in the limestone 

 above ----- 

 Greenish-white compact sands, carbo- 

 naceous at the base. Serjmla tenuis - 

 Blue clays and sands, crowded with 

 univalve shells. Cerithium ventri- 

 cosum, C. concavum, C.pseudo-cinctum, 

 Cyrena obovata, Ostrea, Natica. The 

 shells are much broken at the lower 

 part (at 2 feet down) and larger than 

 further northward - . - 



Yellow sand, with bands of lignite and 



clay. Cerithium concavum 

 Blue-gi'een clay with lignite. Fossils 

 few : — Cyrena obovata, scattered Ostrea 

 Limestone. Planorbis euomphalus, 

 lAmnaa longiscata - . . 



'Blue, green, and brown sandy clay, 

 with oyster-beds at about 5 feet 

 from the top. A few fossils in 

 blue clay above ; fossils mostly in 

 the middle and lower part. Occa- 

 sional flint pebbles. Ostrea, 

 Cyrena obovata, Cytherea ineras- 

 sat a, Nucula, Natica depressa, 

 Melania, Fusus, small species. The 

 oysters in this bed are smaller 

 and fewer than at Colwell Bay ; 

 the other marine shells are also 

 fewer - - - - 



Ft. In. 



15 



3 3 

 3 4 



J> 8 



5 



10 

 2 



3 3 



2 

 2 



1 



Q 

 H 



n 

 z 



> 



16 



E 56786. 



