SECTION OF DOWN CLIFFS. 



IT 



Section of Dozen Cliffs, at Toad's Cove, near Bridport Ilarbom . 



LiTHOLOGY. Thickness. Okganic Remains. 



Elevation. feet. 



400 ft. Zone of Ammonites Jurensis. 



No. 



1. Brown sands, sometimes micaceous, Ammonites opalinus, Rein., tLtJiwrion CWff. 



■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 serpeniimts, Schlot., A. communis, 



great numbers of Amt>wnifes ser- Sow., y/. hifrons, Brug., Raquinianus, 



pentimts und otter Upper Lias shells, d'Orh. , Pleui-omija unioides, 'Roem., Venus 



- The Middle Lias comes up to the pumila, Miinst., Bhynch. acuta. Sow., 



lower part of this band of stone, for and Rhynch. 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, ^vug. Selemnites brevi- 



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 of Ammonites makgaritatus. 



7. Bluish marl, which forms a well- 



defined band in the section 6 — 8 



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



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., Lima Hermanni, Miinst., Pinna 

 Hartmanni, Munst., Rhynehonella acuta. 

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

 ? Schloth., Gryphcea gigantea, Sow. 



9. Foxy-coloured sandstone, with from 



12 — IC irregularbands of stone form- 

 ing the "rough bed" of the workmen 40 



10. Band of Crinoidal limestone Pentacrinus subangularis, M.\\\. 



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

 100 ft. Band of ferruginous septarise. 



12. Gray laminated sandy clay 17 



