OF WESTERN AND CENTRAL INDIA. 



series, so that they are intercalated with traps pro- 

 bably 4,000 or 5,000 feet lower than those of 

 Bombay. The accompanying sketch section will 

 illustrate this. East of Bombay for several miles 

 (about 10 or 12) the traps dip steadily at from 5° 

 to 10° to the west, so that higher and higher beds 

 are constantly exposed to the westward, and the 

 highest are those seen in the Islands of Bombay 

 and Salsette. It should be remembered that the 

 lowest beds seen in the Konkan, east of Bombay, 

 viz., the horizontal beds which stretch away from 

 near Kallian, where the western dip commences, 

 to Matheran hill and thence to the foot of the 

 ghats, are not necessarily the lowest beds of the 

 trap, as their base is not seen. Trile, the Nagpoor 

 and Berar beds are not necessarily the oldest beds 

 either, for we have no .proof that the basement 

 beds of the trap are everywhere of the same age, 

 or what is the same, that volcanic outbursts com- 

 menced at the same time over all the area covered 

 by them.* All that is proved is, that the Nagpoor 

 intertrappeans are associated with the lowest 

 traps seen near Nagpoor, and the Bombay inter- 

 trappeans with the highest seen near Bombay, 

 and as both belong to one series, it is fair to 



* That they are, however, approximately of the same age 

 throughout a large portion of their range appears probable from 

 their resting on the Bagh beds and their equivalents with only 

 slight unconformity, and from the intercalated sedimentary 

 bands which occurr close to the base of the series containing the 

 same species of fossils over so large an area. This is the case 

 from Baroda to Jubbulpoor and Nagpoor. 



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