PREFACE. ili 
is to his labors we are most indebted for an accurate knowledge of this part of the Geology of the State.* 
Some of the Post Pliocene localities, near Charleston, were discovered by Prof. L. R. Gibbes; the first 
list, of any extent, of the fossils of that formation, was prepared by him, and published in Mr. Ruffin’s 
Report. 
1 have also to acknowledge numerous other obligations to the cultivators of science in this State. 
To Dr. R. W. Gibbes Iam indebted for many favors, besides his unabated attention to the best interests of 
the Survey from its commencement to its close. 
To Dr. Henry, I owe the opportunity of consulting the numerous rare scientific works in the Library of the 
South Carolina College. ‘Iam under similar obligations to Dr. Ellet, to whose liberality I also owe many 
useful hints, and much valuable information. 
For access, at all times, to his fine collection of recent and fossil shells, and the most liberal use of his 
Library, containing many valuable and rare conchological works, I am under obligation to Dr. Edmund 
Ravenel, of Charleston, who als» liberally communicated to me the result of his observations on the Geology 
of the State. 
To Prof. Gibbes, of the Charleston College, my thanks are due, for assistance in comparing recent and 
fossil shells, but most of all, for preparing for this Report, a synopsis of the Fauna of the State. 
T have also to acknowledge numerous favors received from Dr. Hume, of the Military Academy. 
_ For the means of completing the geological section of the State, I am indebted to the politeness of Major 
Colcock, who placed in my hands a yaluable collection of Reports and Field-notes of Rail Road Surveys of 
the State. 
For a fine collection of Post Pliocene fossils, I am indebted to Dr. Burden, of John’s Island. 
_ From Dr. Barratt, of Abbeville, I received very important assistance in my investigations in Orangeburg, 
Barnwell and Beaufort Districts. I am also indebted to him for the means of comparing the fossils of the 
Burrstone with those of Claiborne, Ala. as well as for many other favors. ‘ 
To the highly intelligent Secretary of the Black Oak Agricultural Society, I owe the communication of a 
fine suit of corals and other fossils from the Hocene of Cooper river. 
It would be impossible, if it were necessary, for me to separate my own labors from those of F. S. Holmes, 
Esq. both on the Ashley and in the Post Pliocene of the State. His fine and valuable <ollection of fossils 
were placed at my disposal, and I have used it without reserve; it is chiefly through his labors that the Ashley 
has already become noted for its organic remains. 
Of the kindness and hospitality with which I was everywhere received, which cannot soon be forgotten, and of 
which it is impossible to think without feelings of gratitude, I can only speak in general terms; for such favors, 
and for the interest, on all occasions, taken in my pursuits, it only remains for me to return my sincere, heart- 
felt thanks. 
M. TUOMEY. 
e ‘ 
OF THE GEOLOGICAL MAP. 
Of the map annexed to this Report, I desire to say one word in explanation. It is obvious, in the nature of 
the case, that absolute accuracy is not to be expected. For instance, I have taken special pains in noting the 
trap dykes of the State, yet I am conscious that, in numerous cases, they are not accurately located; for it 
often happened that they were observed where there were no points of reference to the map. In the upper 
* Perhaps this is not an improper place for me to assume an error into which I led Mr, Ruffin. The external characters of 
the silicious bed of the Burrstone, together with the existence in it of some polythalamia, derived from the calcareous beds, where 
they are common, which | took for infusoria, led me to refer it to the infusorial beds ; and it is so stated in Mr. Ruffin’s Report. 
