Reviews — Brief Notices. 527 



writes a conclusive cliapter on the complex-structured Foraminifera 

 in the Australian Tertiary System, and fairly shows that the oldest 

 Tertiary beds of the Australian Series can be no older than Oligocene, 

 and that the Eocene formations are not represented in the continent 

 as at present known. So far as the author can judge he correlates 

 the Australian beds with the European equivalents as follows : — 



Kalimnan = Pliocene (Lower). 



Janjukian = Miocene: Aquitanian to Tortonian. 



Balcombian = Oligocene : Priabonian to Kupelian. 

 Mr. E. B. Newton, who was present at the meeting, allows 

 us to say that in his opinion Mr. Chapman's conclusions are 

 substantially correct, the evidence of the Poraminifera being of 

 especial value and importance in Tertiary times, while the Molluscan 

 evidence strongly supports the Foraminiferal. 



The stratigraphical notes bearing on the sequence of the strata are 

 put together in a masterly fashion, will be of great value to 

 workers both in and out of Australia, and will, we believe, add 

 considerably to Mr. Chapman's reputation. 



V. — Our Eastern Coal-field. 



DR. NEWELL AKBER'S long-awaited paper on the Geology of 

 the Kent Coal-field has now appeared in the Transactions of the 

 Institute of Mining Engineers, xlvii (5), 1914, pp. 677-724. After 

 a brief historical sketch the author gives the evidence which he 

 has utilized consisting of an account of the various borings. He 

 then discusses the form of the basin and its boundai'ies, the dip and 

 strike of the beds and the faulting, with the contours of the 

 Palaeozoic floor. The age of the Carboniferous rocks met with, their 

 lithology, types of coals, and flora and fauna occupy another section, 

 and the paper ends with conclusions, summary, and bibliography. 

 From the summary we learn that the field has an acreage of 

 128,000, of which a large portion lies under the sea. The general 

 strike is 30° S. of E. and N. of W. and the dip (in the only two 

 places where available) is 2 to 3. The area is a syncline occupying 

 an anticline with folds of an Armoricau trend. The northern 

 boundary seems for the most part south of the northern coast- 

 line of Kent. Upper and Lower Carboniferous beds are present, 

 the latter exceeding 450 feet in thickness with surface denuded 

 before the deposition of the Upper Series. The Coal-measures 

 themselves consist of the Transition (1,700-2,000 feet) and the 

 Middle (2,000 feet), the Lower with the Millstone Grit being 

 unrepresented. They are grey; no red beds, Espley rocks, nor 

 Spirorhis limestones occur. Igneous rocks have not been proved, and 

 ironstones and limestones are either absent or very rare. The coals 

 are well distributed, often of considerable thickness and value, but 

 have a tendency to split. Altogether a highly valuable contribution 

 to the geology of the South-East of England. 



