| ’ AMERICAN 
JOURNAL OF SCIENCE AND ARTS, 
[THIRD SERIES] 
| ae ee ale 
Arr. XLIX.—On the Geological History of the Gulf of Mexico ; 
ty. EK. W. Hitearp, of the University of Mississippi.* 
ith a Map. 
THE colored outline map before you, without much preten- 
Sion to accuracy of detail, shows the general geological features 
of the great embayment, once a portion of the Gulf of Mexico, 
Whose axis is now marked by the course of the Mississippi 
tiver, from southern Illinois to its mouth. I have compiled 
this s map from the best data now extant, accessible to me, wi 
& view to the better elucidation of the succession and character 
of geological events ; and especially with a hope of bri 
bear ae the later formations of the interior of the continent, the 
chron ological record here left by the retiring waters of the sea. 
Marine deposits being better understood and more available ‘for 
8eneral comparison and conclusions than those of inland lakes 
me series here shown would seem, by its original a 
: AD 
| e Rocky i Mountain region, it gee be difficult to find in 
thet ee of the conti 
The subject matter of ‘the present communication is, for the 
great er part, embraced in publications made by myself during 
4° Past ten years ; and to these publications | must refer for 
: the corroborative detail, which in this general summary would 
be out of plac 
* Read before the capa: Association for the Advancement of Science, at 
is, August, 18 
| Am. Jour. Scr—Tump rite esis Va ne a 1871. 
26 
