288 WYKNE : GEOLOGY OF KUTCH. [PAET II. 



as an iatrusion or exposure of the underlying stratified traps. It is 

 most probably the latter, as the tertiary beds must be locally thin and 

 dykes are unknown in these rocks. 



About four miles to the north-east of Buddresur somewhat rising 

 ground formed of the traps separates the upper tertiary rocks from 

 their extension to the eastward, and continuing in the low ground is found 

 for a short distance along the coast. The rock is generally of the decom- 

 posing augitic variety, compact basalt being only seen at one spot. 



Westwards of Toona the upper tertiary rocks, similar in character 



to those already described, occupy two bay-like 

 Toona. 



recesses, indenting the general boundary of the trap. 



They dip generally at very slight angles from the traps, and rest quite 

 unconformably upon their denuded surface, the lowest beds being general- 

 ly conglomeritic and containing trap pebbles, agates, fragments of laterite, 

 &c., with which the oyster band of Wowar occasionally appears. 



In the Sungul stream north of the village, some thick bedded yellow 

 sandstones, parts of which are coarse and shelly, are extensively quarried 

 for building purposes. This rock is traceable to the east as far as Toona 

 Bunder, where it is more calcareous and flaggy. 



In the banks of the creek west of Sungul, the trap just beneath the 

 tertiary rock has a remarkably decomposed appearance, being highly 

 ferruginous, variously coloured and veined with haematite. One or two 

 large crystalline masses of pseudomorphous silica, ? after Aragonite, were 

 observed in the trap. 



The trap flows of the eastern portion of the Dora hills present the 

 usual alternations of basaltic, amygdaloidal, and decomposing varieties ; 

 concretionary and basaltic trap frequently columnar occurs near their 

 base. In the middle portion vesicular, amygdaloidal, and decomposed 

 flows with a few agates, and some purple bands may be found succeeded 



( 288 ) 



