May 31, 1901.] 
In short, the King Solomon ore-body has 
had a mode of formation roughly analogous 
with that of the limonite ore deposits of the 
Great Valley of the Appalachian region, and 
of the limestone regions of southern Missouri. 
Such accumulations of ferruginous matter as 
the result of deposition from waters of ordi- 
nary surface temperature, and circulating within 
several hundred feet of the surface of the earth, 
are of common occurrence in many parts of the 
world, and may be found in other sections of 
northwestern California, but they are not often 
auriferous to an appreciable extent. It is its 
gold contents which make this King Solomon 
deposit so remarkable. 
To the writer, the scientific interest of the 
preceding facts appears to be in their bearing 
on the question of the power of ordinary sub- 
surface waters to dissolve and redeposit gold 
under conditions not favorable to the produc- 
tion of iron pyrites. Weseem to have here a 
clear case where metallic gold has been put 
through the same process of solution, concen- 
tration and precipitation as has the staining 
material, the oxides of iron and manganese. 
Oscar H. HERSHEY. 
BERKELEY, CALIF., Jan. 20, 1901. 
CURRENT NOTES ON PHYSIOGRAPHY. 
TALLULAH GORGE, GEORGIA. 
THE studies of Hayes and Campbell on the 
southern Appalachians have made us familiar 
with the general features of a contested drain- 
age area in northeastern Georgia, where the 
headwaters of the Savannah (Tugaloo) river 
are capturing those of the Chattahoochee. Some 
further details of the changes thus effected are 
described in a brief essay on ‘the Geology of 
the Tallulah Gorge,’ by S. P. Jones (Amer. 
~Geol., XXVII., 1901, 67-75). The gorge is 
narrow, steep-sided, and over 500 feet deep; 
the river flows through it in a succession of 
cascades and rapids; it is evidently a young 
river course. The precise order of events in 
the development of the gorge does not appear 
to have been made out ; indeed the author here 
cited does not seem entirely convinced of the 
process of capture as an efficient cause for the 
new order of things. Yet it is certainly signifi- 
SCIENCE. 
871 
cant that the gorge, unusual if not unique in 
sharpness of form among the southern Appa- 
lachians, should occur in immediate association 
uy ¢ 
TALLULAH Qt, 
with a group of features whose systematic rela- 
tions would seem to point unequivocally to the 
invasion of one river basin by the head branches 
of another. 
In view of the open form and gradual descent 
of the Chattooga valley in contrast to the nar- 
rowness of the Tallulah gorge and the rapid 
descent of the river through it, one may reason- 
ably conclude that the first was captured much 
earlier than the second. This makes it seem 
probable that the Tallulah formerly followed 
a course near the railroad line, and that its 
entrance into the Chattooga is the result of di- 
version by the headward growth of a creek on 
the line of the gorge; although a somewhat 
different opinion is expressed in the article here 
abstracted. 
PREHISTORIC LANDSLIDES IN THE ALPS. 
CERTAIN Alpine valleys contain huge accu- 
mulations of mountain waste, described as mo- 
raines by earlier observers, but now interpreted 
as landslides (see SCIENCE, II., 1895, 618). The 
latest special study on this subject is by J. Ober- 
holzer (‘Monographie einiger prahistorischer 
Bergsturze in den Glarner Alpen,’ Beitr. Geol. 
Karte der Schweiz, n. f., IX. Lief., Bern, 1900). 
It discusses a number of large prehistoric slides 
in the neighborhood of Glarus, giving abundant 
details as to structure, source, path, volume, 
etc. A colored map, 1 : 20,000, shows the geo- 
logical formations of the district in the slides as 
well as in the mountains. Some of the slides 
still bar their valleys and hold back lakes ; 
