SECTION OF DOWN CLIFFS. 



77 



Section of Down Cliffs, at Toad's Cove, near Bridport Harljout . 



LiTHOLOGY. Thickness. Organic Remains. 



Elevation. feet. 

 400 ft. Zone of Ammonites Jurensis. 



No. 



1. Brown sands, sometimes micaceous, ^?»w(OMzYes o^a/i?u<s, Rein., at Burton Cliff. 



with large sandstone nodules in layers 70 



Zone of Ammonites communis. 



2. Dark-grayish sandy marl, very mica- 



ceous 72 Fossils rare, and indeterminable. 



300 ft. 



3. Brownish marly limestone, containing Ammonites serpentinus, Schlot., u4. communis, 



great numbers of Ammonites ser- Sow., A. hifrons, Brug., Rnquinianus, 



pentimts and otter Upper Lias shells. d'Orb., Plenromya unioides, Roem., Venus 



The Middle Lias comes up to the pumila, IMiinst., Mhynch. acuta, Sow., 



lower part of this band of stone, for and RhyncJi. Moorei, Dav. 

 Ammonitus spinatus has been found 



in it by Mr. Day 2| 



Zone of Ammonites spinatus. 



4. Dark-gray, sandy, micaceous marl 18 Ammonites spinatus, 'Zm^. JBelemnites hrevi- 



formis, Ziet, 



5. Indurated sand, forming large sand- 



stone blocks 8 



6. Light-brown sands, more or less indu- Found no fossils to enable us to determine 



rated, and very micaceous 56 whether the bed belongs to this, or the 



lower zone. 



200 ft. Zone op Ammonites margaritatus. 



7. Bluish marl, which forms a well- 



defined band in the section G — 8 



8. Grayish, sandy, laminated marls, with Ammonites margaritatus, Mont., Am. jimhri- 



irregular layers of nodules 20 atus. Sow., Belemnites elongatus, Mill., 



' Pleurotomaria Anglica, Sow., P. expansa. 



Sow., Pleuromya unioides, Roem., Pecten 

 cequivalvis. Sow., Limea acuticostata, 

 Miinst., Li7na TIennanni, Miinst., Pinna 

 Hartmanni, Miinst., BhyncJiotiella acuta. 

 Sow., R. tetrahcedra, Sow., R. spinosa, 

 1 Schloth., Gryphcea gigantea. Sow. 



9. Foxy-coloured sandstone, with from 



12 — 16 irregular bands of stone form- 

 ing the "rough bed" of the workmen 40 



10. Band of Crinoidal limestone Fentacrinus subangidaris, Mill. 



11. Gray sandy clay, in parts micaceous... 20 

 100 ft. Band of ferruginous septarise. 



12. Gray laminated sandy clay 17 



