SECTION 
TO ILLUSTRATE THE STRUCTURE OF 
BURRAGORANG, NEW SOUTH WALES, 
Scale , 240 Feet to 1 Inch. 
Thickness 
of Beds. 
Nature cf Bed. 
Yellowish and reddish and 
purple coarse Sandstones, with 
abundance of (Quartz pebbles, 
and occasional thin seams of 
Blue Sliaie and Ironstone. 
Base of Hawkesbury Hocks. 
Red Shale.- 
White Argillaceous Shales and 
Sandstones. 
Sandstone in Terraces. 
Coal Seam- 
Shale, Sandstone. 
White and red spotted Shales, 
with Fossil-wood and Glosso- 
pteris. 
Hard white Shale. 
Shale, Sandstone. Conglomerate, 
Fcrr ginous Sandstone. 
Hard white Shales, with plants.'' 
Marine Beds. 
Spinfer Sandstone. 
Spirifers and Stenopora. 
lied and yellow Sandstone. 
Brown Shale. 
Muree Sandstone, with Spirifers 
and Stems of Plants. 
Shale. 
Pebbles of Porphyry and of Coal 
Shale, Sandstone, &C. 
-j-- - -i- - 
Sea bevel. 
Height io feet 
ubove the 
Sea. 
1996 
1576 
1245 
1216 
758 
554 
637 
500 
46S 
410 
402 
350 
312 
310 
287 
240 
230 
200 
The summits are much worn and points of rock left in consequence. Hie whole 
horizontally bedded, and jointed vertically in three planes, S.W., N.N.W., 
and S. The upper beds appear to have a varying slope from 12° to N.W. to 
30° S.S.W., the effect of local displacements as the horizontal stratification is 
prominent. 
Blue Shale in Eastern Escarpment. 
Blochs fallen from above encumber the whole of the slopes, and obscure the 
beds of the Coal Measures, rendering detection of seams by the eye almost 
impossible. 
On West side of Valley, towards head of Lacy’s Creek. 
At the base of the Hawkesbury rocks, blocks fallen and acctimulated so as to 
hide the junction. Dense vines, fig-trees, ferns, and jungle, with pools of 
water. 
Level of Fig-tree, a well-known object on descent where the track branches to the 
Nattai and the Wollondilly. 
Water in springs welling out; temperature of water (20 September, 1865) 59° F., 
mean temperature at Camp 65" and of Wollondilly 64°. 
The surface slope of the Coal Measure beds is about 12" 
Block of Cannel in dry creek, prismatic, 1' 3" thick. 
Upper observed limit of Murec beds (slope of undercliff 18") opposite mouth of 
Nattai. 
In dry creek in Carlon’s land, Shale with Glossopteris. 
Under “Tenoriffe”with fallen red and white Breccia, capped by quartzose sandstone. 
Blocks of Cannel with Glossopteris in dry creek above Chitty’s. 
In low ridge on fiat, N. 25° W. magnetic. 
Cannel 9 inches thick in loose blocks on flat at Chitty’s ; watenvorn. 
Same rock as at Muree and near Worregee on Shoalhaven. 
l^evel of river banks at camp near mouth of Nattai. 
Level of Wollondilly (September 18, 1865) at junction with Nattai. 
Breadth of the Valley there, alwmt 1J mile. 
Barometrically deduced in relation to the above heights. 
