108 HOLLAND AND TIPPER : INDIAN GEOLOGICAL TERMINOLOGY. 



197, 1869). Named from the hill-station in Assam (25° 32'; 

 91° 55'). The associated rocks are very similar to the " Transi- 

 tions " of Bihar in composition and in order of succession, being 

 largely quartzites, slates, and schists, closely folded. With the 

 rocks of sedimentary origin is associated a mass of greenstone or 

 epidiorite. the So-called ' Khasia trap.' 



Sikandarmalai Stage.— Named by R. B. Foote {Mem., Geol. Surv.. 

 hid., XX, 11, 12, 1883), after the Sikandar Malai, 3| miles south- 

 west of Madura. The fourth of the divisions into which the 

 metamorphic rocks of the Madura district are divided. (See 

 Allagiri stage.) 



Siliceous Limestone group.— Term introduced by W. King (Rec, 

 Geol. Surv., Ind., XXII, 157, 1889) for one of the divisions 

 of the Perrnocarboniferous of the Salt Range. He divided the 

 group into — 



Upper Productus Limestone, 



Siliceous limestone (Middle Productus Limestone). 



Simiaite. — Name given by A. Schrauf (Verh., h. k. Geol. Reichs, 43, 

 1 870) for a kind of pholerite occurring near Simla. 



Simla slates.— Name applied by H. B. Medlicott (Mem., Geol. Surv., 

 Ind., Ill, part 2, 17, 33, 1864) to the slates occurring below the 

 Blaini beds in the Simla area. Included by R. D. Oldham (Rec, 

 Geol. Surv., Ind., XXI, 134, 1888) in his Carbonaceous system. 

 Named after the hill station (16° 5' ; 78° 56'). 



Siphonotreta beds. — See Neobolus beds. 



Sirbu shales. — One of the stages in the Lower Bhander series of the 

 Upper Vindhyans distinguished by F. R. Mallet (Mem., Geol. Surv., 

 Ind., VII, 27, 28, 83, 1869) from Sirbu hill (24° 22'; 81° 4'), 

 north of Amarpatan in Rewah State. 



Sirmur series. — The name officially adopted (Man., Geol. Ind., 1st 

 Ed., 1879, 524) for the lower of the two divisions of the 

 Sub-Himalayan system, originally distinguished by H. B. Medlicott 

 (Mem., Geol. Surv., Ind., Ill, 17, 1864) as the Subathu or Lower 

 Sub-Himalayan series. The name Subathu having become 

 restricted, the Sirmur series is divided as follows : — 



3. Kasauli stage. 



2. Dagshai „ 



1. Subathu „ ..... 



