Miocene Foraminifera of the Coastal Plain of the Eastern United States Page: 1
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SHORTER CONTRIBUTIONS TO GENERAL GEOLOGY, 1932-33
MIOCENE FORAMINIFERA OF THE COASTAL PLAIN OF THE EASTERN UNITED STATES
By JOSEPH AUGUSTINE CUSHMAN and EDGAR D. CAHILL
In this paper 134 species or varieties of Foraminifera from the
Chesapeake group of Maryland and Virginia, the Duplin marl
of the Carolinas, and the Choctawhatchee formation of Florida
are described and figured. Of these, 2 species or varieties are
first known from the Jurassic, 7 from the Upper Cretaceous, 15
from the Eocene, 11 from the Oligocene, 4 extend into the
Pliocene, 1 into the Pleistocene, and 79 are still living. The
following species are described as new:
Millettella spinata. Massilina glutinosa.
Urnulina rotundata. M. mansfieldi.
Massilina marylandica. Rotalia bassleri.
In the following report the species of Foraminifera
found in the Miocene of the Coastal Plain region of the
eastern United States from Florida to Maryland are
described and recorded. Numerous papers have been
published on this region, some of which, however, are
largely lists. Where the original material on which a
paper was based has not been available for the present
study, the records have been omitted, as it is very
difficult to place the species in their proper position
without seeing the actual specimens.
In a previous paper 1 the senior author has recorded
and figured much Miocene material from this same
general region. In a more recently published paper 2
the Miocene Foraminifera of the Choctawhatchee
formation of Florida were described and figured.
The subject matter of that paper has been used here,
and all the specimens which were available for study
have again been gone over. Through the courtesy of
Mr. Herman Gunter, State geologist of Florida,
it has been possible to use a part of the original figures
that were drawn for the Florida report. These have
been used to illustrate species which are either con-
fined to Florida or are not well represented by good
specimens for illustration in the collections northward
from Florida. The other illustrations have been
drawn directly from material from the more northern
States. Much new material from North Carolina,
Virginia, and Maryland has been available for the
present studies. A list of all these stations may be
found on a later page.
I Cushman, J. A., Some Pliocene and Miocene Foraminifera of the Coastal
Plain of the United States: U. S. Geol. Survey Bull. 676, 1918.
2 Cushman, J. A., The Foraminifera of the Choctawhatchee formation of Florida:
Florida Geol. Survey Bull. 4, 1930.
An attempt has been made to place the species de-
scribed in Bulletin 676 in the present scheme of classifi-
cation and to restudy those species in the light of later
collections. The references under the different species,
therefore, will serve to place those species recorded in
the earlier report and make them consistent with the
present classification and the present understanding of
the limits of specific differentiation, which are more
exact because of the very much greater amount of
material now available for study.
While this paper was in proof Bulletin 9 of the
Florida State Geological Survey appeared, on the Fo-
raminifera of the upper, middle, and part of the lower
Miocene of Florida. This bulletin deals with a wider
range of Miocene material than is included in the
present paper, which is confined to the Choctawhatchee
as far as Florida is concerned. To bring this paper as
nearly up to date as possible references to Bulletin 9 of
the Florida Survey have been inserted under the species
and notes added on the distribution of those species.
There are, however, a number of new records and
new species in Bulletin 9, which are noted below, with
references to page, plate, and figure, that these may be
available to the reader of this paper.
Textularia candeiana D'Orbigny, p. 41, pl. 8, figs. 4a, b.
Textularia foliacea Heron-Allen and Earland var. occidentalis
Cushman, p. 41, pl. 1, figs. 4, 5.
Te.ctularia warren Cushman and Ellisor, p. 42, pl. 1, figs. 6a, b.
Bigenerina floridana Cushman and Ponton, p. 42, pl. 1,
Clavulina tricarinata D'Orbigny, p. 43, pl. 1, figs. 13a, b.
Quinqueloculina candeana D'Orbigny, p. 44, pl. 2, figs. la-c.
Quinqueloculina costata D'Orbigny, p. 44, pl. 2, figs. 2, 3.
Quinqueloculina crassa D'Orbigny var. subcuneata Cushman,
p. 45, pl. 2, figs. 5a-c.
Quinqueloculina chipolensis Cushman and Ponton, p. 45,
pl. 3, figs. 1-3.
Massilina inaequalis Cushman, p. 46, pl. 3, figs. 4a-c.
Massilina bosciana (D'Orbigny), p. 46, pl. 3, figs. 5a-c.
Massilina quadrans Cushman and Ponton, p. 47, pl. 3, figs. 6-8.
Massilina gunteri Cushman and Ponton, p. 47, pl. 4, figs.
Massilina incisa Cushman and Ponton, p. 47, pl. 4, figs. 2-6.
Massilina spinata Cushman and Ponton, p. 48, pl. 5, figs. 1-3.
Massilina spinata Cushman and Ponton var. chipolensis
Cushman and Ponton, p. 48, pl. 5, figs. 4-6.
Massilina spinata Cushman and Ponton var. glabrata Cush-
man and Ponton, p. 49, pl. 5, figs. 7a-c.
Spiroloculina grateloupi D'Orbigny, p. 49.
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Cushman, Joseph A. & Cahill, Edgar D. Miocene Foraminifera of the Coastal Plain of the Eastern United States, report, 1933; Washington D.C.. (https://digital.library.unt.edu/ark:/67531/metadc784443/m1/3/: accessed June 17, 2021), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.