Ostracoda of the Silurian Decker and Manlius Limestones in New Jersey and Eastern New York
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University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln USGS Staff -- Published Research US Geological Survey 1956 Ostracoda of the Silurian Decker and Manlius Limestones in New Jersey and Eastern New York Frank M. Swartz Pennsylvania State University Frank C. Whitmore Jr. United States Geological Survey Follow this and additional works at: https://digitalcommons.unl.edu/usgsstaffpub Part of the Earth Sciences Commons Swartz, Frank M. and Whitmore, Frank C. Jr., "Ostracoda of the Silurian Decker and Manlius Limestones in New Jersey and Eastern New York" (1956). USGS Staff -- Published Research. 232. https://digitalcommons.unl.edu/usgsstaffpub/232 This Article is brought to you for free and open access by the US Geological Survey at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in USGS Staff -- Published Research by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. JOURNAL OF PALEONTOLOGY A publication of THE SOCIETYOF ECONOMICPALEONTOLOGISTS AND MINERALOGISTSand THE PALEONTOLOGICALSOCIETY with the generous support and cooperationof THE AMERICAN ASSOCIATIONOF PETROLEUMGEOLOGISTS and THE GEOLOGICALSOCIETY OF AMERICA VOLUME30 SEPTEMBER,1956 NUMBER5 OSTRACODA OF THE SILURIAN DECKER AND MANLIUS LIME- STONES IN NEW JERSEY AND EASTERN NEW YORK FRANK M. SWARTZ AND FRANK C. WHITMORE, JR College of Mineral Industries, The Pennsylvania State University, and United States GeologicalSurvey ABSTRACT-Descriptionsand illustrationsare given for 44 ostracode species of the Decker, Rondout and Manlius limestones of the William Nearpass quarries and Dalton Nearpass farm in northwestern New Jersey, and at Austin's Glen and Trilobite Mountain in New York. One brachiopodvariety is proposed.The ostra- code species are distributed through 11 families and 23 genera. Thirty-two species and one variety are new, and there are eight new genera. Holotype or syntype specimensof 13 of Weller's ostracodespecies have been restudiedand are refigured and redescribed. Stratigraphic sections are described to provide details of the ostracodeoccurrences, and zonal potentialitiesare considered.There is an extensive and distinctive suite of ostracodespecies in the uppermostpart of the Decker lime- stone, and at least one well characterizedspecies occurs in middle beds. Species of Leperditiaare common in the Rondout limestone, where other observed ostracodes include only some unidentifiedspecimens of Kloedenellaand more questionably of Eukloedenella.Ostracodes are numerousand diversified in the Manlius limestone, and includeseveral distinctive species that range throughoutthe formation,whereas others are restricted to lower, upper, and possibly middle beds. Successive changes of the ostracode assemblagesand other faunal groups in part are evolutionary, but in part reflect modificationsin environment that affected the animal communities as a whole. New genera described are: Bonneprimites,Limbinaria, Pseudobeyrichia,Lopho- kloedenia, Myomphalus, Welleriopsis, Saccarchites, Thlipsuropsis. New species (genotypes marked with asterisks) are: Bonneprimites? breviformis,Aechmina eupunctella,Limbinaria multipunctata*,L. paucipunctata,L. biangulata, Richina zygalis, Parabolbinacuneospinosa, Velibeyrichiareticulosaccula, V. paucigranulosa, Dibolbina macrosulcata,Pseudobeyrichia perornata*, Kloedenia duplicipunctata,K. crassipunctata,K. aparchoides,Lophokloedenia eufimbriata, Myomphalus dorsinodo- sus*, Welleriopsisdiplocystulis*, Mesomphalusrhomboidalis, M. striatellus, Sac- carchitessaccularis*, Bolbiprimitia limbata, B. teresaccula,Euklo edenella cicatrix, E. manliensis, Kloedenellabipustulata, K. parvisulcata,Dizygopleura angustisulcata, Thlipsuropsisdiploglyptulis*, T. longisulcata, T. digitata, Parahealdia?convexoris; new varieties are: Welleriopsisjerseyensis var. microreticulis,Chonetes jerseyensis var. nondivergens. CONTENTS Page Abstract .......................................................................... 1029 Introductionand acknowledgments................................................... 1030 Correlationproblems of the Decker, Rondout and Manliuslimestones of New Jersey .......... 1030 Order of discussion................................................................. 1032 Description of localities and sections William Nearpass quarries,New Jersey ........................................... 1032 1029 1030 FRANK M. SWARTZ AND FRANK C. WHITMORE, JR. Dalton Nearpass farm, New Jersey ............................................... 1035 East slope of Trilobite Mountain, New York....................................... 1037 Austin's Glen, N ew York ........................................................ 1039 List of species...................................................................... 1039 General zonal values of the Decker-ManliusOstracoda .................................. 1041 Faunas of the Chonetesjerseyensis and Stenocisma lamellata zones of the Decker limestone ...... 1042 Fauna of the Rondout limestone at the Nearpass quarries,New Jerseyv.................... 1044 Fauna of the Manlius limestone at the Nearpass quarries, New Jersey .................... 1044 Fauna of uppermost Manlius beds at Austin's Glen, New York........................... 1045 Animal communitiesand their paleoecologicimplications ................................ 1046 Adductor scars..................................................................... 1048 Orientationsused in descriptions..................................................... 1049 Systematic paleontology.'........................................................... 1050 Appendix: Chonetesjerseyensis var. nondivergens Swartz, n. var ........................... 1090 Referen ces ........................................................................ 1090 INTRODUCTION AND ACKNOWLEDGMENTS study were in part photographed by F. M. Swain under a from the Coun- FAUNAS of the successive Decker, Rond- grant-in-aid out and Manlius limestones of the cil on Research of The Pennsylvania State and were described at that time old William Nearpass quarries in north- University, F. C. in his Master's western New Jersey, were described a half- by Whitmore, Jr., thesis. About half of the photographs have century ago by Stuart Weller (1903) to been in more recent F. M. furnish an important milestone in study of prepared years by Swartz. the Late Silurian stratigraphy and paleon- The of Weller's ostracode tology of the Appalachian region. type specimens Ostracoda are numerous in some of the species are housed among collections of the Decker-Manlius beds. Fifteen ostracode New Jersey Geological Survey at Newark, New of new species from these strata were recognized Jersey. Types species together with numerous other mounted by Weller, in association with larger as- specimens are retained at in the mounted fossil semblages of corals, bryozoans, brachiopods, present collections of F. M. Swartz at The Penn- mollusks and trilobites. Further promise that ostracodes will be invaluable for zona- sylvania State University, University Park, tion and correlation of the Decker-Manlius Pennsylvania, but will at a future date be offered to the United States National Mu- sediments became apparent with discovery of numerous highly ornamented specimens seum, Washington. in collections obtained by F. M. Swartz near CORRELATION PROBLEMS OF THE DECKER, Catskill, New York in 1929, and at the RONDOUT AND MANLIUS LIME- William Nearpass quarries and Dalton STONES OF NEW JERSEY Nearpass farm in New Jersey in 1937. As a step in establishing characters and In the half-century since publication of ranges of the ostracode species, arrange- Weller's studies, correlation of the Decker, ments were made in 1939 for restudy and Rondout and Manlius limestones of New reillustration of Weller's type specimens, Jersey has been subject to varying opinions. and work was also begun on part of the new Problems still remain that probably can be collections. Loan of Weller's ostracode types benefited by tracing zones of the ostracodes was secured through the kindness of Mere- now recognized in the Nearpass quarries dith E. Johnson, State Geologist of New and Austin's Glen areas, as well as by work Jersey. The collections from the Manlius at with additional new ostracode species. Austin's Glen were obtained under the cor- Using corals, brachiopods and trilobites, dial guidance of George H. Chadwick dur- Weller in 1903 correlated the "Decker ing a trip sponsored by the Pennsylvania Ferry" or Decker formation with the Geological Survey. The Nearpass section "Coralline" or Cobleskill limestone of east- was studied during a visit with A. B. Cleaves central New York. Following the opinion of to eastern Pennsylvania and adjoining James Hall, Weller supposed that the Coble- areas, also supported by the Survey. Speci- skill and, hence, the Decker limestone were mens investigated in the early part of the deposited concurrently with Middle Silurian OSTRACODA IN NEW JERSEY AND EASTERN NEW YORK 1031 Niagaran sediments of western New York; Rondout-Manlius limestones of New Jersey, but he called attention to marked faunal and the Keyser limestone of Maryland, differences that he attributed to nearly properly are members of the Helderberg complete isolation of easterly and westerly group and belong in the Lower Devonian basins. The overlying Rondout limestone series. was correlated with part of the type Rond- Ulrich's interpretations of 1912 were ad- out limestone of the Kingston area of eastern vanced in