1918.) The Fifth Indian Science Congress. elxxix 
Ten miles further west is the Chak Dalla locality. Here 
the oil seeps from chalky limestones with complex structure. 
The seepage is in the main hill range, and the absence of the 
Chharat stages makes it difficult to define the exact horizon of 
the rocks in which the oil occurs. 
The oil occurs in beds which overlie massive limestones and 
probably correspond with the passage beds elsewhere. 
e only other seepages known in this zone are those at 
the eastern end of the Khaire Murat ridge about fourteen miles 
southwest of Rawalpindi. At the extreme eastern end of the 
limestone outcrop, where it crosses the Bussala stream, there 
‘8 a small oil and gas seepage from a vertical rib of limestones 
during the brackish water phase of the Lower Tertiary sea. 
e passage beds of dena 
~ Seepage is at Jabs and this locality has yielded i “i 
the limestones dipping’ aks ee th the Upper Tertiary 
ipping s enea | ’ 
Sandstone and soe & steeply 
