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Juday, Chancey (ed.) / Transactions of the Wisconsin Academy of Sciences, Arts and Letters
volume XXI (1924)

Ulrich, E. O.
Notes on new names in table of formations and on physical evidence of breaks between paleozoic systems in Wisconsin,   pp. [71]-107 ff. PDF (13.3 MB)


Page [71]


NOTES ON NEW NAMES IN TABLE OF FORMATIONS AND
    ON PHYSICAL EVIDENCE OF BREAKS BETWEEN.
           PALEOZOIC SYSTEMS IN WISCONSIN
                         E. 0. ULRICH
  Introductory note by W. 0. Hotchkiss. The Geological and
Natural History Survey of. Wisconsin is deeply indebted to the
writer of this paper, and to the United. States Geological Survey
for the cooperation which has made possible the important results
set forth. The field work on which Dr. Ulrich's work is based be-
gan in 1913 and has been carried on during short periods of a few
days or weeks each summer since, as the pressure of his other duties
permitted. The work has added greatly to our knowledge of the
Paleozoic formations, and while this is more than ample justifi-
cation, it is satisfying to record that the results have been imme-
diately applicable to economic uses as well. The successful search
for local supplies of shale for road surfacing in western Wiscon-
sin would have been impossible without Dr. Ulrich's work as a
basis. The guidance of drillers of deep wells and the close identifi-
cation of the strata in these wells which has made possible the id-
iing of desirable water supplies also rests largely on the results of
his work.
  Dr. Ulrich's work has resulted in very much more. detailed
knowledge of the strata and has shown the need for giving names
to the new units recognized. It has also been deemed advisable
in his paper to discuss somewhat fully the physical evidence on
which the limits of the various formations are determined.
                  THE BURROUGHs DOLOMITE
  Near the top of Burrough's Bluff, at the northern end of Savan-
nah, Ill., and also in and above Charles Miles' quarry near the
southeastern edge of the same city the easily recognized Brainard
shale at the top of the Maquoketa facies'of the Richmond group is
succeeded unconformably by a variable succession of bluish to
*Published by permission of the Director of the U. S. Geol. Survey.


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