INTRODUCTORY LETTER.



John R. Procter, Director Kentucky Geological Survey:
   SIR: In submitting the accompanying report on the Pound
Gap Region, and also the report of Assistant J. M. Hodge, in
extension of the same, it seems hardly necessary to recur to the
difficulties which have occasioned delays in the publication of
the results of field work in the upper counties. Perhaps it is
sufficient to say, that while endeavoring to make the best use
of the limited time available for field work, I have very fully
shared in your desire to avoid hasty conclusions, and this espe-
cially in a field so important as this proves to be, and one of
which so little was previously known. There still remains some
uncertainty as to the place in the general section of some im-
portant beds. As to this, it may be hoped that work in adjoin-
ing localities will supply the data for more satisfactory solutions
of such stratigraphical problems.
   The discussion of the dynamic geology of this interesting
region is limited to the requirements for an intelligent view of
the economic geology of the mountain region.
   Finally, it has been the aim of the writer, by the aid of
diagramatic sections and of photo-engravings, to place in com-
pact form before the reader much that is of special interest as
relating to this field.               A. R. CRANDALL,
                     Assistant Kentucky Geological Survqey
   LEXINGTON, Ky., June 15, 18&I.