4 U 
The manner in which these Miocene beds are tilted at this locality 
explains the manner in which the beds of apparently the same age have 
been tilted at The Basin, Daylesford. On Mrs. Allen’s farm there appears 
to be a considerable area of similar deposits. The soil furnished by these 
beds is very poor and there is much pisolitic iron ore in it. 
\_Report sent in J-P-O/.] 
NOTES ON A SKETCH SURVEY OF THE CALEDONIA REEFS 
AT WARRANDYTE. 
By A. M. Howitt. 
The following is a report on a geological sketch survey of a small 
area around allotments 3, 3B, &c., near “ The Island,” parish of Warran- 
dyte, made for the purpose of showing the position of the Caledonian 
group of reefs relative to those on the north in the Nillumbik survey, and 
to those on the south in Quarter Sheet 40 N.W. (Ringwood'-Warrandyte 
survey). 
The rocks are Cainozoic and Silurian. The Cainozoic formation consists 
of sands, clays, and gravels, and in some places auriferous wash, occurring 
in the small gullies and along the creeks and river flats. The Silurian 
rocks are shales, slates, sandstones, quartzites, and coarse and fine con¬ 
glomerates. In the coarse sandstones and fine conglomerates fossil remains 
occur, chiefly encrinite ossicles and stems. One locality south of the 
Caledonia Consols shows an abundance of fossil remains (see x on plan). 
The Silurian beds are much folded, and several anticlinals and synclinals 
were observed and marked on the plan. The pitch, where noted at the 
surface, was to the north. A complete anticlinal fold can be seen south 
of the Reward mine. 
Reefs. 
The Caledonia Reef. —The strike is N. 32 deg. E. and dip 85 deg. 
W. In examining the rocks in the main mullock heap I found blocks 
of a basic dyke, which the manager informed me came from what is known 
in the mine as the “ cross-course ” in the south workings. A full report of 
this mine has been made by Mr. E. J. Dunn, F.G.S., Director of the Geo¬ 
logical Survey of Victoria. 
The Caledonia South Reef. —This is seen on the Ringwood-Warrandyte 
road and at “ The Island.” The strike of the reef is N. 20 deg. E., 
dip 85 deg. E. ; dip of beds 45 deg. W., so that the reef cuts the beds 
at a wide angle. A synclinal fold occurs to the west of this line of reef. 
The Caledonia Reward Reef is situated south of “ The Island ” bend 
of the Yarra at Captain Selby’s. The strike of the reef is N. 20 deg. E., 
dip 83 deg. W. The country dips to the east, so here also the reef cuts 
across the strata. It is close to an anticlinal fold which can be seen plainly 
to the south. The reef is reported as averaging 5 inches wide and yielding 
as much as 4 ozs. per ton where crossing Selby’s Creek on the north. 
The Caledonia Consols Reef (formerly called the Pigtail Reef).— 
The strike of the reef is N. 23 deg. E., dip 83 deg. E. This reef is 
situated about J mile south-east of the Reward mine. The strata dip to 
the west. The company has been working lately on an 8-inch reef at 
the 170-ft. level. This reef is also close to an anticlinal fold (see plan). 
