A GEOLOrilCAL TIME-SCALE. WITH EXAMPLES OK FOSSILIFEROUS ROCKS. 



PLEISTOCENE 

 PLIOCENE 



CRETACEOUS 



I I KIMMEKIDUIA 

 S \ CORALLIAN 



' CALLOVIAN 

 BATHONIAN 



PLIENSBACHIAN 

 I SINEMt'RlAN . 

 I HETTANGIAN . 



ORDOVICIAN 



CAUBRtAN 



PRECAMBRIAN 



1 sand, alluvium, lieuctieti. 

 1, peat, si 



AlliiviHiii, ifcc, aa above ; vall«y -gravel' 

 Norfolk yorest-hetl. ^^'exfo^c^ Omvels. 

 Noi-wifli and Red Crags 



tufa, peat, shell-beds, 



lioulder-clays, brick-earth. 





Palermo Liinestoue. 



Foederliaii 



Die»itiau 



Foederliaii Sauda, Belfiii 



GIobigeriDa Lst,, Mallii. 

 Heaiico Limestone. 



FoiitaiDobleau SaQdst'Hi 

 Sables d'Etampes. 

 Piiabona Marls. 



tlmnii)toii Saui 

 Lias, AlarlstoDe, Clevelaod Irfiii» 



I'pper Lias, Cotteswold 

 Mid Lias, V ■ ' 

 Lower Lias 



White Lias, Penartli 

 Pebble Beds, Varie^i 

 MaKnesian L 



Elgin Sandstone, Tea-gi'ct 



Simdslone. 

 1 Maria and Sandatouen, Penrith Beds 



Coal Measures 

 Millstone Grit. 

 Mountain Limestom 



I'pper Devonian 



Middle ., "H Kl-.I Si.ii.i-t..r 



I Weiiliick and Woolhope Series. 

 I Tarannon and Llandovery Serle.<< 



Bala, Cbirbury and Caradoc Series . 

 Llandeilu and Middleton Series 

 Arenig. Shelve, au<l Sklddu» . 

 Tremadoc and Shioeton Beds ■ 

 Lingula Flags ... 



Harlfib, Ciierfai. and Hartahili Serii 



of rocks of whicli i 



oredulv Beds 



a (pa 



Cassian and Raibl 1 



Rothllegeude. 



ther: 





c'hicbti'ii. 

 I Raib 

 Mnschelkalk. Bui 



Zeclistei 

 Rothllee 

 Bohemian g 



Terrain houiller. 

 Moscow Linieatoiie. 

 Lst. of Vist and Toiirn 



Psauiuiitesdu Cnndni) 

 Calceola LimesUuie. 

 Hunsriick Slater. 



Gotland Limestoiie. 

 CyrtograptuB Shales. 

 Pentauienis LimestoiK 



Grfes de May. 



orthnueraK Limeatoiif 

 Ceratopyge Limestone. 

 Gleans Sliules. 

 Andrarum Limestonf. 

 Eophyton Sandstone. 



ipemioat liave yielded fi 



KELATIVE LENGTHS OF EPOCHS 



CRETACEOUS, 



CARBONIFEROUS. 



ORDOVICIAN, 



PRECAMBRIAN, 



