REVIEW OF OLD AND NEW STANDARDS OF PLEISTOCENE DIVISION 433 



Mediterranean 

 shorelines 



Milazzian Stage, 



55-60 meters. 



Pre-Milazzian 

 regression. 



Sicilian Stage (= 

 Cromerian), 

 90-100 meters. 



Pre- Sicilian 

 regression. 



Quaternary formations of the British Isles 



fir Glaciation = Saxonian-Mindelian 



Maximum glaciation, "lower Boulder- 

 clay" north of Thames-Bristol channel, 

 near coasts ; fragmentary shells of arctic 

 species left by glaciers ; marine deposits 

 unknown. 



Preglacial banks of Sewerby, Gower, and 

 Ireland, with modern marine shells; 

 warm land fauna in river beds and 

 coastal grottoes. 



f Yoldia myalls shales of Norfolk ; marine 

 transgression; sea becomes deep; sand, 

 clay, ooze; many arctic shells. Top of 

 Yoldia myalls stratum, 10 meters above 

 mean sealevel. At top deep-sea ooze, in- 

 complete, due to ice invasion; boulder- 

 clay ; angular blocks of clay and marine 

 sands intercalated erratically — Bridling- 

 ton crag — from bottom of North Sea, 

 from 50 to 80 meters ; fauna 87 per cent, 

 arctic = Sicilian, 100 meters. 



Forest Bed of Norfolk, estuarine 



General temperate character of the 

 fauna of mollusks and vertebrates. 



[Wey bourn and Chillesford Crag= ? Period 

 of I Glaciation — Scanian-Gunzian.] 



[Red Crag, Pliocene 

 north Italy.] 



= Astian Stage of 



British 

 shorelines 



Unknown 



4-8 meters 



90-100 meters 

 probably 



6-8 meters 



Notes by Osborn, 1921. — The above table presents a number of inter- 

 lineations in square brackets which will serve to connect Deperet's 

 coordination of 1920 with the preceding and succeeding text of this 

 article. Following Geikie, the generally accepted correlation of the 

 beginning of Quaternary time in East Anglia, Norfolk (Osborn, 1915.1, 

 pages 252-264), is as follows: 



Forest lied, of Cromer = First Interglacial Time. — Warm, north temperate 

 mammal fauna, also tundra fauna. 



Weybourn Crag (Essex) and Chillesford Cray (Norfolk) = Time of I Gla- 

 ciation. — First northern and arctic marine Mollusca on British east coast. 



Red Crag = Upper Pliocene. — Warm continental fauna similar to that of the 

 Astian stage, northern Italy, closing with evidences of a colder climate. 



Beneath the Forest Bed there has been discovered recently by J. Reid 

 Moir a bed of giant flints of human manufacture, an industry which 



