Skip to main content Accessibility help
×
Home

Latest Early Cambrian small shelly fossils, trilobites, and Hatch Hill dysaerobic interval on the Québec continental slope

  • Ed Landing (a1), Gerd Geyer (a2) and Kenneth E. Bartowski (a1)

Abstract

Latest Early Cambrian continental slope deposition of the early Hatch Hill dysaerobic interval (new name, latest Early Cambrian—earliest Ordovician) is recorded by dark grey shales and turbidite limestones in the Bacchus slice at Ville Guay, Québec. Platform-derived microfaunas of the Bicella bicensis trilobite assemblage were transported into a dysoxic environment of the upper “Anse Maranda Formation,” and many organisms were buried alive. Phosphatization preserved a diverse skeletal fossil assemblage that includes four agnostid trilobites, echinoderm debris, and twenty small shelly fossil taxa. The latter include five helcionellids; Pelagiella Matthew, 1895b, classified herein as a gastropod; a bivalve (Fordilla Barrande, 1881); the brachiopod Linnarssonia taconica Walcott, 1887; two conodontomorphs; four hyoliths; and such phosphatic and calcareous problematica as Coleoloides Walcott, 1889, emend. Most small shelly fossil taxa, including Discinella micans Billings, 1872, range through much of the Olenellus Zone and Elliptocephala asaphoides assemblage interval. Trilobites allow a more resolved correlation into the uppermost Olenellus Zone. A comparable stratigraphy occurs in Cambrian—Ordovician slope facies of the Bacchus slice and the Giddings Brook slice in eastern New York. The “Anse Maranda Formation” correlates with the West Granville—Browns Pond—lower Hatch Hill formations in eastern New York and brackets two dysaerobic intervals (Browns Pond and early Hatch Hill). Sea-level change associated with the Hawke Bay regression between the Browns Pond and Hatch Hill onlap/dysaerobic intervals led to the longest period of oxygenated green shale and sandstone deposition on the east Laurentian slope in the late Early Cambrian-earliest Ordovician.

Copyright

References

Hide All
Baird, G. C., and Brett, C. E. 1986. Erosion on an anaerobic sea floor: significance of reworked pyrite deposits from the Devonian of New York State. Palaeogeography, Palaeoclimatology, Palaeoecology, 57:157193.
Barrande, J. 1881. Systéme Silurien du centre de la Bohême, Volume 6, Acéphales. Paris and Prague, 342 p.
Bengtson, S., and Fletcher, T. P. 1983. The oldest sequence of skeletal fossils in the Lower Cambrian of southeastern Newfoundland. Canadian Journal of Earth Sciences, 20:525536.
Bengtson, S., Conway Morris, S., Cooper, B. J., Jell, P. A., and Runnegar, B. N. 1990. Early Cambrian fossils from South Australia. Association of Australasian Palaeontologists, Memoir 9.
Billings, E. 1872. On some new species of Palaeozoic fossils. American Journal of Science, 3:352360.
Bird, J. M., and Rasetti, F. 1968. Lower, Middle, and Upper Cambrian faunas in the Taconic sequence of eastern New York: stratigraphic and biostratigraphic significance. Geological Society of America, Special Paper, 113, 66 p.
Bourne, G. C. 1910. On the anatomy and systematic position of Incisura (Scissurella) lyttletonensis . Quarterly Journal of Microscopic Sciences, 55:147.
Brasier, M. D. 1984. Microfossils and small shelly fossils from the Lower Cambrian Hyolithes Limestone at Nuneaton, English Midlands. Geological Magazine, 121:229253.
Brasier, M. D., and Hewitt, R. A. 1979. Environmental setting of fossiliferous rocks from the uppermost Proterozoic–Lower Cambrian of central England. Palaeogeography, Palaeoclimatology, Palaeoecology, 27:3557.
Brett, C. E., Dick, V. B., and Baird, G. C. 1991. Comparative taphonomy and paleoecology of Middle Devonian dark gray and black shale facies from western New York, p. 536. In Landing, E. and Brett, C. E. (eds.), Dynamic Stratigraphy and Depositional Environments of the Hamilton Group (Middle Devonian) in New York State. Pt. II. New York State Museum Bulletin, 469.
Crofts, D. R. 1955. Muscle morphogenesis in primitive gastropods and its relation to torsion. Proceedings of the Zoological Society of London, 125:711750.
Cuvier, G. 1797. Tableau élementaire de l'historie naturelle des animaux. Paris, 710 p.
Duméril, A. M. C. 1806. Zoologie analytique ou méthode naturelle de classification des animaux. Allais, Paris, 336 p.
Ells, R. W. 1889. Second report on the geology of a portion of the province of Quebec. Geological Survey of Canada, Annual Report, 3(2):1120.
Fisher, D. W. 1984. Bedrock geology of the Glens Falls–Whitehall region, New York. New York State Museum, Map and Chart Series, 35.
Ford, S. W. 1873. On some new species of fossils from the Primordial or Potsdam Group of Rensselaer County, New York. American Journal of Science, Third Series, 5:211215.
Geyer, G. 1994. Middle Cambrian mollusks from Idaho and early conchiferan evolution, p. 6986. In Landing, E. (ed.), Studies in Stratigraphy and Paleontology in Honor of Donald W. Fisher. New York State Museum Bulletin, 481.
Goryansky, V. J., and Popov, L. 1985. Morfologiya, sistematicheskoe polozhenie I proiskhozdenie bezzamkovykh brakhiopod s karbonatnoy rakovinoy. Paleontologicheskiy Zhurnal', 1985(3):314.
Grabau, A. W. 1900. Palaeontology of the Cambrian terranes of the Boston Basin. Occasional Papers of the Boston Society of Natural History, 4:601694.
Graham, A. 1985. Evolution within the Gastropoda: Prosobranchia, p. 151186. In Trueman, E. R. and Clarke, M. R. (eds.), The Mollusca, Volume 10, Evolution. Academic Press, Inc., New York.
Hall, J. 1847. Palaeontology of New York, Volume 1, Containing descriptions of the remains of the lower division of the New York Syatem. C. Van Benthuysen, Albany, 338 p.
Hall, J. 1865. Graptolites of the Quebec Group. Figures and descriptions of Canadian organic remains. Canadian Geological Survey, 151 p.
Hartt, F. 1868. Fossils of the Primordial or Acadian Group at St. John, p. 641657. In Dawson, J. W. (ed.), Acadian Geology. The Geological Structure, Organic Remains, and Mineral Resources of Nova Scotia, etc. (second edition). London.
Hedley, C. 1904. Additions to the marine molluscan fauna of New Zealand. Records of the Australian Museum, 5:75105.
Hu, C. H. 1971. Ontogeny and sexual dimorphism of Lower Cambrian Trilobita. Paleontographica Americana 7(44), 155 p.
Jell, P. A. 1975. Australian Middle Cambrian eodiscids with a review of the superfamily. Palaeontographica, Abteilung A, 150, 95 p.
Knight, J. B. 1952. Primitive fossil gastropods and their bearing on gastropod classification. Smithsonian Miscellaneous Collections 117, Number 13.
Knight, J. B. 1956. New families of gastropods. Journal of the Washington Academy of Sciences, 46(2):41, 42.
Kobayashi, T. 1939. On the agnostids (Pt. 1). Journal of the Faculty of Science, Imperial University of Tokyo, Section II, Geology, Mineralogy, Geography, Seismology, 5 (5):69198.
Kuhn, O. 1949. Lehrbuch der Paläozoologie. Schweizerbarth, Stuttgart, 326 p.
Landing, E. 1976. Early and Middle Cambrian conodonts from the Taconic allochthon, eastern New York. Journal of Paleontology, 48:12411248.
Landing, E. 1984. Skeleton of lapworthellids and the suprageneric classification of lapworthellids (Early and Middle Cambrian phosphatic problematica). Journal of Paleontology, 58:13801398.
Landing, E. 1991. Upper Precambrian through Lower Cambrian of Cape Breton Island: faunas, paleoenvironments, and stratigraphic revision. Journal of Paleontology, 65:570595.
Landing, E. 1993a. Cambrian–Ordovician boundary in the Taconic allochthon, eastern New York. Journal of Paleontology, 67:119.
Landing, E. 1993b. In situ earliest Cambrian tube worms and the oldest metazoan-constructed biostrome (Placentian Series, southeastern Newfoundland). Journal of Paleontology, 67:333342.
Landing, E. 1995. Upper Placentian–Branchian Series of mainland Nova Scotia (middle–upper Lower Cambrian): faunas, paleoenvironments and stratigraphic revision. Journal of Paleontology, 69:475495.
Landing, E., and Bartowski, K. E. 1996. Oldest shelly fossils from the Taconic allochthon and late Early Cambrian sea-levels in eastern Laurentia. Journal of Paleontology, 70:741751.
Landing, E., and Benus, A. P. 1988. Cambrian depositional history and stratigraphy, Avalon-Bonavista region, southeastern Newfoundland. Geological Association of Canada/Mineralogical Association of Canada/Canadian Society of Petroleum Geologists Field Trip Guidebook, Trip A3. Geological Association of Canadam Newfoundland Section, St. John's.
Landing, E., and Ludvigsen, R. 1984. Classification and conodont-based age of the Ordovician trilobite Ellsaspis (middle Arenigian, Ville Guay, Quebec). Canadian Journal of Earth Sciences, 21:14831490.
Landing, E., and Murphy, J. B. 1991. Uppermost Precambrian-Lower Cambrian of mainland Nova Scotia: faunas, depositional environments, and stratigraphic revision. Journal of Paleontology, 65:382396.
Landing, E., and Westrop, S. R. 1999. Paleoecology of the Cambrian radiation: evidence from the Avalon continent. Geological Society of America, Abstracts with Programs, 35(1):325.
Landing, E., von Bitter, P. H., Benus, A. P., and Albanese, J. R. 1984. Oldest “tube worm”-algal mud mound associations (Lower Cambrian, eastern Newfoundland). Geological Society of America, Abstracts with Programs, 16:45.
Landing, E., Myrow, P., Benus, A. P., and Narbonne, G. M. 1989. The Placentian Series: appearance of the oldest skeletalized faunas in southeastern Newfoundland. Journal of Paleontology, 63:739769.
Landing, E., Benus, A. P., and Whitney, P. R. 1992. Early and early Middle Ordovician continental slope deposition: shale cycles and sandstones in the New York Promontory and Quebec Reentrant region. New York State Museum Bulletin, 474, 40 p.
Lebel, D., and Hubert, C. 1995. Géologie de la région de Saint-Raphael (Chaudière–Appalaches). Ministère des Resources Naturelles, Québec, ET-93–02.
Lebel, D., and Kirkwood, D. 1998. Nappes and mélanges in the Québec–Bellechasse area: their regional tectonic and stratigraphic significance in the Humber Zone. Geological Association of Canada/Mineralogical Association of Canada, Field Trip A5 Guidebook, 15–17 May 1998.
Linnaeus, C. 1758. Systema naturae, Animalia, per regna tria naturae, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis (10th edition). L. Salvii, Holmiae, 1(6), 3,690 p.
Linsley, R. M. 1977. Some “laws” of gastropod shell form. Paleobiology 3:196206.
Linsley, R. M., and Kier, W. M. 1984. The Paragastropoda: a proposal of a new class of Paleozoic Mollusca. Malacologia, 25:241254.
Lochman, C. 1956. Stratigraphy, paleontology, and paleogeography of the Elliptocephala asaphoides strata in Cambridge and Hoosick quadrangles, New York. Geological Society of America Bulletin, 67:13311396.
Luo, H., Jiang, Z., Wu, X., Song, X., Ouyang, L., Xing, Y., Liu, G., Zhang, S., and Tao, Y. 1984. Sinian–Cambrian Boundary Stratotype Section at Meishucun, Jinning, Yunnan, China. People's Publishing House, Yunnan, 154 p.
Matthew, G. F. 1895a. Illustrations of the fauna of the St. John Group, No. VIII. Transactions of the Royal Society of Canada, 11(4):85129.
Matthew, G. F. 1895b. The Protolenus fauna. Transactions of the New York Academy of Sciences, 14:101153.
Milne Edwards, H. 1848. Note sur la classification naturelle des mollusques gastéropodes. Annals des Sciences naturelles, Zoologie, Series 3, 9:102112.
Missarzhevsky, V. V. 1973. Conodont-shaped organisms from the Precambrian and Cambrian boundary strata of the Siberian Platform and Kazakhstan, p. 5357. In Zhuravleva, I. T. (ed.), Problems of the Paleontology and Biostratigraphy of the Lower Cambrian of Siberia and the Far East. Nauka, Novosibirsk. (In Russian).
Missarzhevsky, V. V. 1974. New data on the oldest Early Cambrian fossils of the Siberian Platform, p. 179189. In Zhuravleva, I. T. and Yu Rozanov, A. (eds.), Biostratigraphy and Plaeontology of the Lower Cambrian of Europe and Northeast Asia. Nauka, Moscow.
Missarzhevsky, V. V. 1977. Conodonts(?) and Cambrian phosphatic problematica from Mongolia and Siberia, p. 1019. In I Voronin, Yu. (ed.), Paleozoic Invertebrates of Mongolia. Transactions of the Joint Soviet-Mongolian Paleontological Expedition 1977, 246 p.
Missarzhevsky, V. V., and Mambetov, A. M. 1981. Stratigraphy and fauna of Cambrian and Precambrian boundary beds of Maly Karatau. Trudy Geologisshe Institut, Akademi Nauk SSSR, 326, 92 p. (In Russian).
Müller, K. J., and Miller, J. F. 1976. The problematic microfossil Utahphospha from the Upper Cambrian of the western United States. Lethaia, 9:391395.
North American Commission on Stratigraphic Nomenclature. 1983. North American Stratigraphic Code. American Association of Petroleum Geologists Bulletin, 67:841875.
Nowlan, G. S., Narbonne, G. M., and Fritz, W. H. 1985. Small shelly fossils and trace fossils near the Precambrian–Cambrian boundary in the Yukon Territory, Canada. Lethaia, 18:233256.
Palmer, A. R. 1971. The Cambrian of the Appalachian and eastern New York regions, eastern United States, p. 169217. In Holand, C. H. (ed.), Cambrian of the New World. Wiley-Interscience, New York.
Palmer, A. R., and James, N. P. 1979. The Hawke Bay event: a circum-Iapetus regression near the Lower–Middle Cambrian boundary, p. 1518. In Wones, D. R. (ed.), The Caledonides in the U.S.A., Proceedings. Virginia Polytechnic Institute and State University, Department of Geology, Memoir 2.
Palmer, A. R., and Repina, L. N. 1993. Through a glass darkly: taxonomy, phylogeny, and biostratigraphy of the Olenellina. The University of Kansas Paleontological Contributions, New Series, No. 3.
Peel, J. S. 1987. Yochelcionella americana (Mollusca) from the Lower Cambrian of Newfoundland. Canadian Journal of Earth Sciences, 24:23282330.
Peel, J. S. 1991. Functional morphology of the Class Helcionelloida nov., and the early evolution of the Mollusca, p. 157177. In Simonetta, A. and Conway Morris, S. (eds.), The Early Evolution of Metazoa and the Significance of Problematic Taxa. Proceedings of an International Symposium Held at the University of Camerino 27–31 March 1989. Universita degli Studi di Camerino, Dipartimento di Biologia Molecolare, Cellulare e Animale. Camerino.
Peel, J. S., and Blaker, M. R. 1988. The small shelly fossil Mongolitubulus from the Lower Cambrian of central North Greenland. Rapport Groenlands Geologisk Undersoekrting, 137:5560.
Pokrovskaya, N. V. 1960. Otryad Miomera, p. 5461. In Chernysheva, N. E. (ed.), Osnovy Paleontologii, Chlenistonogie, Trolibitoobraznye I Rakoobraznye. Gosudarstvennoe Nauchno-Tekhnicheskoe Izdatel'stvo, Moscow.
Popov, L., and Holmer, L. E. 1994. Cambrian–Ordovician lingulate brachiopods from Scandinavia, Kazakhstan, and south Ural Mountains. Fossils & Strata, 35, 153 p.
Poulsen, C. 1967. Fossils from the Lower Cambrian of Bornholm. Kongelige Danske Videnskabernes Selskab Matematisk-fysiske Meddelelser, 36(2):148.
Qian, Y., and Bengtson, S. 1989. Palaeontology and biostratigraphy of the Early Cambrian Meishucunian Stage in Yunnan Province, south China. Fossils and Strata, Number 24, 156 p.
Rasetti, F. 1945a. Faunes cambriennes des conglomérates de la “Formation de Sillery.” Le Naturaliste Canadien, 72:5367.
Rasetti, F. 1945b. Fossiliferous horizons in the “Silllery Formation” near Lévis, Quebec. American Journal of Science, 243:305319.
Rasetti, F. 1946. Cambrian and Early Ordovician stratigraphy of the Lower St. Lawrence valley. Geological Society of America, Bulletin, 57:687706.
Rasetti, F. 1948a. Lower Cambrian trilobites from the conglomerates of Quebec (exclusive of the Ptychopariidea). Journal of Paleontology, 22:124.
Rasetti, F. 1948b. Middle Cambrian trilobites from the conglomerates of Quebec. Journal of Paleontology, 22:315339.
Rasetti, F. 1955. Lower Cambrian ptychopariid trilobites from the conglomerates of Quebec. Smithsonian Miscellaneous Collections, 128(7).
Rasetti, F. 1963. Middle Cambrian ptychoparioid trilobites from the conglomerates of Quebec. Journal of Paleontology, 37:575594.
Rasetti, F. 1967. Lower and Middle Cambrian trilobite faunas from the Taconic sequence of New York. Smithsonian Miscellaneous Collections, 152(4).
Rasetti, F., and Theokritoff, G. 1967. Lower Cambrian agnostoid trilobites of North America. Journal of Paleontology, 41:189196.
Raymond, P. E. 1913. On the genera of the Eodiscidae. The Ottawa Naturalist, 27:101106.
Repetski, J. E. 1981. An Ordovician occurrence of Utahphospha Müller and Miller. Journal of Paleontology, 55:395400.
Resser, C. E. 1938. Cambrian System (restricted) of the southern Appalachians. Geological Society of America, Special Papers, Number 15.
Riva, J. 1972. Geology of the environs of Quebec City. 24th International Geological Congress, Montreal, P. Q., Excursion B-19.
Roark, R. J. 1965. Formular for Stress and Strain. McGraw Hill, New York, 435 p.
Robison, R. A. 1976. Middle Cambrian trilobite biostratigraphy of the Great Basin, p. 93109. In Robison, R. A. and Rowell, A. J. (eds.), Paleontology and Depositional Environments: Cambrian of Western North America. Brigham Young University Geology Studies, 23.
Rodgers, J. 1968. The eastern edge of the North American continent during the Cambrian and Early Ordovician, p. 141150. In Zen, E., White, W. S., and Hadley, J. B. (eds.), Studies of Appalachian Geology: northern and Maritime. Interscience Publishers, New York.
Rominger, C. L. 1887. Description of Primordial fossils from Mt. Stephens, N. W. Territory of Canada. Philadelphia Academy of Natural Sciences, Proceedings for 1887, p. 1219.
Rowell, A. J. 1965. Inarticulate, p. H260H296. In Moore, R. C. (ed.), Treatise on Invertebrate Paleontology, Pt. H, Brachiopoda. Volume 1. Geological Society of America and University of Kansas Press, Lawrence, 521 p.
Rowell, A. J. 1966. Revision of some Cambrian and Ordovician inarticulate brachiopods. The University of Kansas Paleontological Contributions, 7, 36 p.
Rozanov, A. Yu., and Zhuravlev, A. Yu. 1992. The Lower Cambrian fossil record of the Soviet Union, p. 205282. In Lipps, J. H. and Signor, P. W. (eds.), Origin and Early Evolution of the Metazoans. Plenun Press, New York.
Rozanov, A. Yu., Missarzhevsky, V. V., Val'kova, N. A., Krylov, I. N., Keller, B. M., Korolyuk, I. K., Lendzion, K., Michniak, R., Pykova, N. G., and Sidarov, A. D. 1969. Tommotian Stage and the Cambrian Lower Boundary Problem. Akademia Nauk SSSR, Ordena Trudovogo Krasnogo Znumeni Geologichesky Institut, 206, “Nauka,” Moscow, 359 p.
Runnegar, B. 1981. Muscle scars, shell form and torsion in Cambrian and Ordovician molluscs. Lethaia, 14:311322.
Runnegar, B., and Jell, P. A. 1976. Australian Middle Cambrian molluscs and their bearing on early molluscan evolution. Alcheringa, 1:109138.
Runnegar, B., and Pojeta, J. Jr. 1980. The monoplacophoran mollusk Yochelcionella identified from the Lower Cambrian of Pennsylvania. Journal of Paleontology, 54:635636.
Runnegar, B., and Pojeta, J. Jr. 1985. Origin and diversification of the Mollusca, p. 157. In Trueman, E. R. and Clarke, M. R. (eds.), The Mollusca, Volume 10, Evolution. Academic Press, New York.
Sageman, B. B., Wignall, P. B., and Kauffman, E. G. 1991. Biofacies models for oxygen-deficient facies in epicontinental seas: tool for paleoenvironmental analysis, p. 542564. In Einsele, G., Ricken, W., and Seilacher, A. (eds.), Cycles and Environments in Stratigraphy, Springer-Verlag, New York.
Salter, J. W. 1864. A monograph of British trilobites, Pt. 1, Palaeontological Society, Monograph Volume for 1862, 80 p.
Schindewolf, O. H. 1938. Handbuck der Paläontologie, Teil 1. Gebrüder Boorntrager, Berlin, 540 p.
Schuchert, C. 1893. A classification of the Brachiopoda. American Geologist, 11:141167.
Shaw, A. 1954. Lower and lower Middle Cambrian faunal succession in northwestern Vermont. Geological Society of America Bulletin, 65:10331046.
Shaw, A. 1958. Stratigraphy and structure of the St. Albans area, northwestern Vermont. Geological Society of America Bulletin, 69:519567.
Speyer, S. E. 1987. Comparative taphonomy and paleoecology of trilobite Lagerstatten. Alcheringa, 11:205232.
Speyer, S. E., and Brett, C. E. 1986. Trilobite taphonomy and Middle Devonian taphofacies. Palaios, 1:312327.
Theokritoff, G. 1968. Cambrian biogeography and biostratigraphy in New England, p. In Zen, E., White, W. S., and Hadley, J. B. (eds.), Studies of Appalachian Geology: Northern and Maritime. Interscience Publishers, New York.
Thiele, J. 1925. Mollusca = Weichtiere. Handbuch der Zoologie, 5:15258.
Val'kov, A. K. 1982. Lower Cambrian biostratigraphy of the eastern Siberian Platform (Ochorno–Maysky District). Izdatel'stvo “Nauka,” Moscow, 91 p. (In Russian).
von Siebold, C. T. E., and Stannius, H. 1845. Lehrbuch der Vergleichenden Anatomie, 1. Abteilung. Wirbellose Thiere, Berlin, 670 p.
Walch, J. E. I. 1771. Die Naturgeschichte der versteinerungen zur Erläuterung der Knorrrischen Sammlung von Merkwürdigkeiten der Natur. Nürnburg.
Walcott, C. D. 1885. Palaeontologic notes. American Journal of Science, Series 3, 29:114117.
Walcott, C. D. 1887. Fauna of the “Upper Taconic” of Emmons, in Washington County, New York. American Journal of Science, 3rd Series, 34:187199.
Walcott, C. D. 1889. Description of new genera and species from the Lower Cambrian or Olenellus Zone of North America. Proceedings of the United States National Museum, 12:3346.
Walcott, C. D. 1890. The fauna of the Lower Cambrian or Olenellus Zone. United States Geological Survey, Tenth Annual Report, 1888–1889, p. 511774.
Walcott, C.D. 1912. Cambrian Brachiopoda. United States Geological Survey, Monograph 60.
Walcott, C. D. 1916. Cambrian geology and paleontology, III, No. 3. Cambrian trilobites. Smithsonian Miscellaneous Collections, 64:157258.
Williams, H. 1978. Tectonic lithofacies map of the Appalachian orogen. Memorial University of Newfoundland, Map 1.
Wrona, R. 1982. Early Cambrian phosphatic microfossils from southern Spitzbergen (Hornhund region). Palaeontologica Polonica, 43:916.
Wrona, R. 1987. Cambrian microfossil Hadimopanella Gedik from glacial erratics in west Antarctica. Palaeontologica Polonica, 49:3748.
Yochelson, E. L. 1968. Tremadocian mollusks from the Nochixlán region, Oaxaca, Mexico. Journal of Paleontology, 42:801803.
Yochelson, E. L. 1978. An alternative approach to the interpretation of the phylogeny of ancient mollusks. Malacologia, 17:165191.
Zhuravlev, A. U. 1995. Preliminary suggestions on the global Early Cambrian zonation, p. 147160. In Geyer, G. and Landing, E. (eds.), Morocco '95: The Lower–Middle Cambrian Standard of Western Gondwana. Beringeria Special Issue 2, 269 p.

Related content

Powered by UNSILO

Latest Early Cambrian small shelly fossils, trilobites, and Hatch Hill dysaerobic interval on the Québec continental slope

  • Ed Landing (a1), Gerd Geyer (a2) and Kenneth E. Bartowski (a1)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed.