THE 



GEOLOGICAL MAGAZINE. 



NEW SERIES. DECADE 



VOL. 



No. X.— OCTOBER, 1875. 



OBIGIUAL AETICLES. 



I, — On the Geology of Central Sumatra. 1 



By E. D, M. Verbeek, 

 Superintendent of the Geological Survey of Sumatra. 



THE fossils, which will be described hereafter by Dr. Giinther, 

 F.E.S., Prof. T. Rupert Jones, E.R.S., H. Woodward, F.R.S., 

 and H. B. Brady, F.R.S., were found in the years 1873 and 1874, 

 partly in rocks of the " Padangsche Bovenlanden " (Highlands of 

 Padang), Government of the West Coast of Sumatra, and partly in 

 marls and limestones of the Island of Nias. 



In order to show the position of the fossiliferous rocks to each 

 other, and to the plu tonic and volcanic rocks which accompany them, 

 I offer the following brief sketch of the geology of some parts of Su- 

 matra, as far as it is known from the investigations of our Survey. 



I. — Highlands of Padang (Government of the West Coast of Su- 

 matra). See Map, Fig. 1, and Section, Fig. 2. 



Fig. I. Map or a Portion of Central Sumatra. 



Scale 1 : 1,400,000. Degrees of the Equator. 



1 This Memoir on the Geology of a part of Sumatra, including notes on Borneo 

 and Java, hy Herr B. D. M. Verbeek, Superintendent of the Geological Survey of 

 Sumatra, is introductory to a series of palaeontological papers, descriptive of Fossils 

 from the West Coast of Sumatra, to be published with Illustrations, in the Geo- 

 logical Magazine, by the authority and with the assistance of the Dutch-Indian 

 Government. — Editor. 



DECADE II.— VOL. II. — NO. X. 31 



