. 160 
APPENDIX. 
to Bokaria have found them on the borders of Lake Aral; 
and now, on the authority of Mr. Crawfurd’s discoveries, 
we establish them in a considerable district of the Burmese 
empire beyond the Ganges. 
5. In many of the specimens from near Prome, we find a 
soft green and yellow sandstone resembling that of our 
plastic clay formation. Mr. Crawfurd describes these as 
associated with reddish clay intermixed with sand and peb¬ 
bles, in words that are almost equally applicable to our 
English plastic clay-pits at Reading or Lewisham. He 
found them in many places where he landed along the 
shores of the Irawadi; and near Pugan * and Wetmasut 
they were associated with brown coal and petroleum, pre¬ 
cisely as we find them containing brown coal all over Eu¬ 
rope, and connected with wells of petroleum near Parma, 
and also in Sicily, and near Baku on the w r est coast of the 
Caspian. Near the petroleum wells of Wetmasut, Mr. 
Crawfurd also found large selenites resembling those that 
occur at Newhaven in our plastic clay. In Ava, as in 
Europe, they seem to be co-extensive with the clay-beds of 
the tertiary formation. 
6. The transition limestone appears, from the few speci¬ 
mens we possess, to be of the same character w T ith that of 
Europe, but in these specimens there are no organic re¬ 
mains. At a small hill four hundred feet high, called 
Manlan Hill, near Wetmasut and the petroleum wells, it 
is associated with grauwacke. There are also specimens of 
grauwacke much charged with carbonate of lime from so 
many distant points along the Irawadi, that, in the absence 
of better information, we may conjecture the fundamental 
* On the west shore of the Irawadi, opposite to Pugan, springs of 
petroleum ooze from hills composed of immense masses of blue clay ; 
and if wells were dug, it might be collected as at Wetmasut.— Mr. 
Crawfurd's Notes .' 
