gs Se ee 
- convenient level of reference. 
80 E. W. Hilgard—Geology of Lower Louisiana. 
Fontania, it is again a sandbar, with an abundance of pros- ; 
trate trunks of driftwood, coarse sand and pebbles. . 
he green clay stratum No. 4 varies little, either in thick- 
ness or composition, and like the stump-stratum No. 1, formsa — 
he hardpan stratum No. 51 conceive to be the more im- — 
ediate representative of the Loess proper, with which it is 
connected by gradual transition, though at times greatly Te — 
sembling some of the materials of the Orange Sand. It is void 
of fossils. | 
The present profile differs in many respects from those given | 
by previous observers, which lay some distance farther west, — 
where the river now flows. The strata are accordingly as va- | 
riable in an east and west, as in a north and south direction, 7 
and with the exception of Nos. 1 and 2, are such as are noW 
. 
shown in ditches cut into the modern river-bottom deposits. 
observed. These facts indicate the wide spread prevalence, du- | 
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Mississippi of to-day. The Port Hudson profile appears to be ] 
typical, its features being rep ion has | 
not removed these deposits down to the level of the stump 7 
stratum, as is mostly the case. e | 
The Five Islands. 
The chain of five islands rising partly from the sea, partly 
from the coast marsh, 0g mouth of the ‘Atchafalay 
and Vermilion river, have been described by Mr. Thomassy,’ 
* Géologie pratique de la Louisiane; New Orleans, 1860. : 
