HEADON BEDS. 



133 



longiscata, L. mixta ?, Ij. fusiformis, L. 

 tumida ?, Planorbis rotundatus, P. lens, P. 

 obtusus, Melanopsis brevis, Melania, Palu- 

 dina lenta, Cyrena cycladiformis?, C. 

 obovata, Chara - - . . 



Bed partly concretionary, partly sandy with 

 lenticular masses of broken Potamomya. 

 (Forms Warden Ledge) - - - 



Lower Headon Pure white sand with bright yellow stripes. 



Beds, 82 feet <( No fossils 



4 inches. Blackish-grey sands with bands of Potamomya. 



I Seeds - . - . . 



*Carbonaceous sand and clay, with bands of 

 Potamomya. A strong band of lignite at 

 the base. Seeds. Paludina scarce 



Pale-green sandy clays . . _ 



Limestone, with Potamomya at the top. 

 Planorbis euomphalus, Limncea longiscata, 

 L.pyramdalis, L. sulcata - - . 



Greenish and yellowish clay with lignite 



2 fito 



Imperfect Limneaan limestone 



Pale-greeu marls, with roots in jjlaces and 

 occasional broken Limntsa and Paludina. 

 Melanopsis. (Numerous bands of Pota- 

 momya near the base) - _ _ 



Imperfect Limnaan limestone ; very soft, with 

 crushed shells - - . . 



White and yellowish sand. No fossils 



Hard greenish mai'l. Melanoiisis brevis, Pota- 

 momya, Serpula . - - - 



Sands - - . _ . 



Greenish marl and sandy clay with bands of 

 Potamomya - . - . 



Limestone with Limncea and Planorbis. Fer- 

 ruginous outside. Cyrena ? - - 



Purple calcareous marl, with crushed shells - 



Strong lignite band - - - . 



Limnaean limestone - - . . 



^Greenish clay and sand . . . 



Headon Hill Sands (pale grey sand) 



Ft. In. 



2 6 



3 6 

 8 



4 



2 6 

 2 6 



1 6 



3 

 6 



14 



1 



2 



1 



1 3 



6 



Total 



153 2 



A Section measured in Weston Chine, commencing at the bed 

 marked {*) in the foregoing differs somewhat. 



'Lignite - - - - . 



Green marls, sandy clay, and clay 3 6 or 

 Green clay - - - - 3 to 



Hard line of crushed Potamomya in bright 

 ochreous sand - . - - 



Limncean limestone ; soft and earthy 

 Greenish tenaceous clay, with carbonaceous 

 matter, especially at the upper part. 

 Planorbis and Limncea at the base. Throws 

 out water - - - - - 



Soft earthy Limntean limestone, impure and 

 thinning away and is then marked by aline 

 of shells ----- 

 Pale green sandy marl, with Paludina, Pota- 

 momya, &c. in the lower 3 in. which be» 

 comes harder and more marlv 



1 6 



G 



1 6 



