34 PRIMARY OR PALAOZOIC ROCKS.— CASE Vit. 
engineering purposes. Examples of some of them are exhibited in the 
collection of dressed building stones. In the neighborhood of Castle- 
maine, Sandhurst, Maryborough and other goldfields’ towns, quarries 
have been opened, and the stone has been used in the construction of 
some of the banks and other public and private buildings, 
Flagging. —Excellent, blue flags or paving-stones oceur in seyeral 
districts. 
Those procured from Specimen Gully, near Castlemaine, 
are most extensively used, and will doubtless, ere long, supersede the 
imported Scotch flagging. 
Slates.—Roofing-slates have been procured from seyeral localities ; 
but the quality of those hitherto brought into the market is ver 
inferior. The best, as yet, are from Glen Maggie Creek, a tributary 
of the Macalister River, in Gippsland. 
No quarry has been opened 
there, and probably the cost of transport would preclude the slates being 
raised profitably at present. 

Case VII. 
LOWER SILURIAN. -~ 
( METAMORPHIC IN PART.) 
1, Mıcaorous Sonisrt. ‘ 
Map No. Rb 29B. 
Section 8, Sutton Grange. 3 sheet 
13 N.W. 
Mottled, with peculiar grey micaccous 
bands, 
2. Mica Souist. 
Begg’s Station, near Hopkins’ Hill, 
The mica disposed in very thin layers. 
8. GNEISS. Map No. R 95. 
N.E.of parishof Baynton. } sheet 
51 S.W. 
With decomposed felspar, 
4. METAMORPHIC Scuisr. 
Map No. Re 26. 
South sideof Hardie’s Hill. sheet 
63 S.E. 
Gritty, with quartz grains in layers. 
5. METAMORPHIC Scutsr. 
Map No, Rc 30. 
West of Leigh River, opposite 
Hardie’s Hill, 4 sheet 63 S.E. 
Of a peculiar greenish-grey color, 
fracture slightly hackly, having a tal- 
cose appearance, with a little silvery 
white mica. r 
6. SPOTTED SHALE. : 
Map No, Rb 12. 
Happy Gully, parish of Sedgwick. 
ł sheet, 13 N.W. 
The markings are probably due to 
the development, by metamorphic ac- 
tion, of some augitic (fahlunite) mineral. 
This peculiar kind of shale is only found 
near the junction of the granite and 
Silurian rocks, as at Lancefield, Bayn- 
ton’s Range, the Barfold Ranges, &c. 
7. YELLOW SHALE. Map No. Re 30. 
West of - Leigh River, ‘opposite 
Harde’s Hill } sheet 64 SE. 
Laminated and quartzose, 
8. Mioa SCHIST. Map No, Rb17. 
North of Mount Emu, Sedgwick. 
ł sheet 13 N.W. 
Grey, micaccous bands between yellow 
sandstone. The bands are of about equal 
thickness, 
9. Meramorpnic Stare Rock. 
Map No. Ra 95. 
Dunolly Road. + sheet 14 N.W. 
A band of mudstoneoceurrin g between 
a light-blue, metamorphic rock, with 
spots and markings similar to No. 6. 
ee et. > è 

