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Smaller Mississippian and Lower Pennsylvanian Calcareous Foraminifers from Nevada by Paul Louis Brenckle

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Smaller Mississippian and Lower Pennsylvanian Calcareous Foraminifers from Nevada by Paul Louis Brenckle CUSHMAN FOUNDATION FOR FORAMINIFERAL RESEARCH SPECIAL PUBLICATION NO. 11 SMALLER MISSISSIPPIAN AND LOWER PENNSYLVANIAN CALCAREOUS FORAMINIFERS FROM NEVADA BY PAUL LOUIS BRENCKLE FEBRUARY 7, 1973 Price $10.00 TABLE OF CONTENTS ABSTRACT 5 ACKNOWLEDGMENTS 5 INTRODUCTION 5 METHODS OF STUDY .. 6 LOCALITIES 6 STRATIGRAPHY 6 Previous Work 6 Arrow Canyon Range 8 Ward Mountain .. _ .. _ .. __ . __ 10 Moorman Ranch 11 Butte Mountains 12 FORAMINIFERAL ZONATION 12 SUMMARY 19 SYSTEMATIC PALEONTOLOGY 19 Incertae Sed is. __ ._._.... _... _.. _. __.__ .___ ._. __.. ____ .__.. _..... _ 20 Calcisphaerids 20 Radiosphaerids 20 Superfamily Parathuramminacea 20 Family Parathuramminidae 20 Genus Bisphaera 20 Genus EOl'oiutina 21 Genus Parathuramlllina 21 Family Earlandiidae 21 Genus Earlandia 21 Genus Paracaligella _. ___ ._._. __ ..__ 24 Family Tuberitinidae 24 Genus Eotuberitina 24 Family Moravamminidae 24 Genus Turrispiroides 24 Superfamily Endothyracea 25 Family Tournayellidae ........ _ ._ ... _..... 25 Suhfamily Tournayellinae 26 Genus Eoforscllia 26 Genus Septabrunsiina 27 Genus Septagiolllospiranelia 28 Genus Septatoumayella 29 Genus Toumayelia 30 Genus Uviella .. _ .. _..__. 31 Subfamily Chernyshinellinae 32 Genus Chemyshillelia 32 Genus Palaeospiropiectammina 33 Family Endothyridae 35 Genus Endotllyra 36 Subgenus Endolhyra 36 Subgenus Gioboendothyra 44 Suhgenus Tuberendothyra _..._....._......._... __ .. __.... __ .._.. 46 Genus Eoendothyrallopsis 48 Genus Piectogyrilla ._..... _... _.......... _..... _. ___ . _. ___ ._. __ .__ .... __ .__ .__ ...._.......__ ._.... __ .. _._..___ .. _. __ ..... _..... __. 50 Family Bradyinidae 51 Genus Endotliyranopsis 51 Family Tetrataxidae 55 Genus Tetra/axis 55 Family Archaediscidae 58 Genus Arcllaediscus ........ _...... __ ._......... 59 Genus Asteroarchaediscus .____ .._._._._._._ .. __ 61 Genus Neoarchaediscus 62 Genus Planospirotiiscus 64 Genus Quasiarchaediscus 65 Family Biseriamminidae 67 Genus G /obil'a/I'ulilla 67 Family Quasiendothyridae 69 Genus Planoelldothyra 72 Superfamily Fusulinacea 73 Family Ozawainellidae 73 Genus Millerella 73 Genus Eostaffefla 74 Superfamily Ammodiscacea 76 Family Ammodiscidae 76 Subfamily Ammodiscinae 76 Genus Brullsia 76 Genus G IOlllospira 76 Superfamily Miliolacea 76 Family Nubeculariidae 76 Subfamily Ophthalmidiinae 76 Genus EosiglJloi/illa 76 REFERENCES CITED 76 FIGURES 1. Index map of measured sections 6 2. Arrow Canyon Range 7 3. Arrow Canyon Range 8 4. Ward Mountain 9 5. Moorman Ranch 10 6. Butte Mountains 11 7. Correlation of global foraminiferal zones with North American and European time-strati­ graphic units and with the foraminiferal zones of the type Belgian Carboniferous (from Sando et al., 1969, and Mamet and Skipp, [970) 12 8. Division of measured sections into foraminiferal zones and series, based on data gathered from samples listed on right side of each column 17 9. Cross sections of SeplalOlIrt/ayelia (redrawn from Grozdilova and Lebedeva, 1960) 26 10, Sagittal section of Palaeospiroplectammin(l (redrawn from Conil and Lys, 1964) 34 I L Morphological features of Ellt/othyra (modified from Conil and Lys, 1964) 36 12. Axial section of Tetralaxis (redrawn from Conil and Lys, 1964) 55 13. Axial section of A rchaediscus with 5% volutions (redrawn from Grozdilova ill Dain and Grozdilova, 1953) 59 14. Whole specimen and cross sectional views of GloiJil'lll"U/iIl(l (redrawn from ReicheL 1946) 66 TABLES I. Foraminiferal occurrences at Arrow Canyon Range .... 13-14 2, Foraminiferal occurrences at Ward Mountain 15 3. Foraminiferal occurrences at Moorman Ranch 16 4. Foraminiferal occurrences at Butte Mountains 16 5. Key to genera of the TournayeIlidae 25 6. Genera and subgenera of the Endothyridae 35 7. Genera of the Archaediscidae 60 PLATES I. Ca\Cisphaerids, Radiosphaerids. Bisplwera, EO\'ollltilla, Paralililrallllllilla, Ear/al/(Iia, EOlilberililla, Turrispiroides opposite page 22 2. PlIrllcaligella, Eoforschia, $'epillbrunsiiflll, Seplag/omospiranella opposite page 23 3. Seplaglolllospirallellll, Sepia 1011 J'Ilay ella. Toumayella, Chemyshinella. U~·iella. Palaeospirop/ec­ lammina, ElldothYl'a (EmlolhYl'lI) opposite page 38 4. Endolhyra (Em/orI1Yl'a) opposite page 39 5. Endolhyra (Elldolilyra) , Ent/olhyra (G'oiJoelldothyra) , Elldolhyra (Tuherendothyra) opposite page 46 6. Elldothyra (Tuherendothyra). PleclOgyrif/a, Eoelldotilyral1opsis opposite page 47 7. Eo('ndotllyrallopsis, Entiolllyrllllopsis opposite page 52 8. Endoll1yrllllopsis, Tetralaxis, A rchaediscus opposite page 53 9. A rellaedisells, A sleroarcilaedisCIIs, N eoarc/wcdisclIs, Planospirodisclls, Qua.l'iarclwediscus'!. Globi­ m/I'u/illll opposite page 70 10. Giobil'(/I~'lIiillll, P/anoC'lI1iolhyra, M il/erella, Eosigllloiiin(/, EoslaffC'lIa, Brunsia, G /olllospira opposite page 71 SMALLER MISSISSIPPIAN AND LOWER PENNSYLVANIAN CALCAREOUS FORAMINIFERS FROM NEVADA PAUL LoUIS BRENCKLE1 ABSTRACT tion is given to Don Eicher of the University of Seventy-seven ~pecies of smaller calcareous foraminifers Colorado for advice during the study. Bruce belonging to thirty-two genera and fourteen families, and Curtis of the University of Colorado provided two groups of uncertain affinity are distingulshed in valuable criticisms of the text. John Wray of the Mississippian and Lower Pennsylvanian strata from four Marathon Oil Company, Bernard Mamet of the localities in southern and eastern Nevada. Most belong to the Superfamily Endothyraceae, a group characterized by University of Montreal and Raphael ContI of the skew, planispiral, or erect growth, a simple or cribrate University of Louvain, Belgium, helped in the apertme, and a layered wall of secreted calcite. Five new fossil identifications. John Chronic and Don species are named. Eicher of the University of Colorado, Calvin The Mississippian foraminifers permit recognition of assemblage ZOnes hased on the global zonation scheme of Stevens of San Jose State College and Ralph Bernard Mamet. The Pennsylvanian strata are not zoned. Langenheim of the University of Illinois provided Formations studied in the Arrow Canyon Range, north­ guidance in the field. Robert Carpenter of the central Clark County, include tbe Crystal Pass Limestone, University of Colorado assisted in photographing Dawn Limestone, Anchor Limestone, Bullion Limestone. the plates, and Marathon Oil Company made Yellowpine Limestone, Battleship Wash Formation, Indian Springs Formation, and the lower part of the Bird Spring available a scanning electron microscope to photo­ Formation. The Joana Limestone was studied southwest graph whole specimens of the foraminifers. Texaco, of Ely, Nevada, at Ward Mountain in the Egan Range, Incorporated drafted the maps. Finally, my wife, and the lower part of the exposed Ely Limestone was Joan, is affectionately thanked for assisting in the studied northwest of Ely in the vicinity of the Moorman Ranch and in the Butte Mountains. preparation of this report and acting as a sound­ The upper part of the Crystal Pass Limestone in the ing board for my ideas. Arrow Canyon Range contains foraminifers that appear to be late Kinderhook in age, but the lower beds lack INTRODUCTION stratigraphically useful foraminifers. The entire formation has been previously assigned to the Late Devonian on the Until recently, Mississippian calcareous foramin­ basis of conodont as'emblages. The Dawn Limestone ifers were little studied in North America. The which disconformably overlies the Crystal Pass Limestone pioneering American works on these organisms is early and middle, and, possihly, late Osage in age. The successively overlyjng Anchor and BulIian Limestones con­ in the 1950's and early 1960's, although useful, tain only sparse, nondiagnostic foraminifers, but, based On described a fauna of only limited diversity and their stratigraphic position. they are late Osage to middle did not utilize the wealth of taxonomic and strati­ Meramec. The overlying Yellowpine Limestone and the graphic information available from foreign sources lower beds of the Battleship Wash Formation contain a well developed middle and late Meramec fauna; however, in Europe and Asia where Carboniferous foramin­ the upper part of the Battleship Wash is middle to late ifers have been intensively studied for many Chester with no evidence of an intervening early Chester years. The publications of Mamet, Skipp and other fauna. The Indiana Springs Formation and the lowest workers in the last few years, however, have pro­ part of the overlying Bird Spring Formation are late vided an awareness of the variety of North Amer­ Chester. The remainder of the Bird Spring that was measured was deposited in Morrow lime, ican microfaunas and of their similarity to foreign At Ward Mountain the lower member of the Joana assemblages. Limestone has a late Kinderhook fauna. The upper member In the western United States Mississippian is Osage in age. foraminifers have been studied at scattered loca­ Foraminifers are scarce in the lower part of the exposed Ely Limestone at the Moorman Ranch and Butte Mountains tions in the Cordilleran region (E. J. Zeller, 1957), sections. The microfaunal associations suggest a Morrow in eastern Nevada-central Utah (Chilingar and age for these rocks. Bissell, 1957; Woodland, 1958), New Mexico (Armstrong, 1958, 1967), Idaho (Skipp, 1961; Skipp and Mamet, .1970; Marnet et al., 1971), ACKNOWLEDGMENTS northern Arizona (Skipp et at., 1966; Skipp, This study was made possible through NDEA 1969) and the northern Cordillera (Sando et al., and NSF grants administered by the University of 1969).
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