118 
The country-roeli of the lead, silver, and tiii-heariiig region of TVIount Alb > 
Irvinebanli, Dry Rivor, and part of Watsonville probably belongs to the 
the Hodgkinson and Palmer Gold Fields. At Mount Albion the strata consist of thicK- 
bedded, fine, grey, hard, siliceous sandstones, sometimes approaching quartzite, and a ay 
somewhat pyritous, and grey and dark shales. These rocks, in the mountain on w ic 
the Mount Albion, Lady Jane, and Barossa Silver Mines are situated, are 
by numerous faults, which traverse the field in every direction, and cut it up in o s 
pieces, the dip and strike being totally different in each of these sections. 
The sandstone of No. 1 Lady Jane Shaft and the shale of the Mount Albion Mine 
at the depth of 114 feet are plentifully marked with plant-impressions, which, howevei, 
are quite undistinguishable. 
At Silverfield, about a mile and a-half south-south-east of Mount Albion, sum . 
strata, with, however, a larger proportion of shales, form the matrix of argen i erou 
.^alena lodes. The strata strike west-north-west and underlie at high angles to aoutn- 
south-west, but do not appear to be disturbed by faults to anything like the same exten 
as the Mount Albion strata. , . , , , -n ^ TJiver 
Similar strata extend from Mount Albion through Trvinebank to the Dry Kive 
at Newelltown, a distance of about forty miles. At Irvinebank numerous tin lodes occu 
in these rocks. At the Dry River numerous argentiferous galena lodes, some copp 
lodes, and a lode of magnetic ironstone occur among grey and black slates or shales an 
greywackes, together with a bed of blue limestone, striking north and south, i coum 
not find any fossils in the strata worth preserving, although the limestone showei ra 
of corals on -n'eathcred surfaces. . . 
In the Great Western District, near Watsonville, a group of tin-mmes lies ii . 
band of slates and greywackes, intervening between the granite of W atsonvdle and Bi 
porphyry of the dividing range between the Walsh and Herbert Rivers in tdie latte ot 
which the maiority of the tin-mines of the Western District are situated^ 
greywackes and slates extends from east to west, broadening considerably to the eu t. 
The strata dip for the most part at comparatively low angles to the south-west. T 
deposits of till and copper ores in this district have a marked tendency to leave the 
fissure lodes and replace to some extent the material of the stratified rocks. 
In the neighbourhood of Alount Albion a series of shales, sandstones, and gnts 
ronlace the porphyry, which has extended for some distance to the east. In this 
formation are the silver-lead mines ot Alouut Albion and Silverfield. These striita avo 
a general east-north-east and west- south-west strike, while their dip may be either o 
north-north-west, or south-south-east, or vertical. In Mount Albion itself (the 
tain), the sandstones and grits predominate, and the strata are intersected by a networK 
of faults, between which they strike and dip in every direction. At the surface, i 
siliceous sandstones and gi-its of Mount Albion have an almost vitrihcd appearance, 
and might almost be classed as quartzites, and often weather in large spheroids, i ^ 
granite blocks. When followed down in the mines, however, they have much more 
appearance of ordinary unaltered rocks, the difference being apparently, to some exten 
at least, due to the loss of the “ quarry water ” in the strata exposed at the surface. 
The road from Mount Albion to Georgetown, which runs at first southward down 
Albion Creek and then westward down Oakey Crook to near the junction of the at ei 
with Gibbs Creek, traverses sandstones, grits, and shales like those of Mount - lo > 
clipping on the whole to the S.E. at about 50°, although the strata are much disturbe 
by faults, and the dip is frequently reversed. Near the last crossing of Oakey 
the stratified rocks are replaced by a mass of porph^y, with round clear ^e 
quartz, not very large orthoclase crystals, and a dark mineral, which may be weat 
