20 VOLCANIC ROCKS.—CASE IV. 
17. Rep Cray (Decomposed Ba- 
salt). List No. Rd 34. 
Stony-hut Creek, Mount Black- 
wood. 
Partly amygdaloidal, dark red, earthy 
clay, with a conchoidal fracture. 
18. DECOMPOSED BASALT. 
List No. R = 
S.W. of East Creek, Western 
Port. 
Has become a reddish, earthy clay, 
enclosing small nodules of similar com- 
position, coated with brown jiron-ore. 
19. Rep, BASALTIC CLAY. 
Western Port, east side. 
More argillaceous than No. 18. 
20. Rep, BASALTIC CLAY. 
Flemington. } sheet 1 N.W. 
Not differing much from No. 19, 
except that it is more friable and full 
of yellow veins. 
21. BAsALTIC CLAY. 
Flemington. 4 sheet 1 N.W. 
Resembles No. 20, but is even less 
homogeneous and coherent. 
22, DECOMPOSED BASALT. 
Queen’s Ferry, Western Port. 
A mottled, steatitic clay; fracture of 
steatitic portions flat conchoidal, 
23. DECOMPOSED BASALT. 
Western Port, east side. 
Converted into a mottled, greenish 
prown and white, granular clay, rough 
to the feel; still shows concretionary 
lines- 
24, DECOMPOSED BASALT. 
Raleigh's Punt, Saltwater River. 
4 sheet 1 N.W. 
Structure completely obliterated : 
has changed to a mottled, yellow and 
white, earthy clay. 
25. DECOMPOSED BASALT. 
Queen’s Ferry, Western Port. 
Has become converted into a red 
and greyish-white, banded clay, The 
greyish-white portion is mottled white, 
magnesian clay. It presents a smooth 
even surface, when cut. 

26. DECOMPOSED BASALT. 
Same locality as last. 
Consists only of the felspathic 
portions of the basalt. In color and 
character resembles the greyish-white 
portion of No. 25. 
27. DECOMPOSED BASALT. 
Flagstaff Hill, Melbourne. } sheet 
1 S.E. 
Converted intoa soapy clay, retaining 
little but the felspathic elements of the 
rock. It is traversed by thin, ramify- 
ing veins of white, magnesian clay. 
28. BAsALTIC CLAY. 
Same locality as last. 
Greyish-white and somewhat earthy 
in appearance, but smooth, when cut. 
29. Basartio Cray. List No. R, 
Point S. W. of East Creek, 
Western Port. 
Mottled or marbled grey and white, 
cut surface very smooth, soapy to the 
touch. 
30. BASALTIC CLAY. 
Western Port, east side. 
Color light dirty-grey, not very 
smooth to the touch, discolored by fer- 
ruginous matter, and concretionary. 
81. BasaLtic CLAY. Map No. Rd 40, 
Batman’s Hill, Melbourne. sheet 
1 S.E. 
Cream-colored, streaked with veins of 
white, magnesian clay, along the course 
of which it readily comes asunder; not 
very soapy to the touch, except where 
the clay is present. 
32. DECOMPOSED BASALT. 
King street, Melbourne. } sheet 
1 S.E. z 
Brown, grey and yellowish-brown, in 
bands, with thin divergent seams of 
“ kaolin.” 4 
33. AMYGDALOIDAL BASALT. 
List No. Rd 34. 
Stony-hut Creek, Mount Black- 
wood. 
Cavities filled with a white and red- 
dish, soap-like mineral, in some ‘in- 
stances translucent. It is traversed by 
yeins of a red hydro-silicate of alumina. 
‘Base dark brown. 
