344 Hilgard on Drift in the Western and Southern States, : 
an appearance rarely extends connectedly beyond a few yards, 
nor is it likely it ever should, however stupendous the scale o 
the glacier. Nor will any one, acquainted with moraines and 
their material, be likely to mistake an aqueous deposit for a 
moraine, or vice versd. 
In Desmoines county, Iowa, according to Hall, the drift con- 
sists of “partially stratified deposits of clay, sand and gravel, 
with boulders of primary and secondary rocks irregularly dis- 
tributed through the mass, though usually most abundant in the 
lower portion.” These boulders in the description of Lee county 
are spoken of as “worn and rounded masses” of various rocks, 
occurring in distant localities. We have the same in Henry 
county; in Van Buren, this deposit furnished ‘a mass of sill- 
ceous wood,” which ‘presented none of the water-worn charac- 
ters of a boulder; but the angles were as sharp and well defined 
as if it had never been removed from the spot where it was at 
. first buried.” In Washington county, again, we find mentioned 
“a heavy deposit of drift material presenting the usual charac- 
teristics of this formation, and consisting of irregularly stratified 
beds of sand, gravel and clay, with an average thickness of from 
forty to sixty feet.” : i 
The above, taken verbatim from Hall’s Towa Report, might 
serve as a very fair description of a good portion of the Or- 
ange Sand of Mississippi, the only difference being the greater 
size of the boulders in the more northern locality; a merely 
quantitative variation. 
In Missouri the phenomena are the same. The drift there, 
The latter remark is interesting, as it shows precisely what I 
found to be the case in the eastern: pebble belt of Mississippl. 
The pebbles there are almost exclusively derived from the sili- 
ceous group of the Carboniferous, which occurs only in patches 
farther northward, but underlies the pebble strata themselves 
(Miss. Rept., p. 17, ff). 
- But Swallow goes 0 
stratigraphical position. 
This, also, is precisely the predicament of the Orange Sand 
deposits, : 
