GEOLOGICAL TABLE. 



409 



I. GEOLOGICAL TABLE. 



III. 



Formations or 

 Pkriods. 



1. Tremadocian. 



2. Snowdonie 



1: 



3. Wenlock. 



IV 



4. Ludlow. 



5. Hercynian. 



6. Eifeiiau. 



7. Clymenian. 



8. Bevnician. 



9. Demetian. 

 10. Permian. 



Names of Strata. 



Longraynd slate. (Bangor, Wicklow.) 

 Lingula flags = Primordial group. 

 Festiniog slate. Potsdam sandstone. 



I Llandeilo flags ) Bala or Coniston 



1 Caradoc sandstone ) group. 



( May-hill sandstone = Clinton group. 



\ Woolhope and Dudley limestones. 

 L. Ludlow, Aymesti-y lime., U. Ludlow. 

 Spirifer sandstone; Rhine. \ Killas, or 

 Plymouth limestone. >- Old Red 



Petherwin limestone. ) Sandstone. 



Carboniferous limestone (shale and coal.) 

 Coal-measures. (Millstone grit, coal, &c.) 

 Magnesian lime. = Zechsteiu. (Perm.) 



VI. 



f 11. Cone 

 1 12. Salif 



VII. 



Q VIII. 



IX. 



ichylian. 

 Saliferous. 



!1.3. Liassie. 

 14. Toarcian. 

 1-5, Bajocian. 

 16. Bathonian. 



I 17. Oxfordian. 



J 18. Corallian. 



19. Kimmeridgian. 

 V 20. Portlandian. 

 ( 21. Wealden. 

 ( 22. Neocomian. 



/ 23. Albian. 



24. Cenomanian. 

 I 25. Hippuritic. 



I 26. Senonian. 



( New-red-sandstone = Bunter. 



i (?kluschel-kalk = Ceratite limestone.) 



Red marls = Keuper. Lias bone-hed. 



L. Lias = Sinemurien & Liasien. 



Marlstone, Alum-shale. (Thouars.) 



Inf. Oolite, Fuller' s-earth. (Bayeux.) 

 f Great Oolite. (Stonesfield.slate ; G. Ool. 

 t Bradford cl. Forest m. Cornbrash.) 

 ( Kello way rock = C'allome7i,Jy'Ov\). 

 1 Oxford clay. (White Jura.) 



Coral-rag and Calcarious grit. 



Kimmeridge clay. (Dorsetshire.) 



Portland stone and Purbeck beds. 



Hastings sand and Weald clay. 

 |- Speeton clay? (Neuchatel.) 

 { Lower Green-sand, & Aptien, D'Orb. 

 Gault. (District of the Aube, or Albe.) 

 Upper Green-sand. (Mans, Cenomanum.) 

 Chalk-marl and L. Chalk = Turonien. 

 ( Chalk with flints = Baculite limestone. 

 1 Maestricht chalk = Danien, D'Orb. 



XI. 



27. Londinian. 



28. Nummulitic. 



g XII. 29. Falunian. 

 ^ XIII. 30. Icenian. 



Thanet sands. Plastic clay, London clay. 

 Bracklesham; Barton; I.Wight; = Parisien. 

 Hempstead; Fontainbleau; = Tongrien. 

 Faluns of Touraine ; Bordeaux, Vienna. 

 Crag of E. Co. = Sub-apennin,'D' Ovh. 



