126 GEOLoay. 



and the Francisquito Pass are Tertiary, the greater part being Miocene, 

 resembling the Swiss Mohisse and Nagelfluh. In the San Ternando 

 Basin limestone occurs, with fossils apparently of the age of the (Enin- 

 gen beds. Well-developed Eocene beds occur near Eort Tejon. True 

 Cretaceous rocks are not known by the writer, as the so-called Creta- 

 ceous beds are believed by him to be Tertiary. E. W. E. 



Marsh, Prof. 0. C. Ancient Lake-basins of the Rocky Mountain 

 llegion. A7ne7\ Journ. ser. 3, vol. ix. pp. 49-52. 



These lake-basins are of Eocene, Miocene, and Pliocene age, the fauna 

 of each formation being distinct, as well as different from the recent. 

 The author regards the Green Iliver basin deposits as Eocene, although 

 Hayden and others look upon them as Miocene. These deposits are at 

 least 6000 feet thick. S. of the Uintah Mountains was another Eocene 

 lake, and a third of the same age probably existed in E. Oregon, W. of 

 the Blue Mountains. The Miocene lake-basins of the region are, that 

 of the " Mauvaises Terres " district, S. of the Black Hills, known by the 

 White Eiver beds, and an older lake, the 7ohn Day River basiu, on the 

 Pacific slope in Central Oregon. The only Pliocene lake-basin is that 

 of Niobrara, occupying the same area as the Miocene " Bad Lands " 

 district. G. A. L. 



Murray, Alexander. Geological Survey of Newfoundland. Repoit 

 of Progress for the Year 1874. Pp. 75. 8vo. St. John's. 



Geological Eeatures (Gander Bay, &c.), pp. 20-23. Economics, 23, 

 24. Report of Geological Exploration in Port-a-Port and St. George's 

 Bays, by James P. Howley, pp. 27-74. Distribution of the Eorma- 

 tions, 39-56, with details of sections. The formations are L. Silurian 

 (Potsdam, Calciferous, and Levis shales) ; and there are trappean rocks. 

 Eaults and dislocations are noticed, and the occurrences of fossils. L. Car- 

 boniferous rocks are found in one part. General Structure, East Side of 

 Port-a-Port Bay, 56-59. List of chief intrusions of trap, 60. Eaults, 

 61. Carboniferous Eormation, 62-68. Economics (Copper, Lead, Iron- 

 ores, Petroleum, Peat, Gypsum, &c.), 69-74. W. W. 



Nicholson, Prof. H. A. On the Guelph Limestones of North America 

 and their Organic Remains. Geol. Mag. n. ser. dec. 2, vol. ii. 

 pp. 343-348. (B. Phys. Soc. Edin.) 



Describes this group of beds, which forms the uppermost member of 

 the Niagara formation. It is probably not continuous, occurring in 

 separate lenticular masses over wide areas. The fossils are numerous, 

 and many of them peculiar — the predominance of Trimerellidce and Pen- 

 tameri, the great abundance of Gasteropoda, and the prevalence of the 

 genus Megalomus being their most characteristic features. The Guelph 

 formation of Canada=" CedarviUe Limestones," or ^^ Pentamerus Lime- 

 stone " of Ohio. G. A. L. 



Nicholson, Prof. H. A., and W. H. Ellis. On a Remarkable Erag- 

 ment of Silicified Wood from the Rocky Mountains. Can. Jouryi. 

 n. ser. vol. xiv. pp. 148-153, and Be]). Brit. Assoc, for 1874, 

 Sections^ pp. 88, 89. 



Describe a curious fragment of silicified wood from the well-known 



