C. U. Shepard on a new locality of Meteoric Iron. 347 
ceased; while yet the volume of water carried by those chan- 
nels greatly exceeded that which corresponds to the era of the 
second bottoms, south, or to the bottom prairie of Missouri. 
he only sea-beach terrace now existing on the Gulf coast, and 
with which the second bottoms show a manifest confluence of 
level and material, is from 18 to 24 feet above tide-water. But 
the evidences of sea-beach or tidal action extend far back into 
the interior (Miss. Rept. p. 29), so that in fact, the second bottom 
of the Pascagoula exhibits that structure, and not the usual one 
resulting from flowing water, throughout its course. The same 
structure, moreover, extends to some elevation into the border- 
ing uplands, where these sands overlie the Post-pliocene beds an 
Orange Sand. 
The present beach terrace of the gulf coast cannot, therefore, 
be considered as the true measure of the amount either of de- 
pression during, or re-elevation subsequent to, the Champlain 
epoch. Whether the great absolute elevation of some of the 
Orange Sand ridges of Mississippi and Alabama (probably ex- 
ceeding in some cases, 700 feet) necessitates the assumption of 
even a greater depression than the present beach-marks would 
indicate, the known facts are hardly adequate to determine. 
University of Mississippi, July 12, 1866. 
— 
Art. XLVII.—New locality of Meteorite Iron in Cohahuila, North- 
ern Mexico; by CHARLES UPHAM SHEPARD. 
For my knowledge of this most remarkable locality 1 am in- 
debted to the following communication of my friend Prof. For- 
rest Shepherd of New Haven, Conn., who, twenty-seven years 
ago, furnished me the earliest notice of the fall of a meteoric 
stone at Little Piney, Mo. The weightiness of the present con- 
tribution makes ample amends for so protracted a silence. 
o 
the department of Cohahuila. This I am enabled to do through 
the kindness ‘and perseverance of my esteemed friend Maj. E. 
Nueva Leon, and to each of whom I am indebted for protection 
es. 
.+he route pursued by Maj. Hamilton was as follows (see map): 
