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Permophiles Issue #39 2001Type Brutonsec. 32, T5S, R6EType Bursumsec. 1, T6S, R4EshelfbasinAboFormationsillRhodes Canyonsec. 12, T12S, R3ESchwagerinaHuecoGroupLOSchwagerinaSchwagerinaSchwagerinaSchwagerinaredHembrillo Passsec. 20, T16S, R3EredSchwagerinaAsh Canyonsec. 20, T19S, R4ESchwagerinaTriticitesTriticitesBursumFm.TriticitesTriticitesTriticitesAtrasadoFormationPanther SeepFormation5 metersFigure 3. Selected stratigraphic sections of the Bursum Formation showing correlation of strata from the shelf (typeBruton and type Bursum) to the basinal facies (Rhodes Canyon, Hembrillo Pass and Ash Canyon) of the Orograndebasin. See Figure 2 for location of sections. Datum is basal Hueco Group limestone and local LO of Schwagerinasuggests that even more well-defined fusulinacean zones couldbe defined there, using zone concepts similar to those used for“Bursumian” zones. Thus, if the “Bursumian” were to beaccepted as a stage, it would represent a much shorter timeinterval than any other Carboniferous or Permian stage, andwould include only one or two fusulinacean zones. Indeed, sucha “Bursumian Stage” would convey no information beyond thatavailable from the fusulinacean zones.Based on the above observations, we conclude the following:1. A Bursumian Stage will always lack an ideal stratotype in theBursum outcrop belt in New Mexico.2. “Bursumian” as now used is equal to only one or at most twofusulinacean zones and represents considerably less time thanother Carboniferous-Permian stages, so the concept of a“Bursumian” stage is no more than a stage name applied to oneor two fusulinacean zones.3. The Bursum Formation has a macroinvertebrate fauna ofessentially Virgilian aspect, so on macroinvertebrates alone, itsaffinities are Virgilian. There is no distinctive “Bursumian”macrofauna.4. The interval called “Bursumian” may work as a substage of26the Wolfcampian, comparable to, but of shorter duration thanthe Nealian or Lenoxian, but of approximately the same magnitudeas the substages of the Asselian (Harland et al., 1990).However, this does not realign the North American stageboundaries to match the new Carboniferous-Permian boundary.5. If there is value in defining a new stage or other namedchronostratigraphic unit (substage) between the Virgilian andWolfcampian, it should be defined outside the Bursum outcropbelt (also see Davydov, 2001).6. The simplest solution has already been advocated—to extendthe Virgilian upward to include the traditional lower Wolfcampian“Bursumian” interval (= fusulinacean zone PW-1 of Wilde, 1990).This may not satisfy the fusulinacean workers, who recognizethe “Bursumian” interval as a distinctive time of transition fromtypical Virgilian to typical Wolfcampian fusulinacean assemblages.However, it accords well with the macroinvertebratefaunal changes, and would allow the “Bursumian” interval ,under a different name, to become a fusulinacean-based substageof the Virgilian. If this strategy is adopted, it would bedesirable to define formally and name fusulinacean substagesfor the remainder of the Virgilian as well.
ACKNOWLEDGMENTSWe are grateful to Greg Wahlman and Garner Wilde forinformation and helpful discussion, though we claim sole creditfor our conclusions.REFERENCESAubry, M.-P., Berggren, W. A., Van Couvering, J. A. andSteininger, F., 1999, Problems in chronostratigraphy: Stages,series, unit and boundary stratotypes, global stratotypesection and point and tarnished golden spikes: Earth-Science Reviews, v. 46, p. 99-148.Baars, D. L., Maples, C. G., Ritter, S. M. and Ross, C. A., 1992,Redefinition of the Pennsylvanian-Permian boundary inKansas, mid-continental USA: International GeologyReview, v. 34, p. 1021-1025.Baars, D. L., Ross, C. A., Ritter, S. M. and Maples, C. G., 1994[a],Proposed repositioning of the Pennsylvanian-Permianboundary in Kansas: Kansas Geological Survey Bulletin 230,p. 5-10.Baars, D. L., Ritter, S. M., Maples, C. G. and Ross, C. A., 1994[b],Redefinition of the Upper Pennsylvanian Virgilian Series inKansas: Kansas Geological Survey Bulletin 230, p. 11-16.Cope, J. C. W., 1996, The role of the secondary standard instratigraphy: Geological Magazine, v. 1996, p. 107-110.Davydov, V. L., 2001, The terminal stage of the Carboniferous:Orenburgian versus Bursumian: Newsletter on CarboniferousStratigraphy, v. 19, p. 58-64.Davydov, V. I., Glenister, B. F., Spinosa, C., Ritter, S. M.,Chernykh, V. V., Wardlaw, B. R. and Snyder, W. S., 1998,Proposal of Aidaralash as global stratotype section andpoint (GSSP) for the base of the Permian System: Episodes,v. 21, p. 11-18.Harland, W. B., Armstrong, R. L., Cox, A. V., Craig, L. E., Smith, A.G. and Smith, D. G., 1990. A geologic time scale 1989.Cambridge, Cambridge University Press, 263 p.Kottlowski, F. E., Flower, R. H., Thompson, M. L. and Foster, R.W., 1956, Stratigraphic studies of the San Andres Mountains,New Mexico: New Mexico Bureau of Mines andMineral Resources Memoir 1, 132 p.Kues, B. S., 1995, Marine fauna of the Early Permian(Wolfcampian) Robledo Mountains Member, Hueco Formation,southern Robledo Mountains, New Mexico: NewMexico Museum of Natural History and Science Bulletin 6,p. 63-90.Kues, B. S., 1996, Guide to the Pennsylvanian paleontology ofthe upper Madera Formation, Jemez Springs area, northcentralNew Mexico: New Mexico Geological Society,Guidebook 47, p. 169-188.Kues, B. S., 2001, The Pennsylvanian System in New Mexico—overview with suggestions for revisions of stratigraphicnomenclature: New Mexico Geology, v. 23, p. 103-122.Kues, B. S., 2002a, Invertebrate fauna of the Bursum Formationtype section (lower Wolfcampian), southeastern SocorroCounty, New Mexico: New Mexico Geological Society,Guidebook 53, in press.Kues, B. S., 2002b, A marine invertebrate fauna from the upperpart of the Panther Seep Formation (early Wolfcampian) nearPermophiles Issue #39 200127Hembrillo Pass, San Andres Mountains, south-central NewMexico: New Mexico Geological Society, Guidebook 53, inpress.Lucas, S. G. and Kues, B. S., 2001, Stratigraphic relationshipsacross the Pennsylvanian-Permian boundary, Oscura andSan Andres Mountains, New Mexico: Geological Society ofAmerica, Abstracts with Programs, v. 33, no. 5, p. A-46.Lucas, S. G. and Wilde, G. L., 2000, The Bursum Formationstratotype, Upper Carboniferous of New Mexico, and theBursumian Stage: Permophiles, no. 36, p. 7-10.Lucas, S. G., Krainer, K. and Kues, B. S., 2002, Stratigraphy andcorrelation of the Lower Permian Hueco Group in thesouthern San Andres Mountains, Doña Ana County, NewMexico: New Mexico Geological Society, Guidebook 53, inpress.Lucas, S. G., Wilde, G. L., Robbins, S. and Estep, J. W., 2000,Lithostratigraphy and fusulinaceans of the type section ofthe Bursum Formation, Upper Carboniferous of southcentralNew Mexico: New Mexico Museum of NaturalHistory and Science Bulletin 16, p. 1-13.Myers, D. A., 1988, Stratigraphic distribution of some fusulinidsfrom the Wild Cow and Bursum formations, ManzanoMountains, New Mexico: U. S. Geological Survey, ProfessionalPaper 1446-B, p. 23-65.Otté, C., Jr., 1959, Late Pennsylvanian and Early Permianstratigraphy of the northern Sacramento Mountains, OteroCounty, New Mexico: New Mexico Bureau of Mines andMineral Resources, Bulletin 50, 111 pp.Rasbury, E. T., Hanson, G. N., Meyers, W. J., Holt, W. E.,Godlstein, R. H. and saller, A. H., 1998, U-Pb dates ofpaleosols: Constraints on late Paleozoic cycle durationsand boundary ages: Geology, v. 26, p. 403-406.Ross, C. A. and Ross, J. P., 1994, The need for a Bursumianstage, uppermost Carboniferous, North America:Permophiles, no. 24, p. 3-6.Ross, C. A., Baud, A. and Menning, M., 1995, A time scale forproject Pangea: Canadian Society of Petroleum GeologistsMemoir 17, p. 81-83.Sanderson, G. A., Verville, G. J., Groves, J. R. and Wahlman, G.P., 2001, Fusulinacean biostratigraphy of the Virgilian Stage(Upper Pennsylvanian) in Kansas: Journal of Paleontology,v. 75, p. 883-887.Skinner, J. W. and Wilde, G. L., 1965, Lower Permian fusulinidsfrom the Big Hatchet Mountains, southwestern NewMexico: Contributions Cushman Foundation for ForaminiferalResearch, v. 16, p. 95-104.Soreghan, G. S. and Giles, K. A., 1999, Facies character andstratal responses to accomodation to Pennsylvanianbioherms, western Orogrande basin, New Mexico: Journalof Sedimentary Research, v. 69, p. 893-908.Steiner, M. B. and Williams, T. E., 1968, Fusulinidae of theLaborcita Formation (Lower Permian), SacramentoMountains, New Mexico: Journal of Paleontology, v. 42, p.51-60.Thompson, M. L., 1954, American Wolfcampian fusulinaceans:University Kansas Paleontological Contributions, Protozoa,Article 5, p. 1-226.Wahlman, G. P., 1998, Fusulinid biostratigraphy of the newPennsylvanian-Permian boundary in the southwest and
Page 2: ContentsNotes from the SPS Secretar
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Page 11 and 12: A Recommendation: A desirable area
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