bluff formations of the Mississippi River and its tributaries. But as this
loess proves to be intimately associated with the glacial formations of
the same region, it is probable that it will eventually be relegated to
the glacial division. Perhaps the division may eventually grow to such an
extent that its field of operations will include the whole Quaternary
geology.

Second, a division of volcanic geology is organized, and Capt. Clarence E.
Dutton, of the Ordnance Corps of the Army, is placed in charge, also with
a strong corps of assistants.

Third and fourth, two divisions have been organized to prosecute work on
the archæan rocks, embracing within their field not only all rocks of
archæan age, but all metamorphic crystalline schists, of whatever age they
may be found. The first division has for its chief Prof. Raphael Pumpelly,
assisted by a corps of geologists, and the field of his work is the
crystalline schists of the Appalachian region, or eastern portion of the
United States, extending from northern New England to Georgia. He will
also include in his studies certain paleozoic formations which are
immediately connected with the crystalline schists and involved in their
orographic structure.

The second division for the study of this class of rocks is in charge of
Prof. Roland D. Irving, with a corps of geologists, and his field of
operation is in the Lake Superior region. It is not proposed at present to
undertake the study of the crystalline schists of the Rocky Mountain
region.

Fifth, another division has been organized for the study of the areal,
structural, and historical geology of the Appalachian region, extending