268 Scientific Intelligence. 
formations” by some of the followers of Werner, and regarded as of 
palzeozoic age, were really secondary. Now we are called upon to go 
much further; for these same strata belong to the flysch, and therefore — 
constitute what is by no means the base of the eocene system. ‘To the 
mee geologist who is old enough to remember when all the soft 
learn that the clay of London was in the course of accumulation 
marine mud at a time when the ocean still rolled its waves over the 
vertebrate animals had lived and died in succ 
he Geographical Limits of the Chalk Formation by LEoPoLD * 
vox Bone: (from the Monatsberichte der Akademie der Wissenchafien 
u Berlin, fiir 1849, p. 117.:\ Compare also, Be ieuthee iiber die 
Nestieiti und die Greases der Kreide- ean il Bonn, 1849. Aus 
‘den Verhand. des naturhist, Ver. der. heinlande ; Sid from the 
Quart. J. Geol. Soc., No.:21.)—The small ‘extent towards the poles 
which the chalk formation attains, compared with the Jurassic strata, 
and still more with the pa BOLL oic deposits, has been regarded by Dr. 
n in Scotland, of Calmar, Mitau, TTwer and Casan. 
Glands the chalk does not reach so far n orth; the last appears 
" co al coast ist the emend of Rathlin near the Giant’ $ ye a: 
roug! 
: east. im 
Siberia from the Ural to-Ochotzk, and from the Altai to the Icy Sea, 
Ee so n iputely and carefully examined by so many mining 
lists ands rs, that:we may well doubt the 
