ADMINISTRATIVE REPORT 15

in Florida have appreciated this fact and have decided upon a location only after considering reports on the geology covering their properties and surrounding country.. In order, however, that the reliability of such reports be unquestioned they should be prepared by one who is a geologist of recognized standing thereby not only demanding but meriting that confidence be placed upon the results of his investigations.
 The State Geological Survey in the regular course of its investigations has accumulated considerable data relative. to the structure of formations in Florida. Much of this has been published in the various papers on geology as contained in the several an. nual reports but such data are constantly being added to. A study of the structure of formations in Florida is a rather tedious tasl< owing to the comparative slight relief with correspondingly fev, continuous geologic exposures. In addition, erosion, especially by solution and subsidence, has been most 'active in our formations thus increasing the difficulty of working out structure in any particular formation or horizon, It is thus only through detailed work and cautious interpretations that the most reliable results can be obtained.
 Of invaluable assistance in the furtherance of these studies would be topographic maps on which all surface exposures and other related data could be located and on which structure contours could be plotted. In addition accurate well records, based on samples of the drillings taken at frequent intervals, have contributed important data to our knowledge of the succession of formations in Florida. Efforts on the part of the Survey to secure. well samples have had results and such sets of drillings as have been procured have been studied in detail, one paper being published in the Twelfth Annual Report and a second being included in the present volume. Through the courteous co-operation of well contractors and promoters the Survey is at present receiving excellent sets of carefully taken 'well drillings and it is a privilege to acknowledge this co-operation which will add much to our present knowledge of the geology of the State. It is urged that those who contemplate drilling any wells, particularly those that may go to exceptional depth, save samples of the cuttings and submit them to the State Geologist, Tallahassee, Fla., who will study them and submit a descriptive. log. Too much emphasis