De pets Tellers, sre 
' plans, sections, sketches, diagram 
Mineralogy and Geology. 263 
_ Troublesome Caiion, at the head of the creek bearing this name, 
is entirely basaltic, and the rugged walls, not only of the main 
stream, but also of the little branches, form a most picturesque 
vie 
Ww. 
Below the Cafion, the valley of Troublesome Creek, and also 
that of Grand River near the junction, is occupied by belts of 
modern tertiary sands and marls, like those observed at the en- 
euts the terraces, horizontal strata of whitish and flesh-colored 
nds and I i i i 
no doubt as to the existence of true carboniferous limestones in the 
Middle Park. 
This yolume contains also a valuable Report of P. Frazer, Jr., on 
the mines and minerals of Colorado, and another by Cyrus Thomas, 
on the agriculture of Colorado. : Nant: : 
2. The Gold Fields and Mineral Districts of Victoria, with 
Notes on the Modes of Occurrence of Gold and other Metals and 
Minerals ; by R. Broucu Suytu, F.G.S., & 
for the colony of Victoria, Melbourne. 644 pp. Royal 8vo. 1869. 
(Triibner & Co.)—-We have examined this elaborate volume 
s and maps, and i ented 
printed and accompanied by ample tabular statements, statistic: 
erves known to exist upon the 
4 minimum of 20,000,000 
