FORMATIONS AND FOSSILS OF SOUTH MANCHURIA 19 



mation, though lithologically very similar to the overlying Lower 

 Ordovician strata, has a very distinctive fauna that enables the two 

 to be readily differentiated. The Santao may correspond with some 

 part of Grabau's (1922) Peilintze or Lingchiashan formation, in 

 Chihli, as their faunas are similar. 



The Santao formation appears to represent a part of Kobayashi's 

 Wolung series, which he included in the Ordovician. 



DESCRIPTION OF THE STRATIGRAPHIC SECTIONS 



Detailed sections for all the more important localities where the 

 Ordovician and Canadian beds outcrop in South Manchuria are 

 herewith included. The sections are in natural order; that is, the 

 highest beds present or studied are described first, followed by the 

 others in descending order, and since the formations have been de- 

 scribed in the preceding pages the names may be used without 

 further definition. The sections are also arranged in geographic 

 order, beginning with the most southerly. 



KUANTUNG DISTRICT 



The Kuantung district includes the larger part of and practically 

 coincides with the Kuantung Leased Territory. The southern part 

 is covered by the rather massive-bedded quartzite of the Sinian 

 Tiaoyutai formation and the limestones of the Kuantung, Pre-Cam- 

 brian gneiss and gneissoid granites occupy much of the north- 

 eastern part, while most of the northwestern portion consists of 

 rocks belonging to the Cambrian. Therefore, the area of Ordo- 

 vician strata is rather restricted in this district. The most important 

 localities of the Ordovician are found on Kan-tao-tzu Island and 

 on the isolated comparatively small hills situated between Wan-chia- 

 tung and Hsi-tien-chia-tun, south of Aigawa. 



Inai has informed me that fossiliferous limestones occur in the 

 Ssuyen outcrop in the vicinity of Tung-chia-kou colliery, 10 miles 

 east of Chin-chou station on the South Manchurian line. Un- 

 fortunately, however, I have not yet visited this place and conse- 

 quently can not include a description of it here. 



KAN-TAO-TZU SECTION 



Kan-tao-tzu Island lies on the coast 1.5 miles southwest of Aigawa, 

 a famous Japanese farming settlement. Both the Ozarkian 

 and Ordovician strata are finely exposed on this island in the form 

 of a structural dome with Ozarkian formations occupying the cen- 

 tral part, surrounded by the Ordovician in the marginal portion of 

 the island. 



