Microfossils from the Middle Proterozoic Dismal Lakes Groups, Arctic Canada

Awramik, 1972, Blue-green algal cell degradation and its implication for the fossil record (abstr.), Geol. Soc. Am. Abstr. with Progr., 4, 438 Baragar, 1973, Coppermine and Dismal Lakes Map-Areas, Geol. Surv. Can., Pap., 71-39, 20 Barghoorn, 1965, Microorganisms from the Gunflint chert, Science, 147, 563, 10.1126/science.147.3658.563 Cloud, 1969, Proterozoic eucaryotes from eastern California, 62, 623 Donaldson, 1975, Microfossils from the Dismal Lakes Group (Neohelikian), District of Mackenzie, Can. J. Earth Sci., 12, 371, 10.1139/e75-034 Francis, 1978, On the experimental silicification of microorganisms. II. On the time of appearance of eukaryotic organisms in the fossil record, Precambrian Res., 6, 65, 10.1016/0301-9268(78)90055-4 Golubic, 1976, Comparison of Holocene and mid-Precambrian Entophysalidaceae (Cyanophyta) in stromatolitic algal mats: cell division and degradation, J. Paleontol., 50, 1074 Hofmann, 1976, Precambrian microflora, Belcher Islands, Canada: Significance and systemmatics, J. Paleontol., 50, 1040 Horodyski, 1975, Recent calcareous stromatolites from Laguna Mormona (Baja California) Mexico, J. Sed. Pet., 45, 894 Horodyski, 1977, Laminated algal mats from a coastal lagoon, Laguna Mormona, Baja California, Mexico, J. Sed. Petrol., 47, 680 Irvine, 1970, Geologic age and structural relations of the Muskox Intrusion, Geol. Surv. Can., Rep. Activities, Pap. 70-1A, 149 Knoll, 1975, Precambrian eukaryotic organisms: a reassessment of the evidence, Science, 190, 52, 10.1126/science.190.4209.52 Lebedev, 1967 Licari, 1978, Biogeology of the late pre-Phanerozoic Beck Spring Dolomite of eastern California, J. Paleontol., 52, 767 Logan, 1974, Algal mats, cryptalgal fabrics, and structures, Hamelin Pool, Western Australia, Am. Assoc. Pet. Geol., Mem., 22, 140 Monty, 1967, Recent algal stromatolitic deposits, Andros Island, Bahamas, Ann. Soc. Geol. Belg., 90, 55 Muir, 1976, Proterozoic microfossils from the Amelia Dolomite, McArthur Basin, Northern Territory, Alcheringa, 1, 143, 10.1080/03115517608619066 Oehler, 1976, Transmission electron microscopy of organic microfossils from the Late Precambrian Bitter Springs Formation of Australia: techniques and survey of preserved ultrastructure, J. Paleontol., 50, 90 Oehler, 1977, Pyrenoid-like structures in Late Precambrian algae from the Bitter Springs Formation of Australia, J. Paleontol., 51, 885 Schopf, 1968, Microflora of the Bitter Springs Formation, Late Precambrian, central Australia, J. Paleontol., 42, 651 Schopf, 1974, The development and diversification of Precambrian life, Origins of Life, 5, 119, 10.1007/BF00927018 Schopf, 1975, Precambrian paleobiology: problems and perspectives, Ann. Rev. Earth and Planetary Sci., 3, 213, 10.1146/annurev.ea.03.050175.001241 Schopf, 1977, Biostratigraphic usefulness of stromatolitic Precambrian microbiotas: a preliminary analysis, Precambrian Res., 5, 143, 10.1016/0301-9268(77)90026-2 Schopf, 1971, New microorganisms from the Bitter Springs Formation (Late Precambrian) of the north-central Amadeus Basin, Australia, J. Paleontol., 45, 925 Schopf, 1974, Late Precambrian microfossils: discovery of four new stromatolitic microbiotas, Am. J. Bot., 61, 19 Schopf, 1976, How old are the eukaryotes?, Science, 193, 47, 10.1126/science.193.4247.47 Timofeev, 1974, Plant microfossils of the Proterozoic and lower Paleozoic of the U.S.S.R., 80 Thorpe, 1977, Sill of Western Channel Diabase, Port Radium, District of McKenzie, 4 Van Tuyl, 1918, The origin of chert, Am. J. Sci., 45, 449, 10.2475/ajs.s4-45.270.449 Vidal, 1976, Late Precambrian microfossils from the Visingso Beds in southern Sweden, Fossils and Strata, 9, 1 Walter, 1972, Stromatolites and the biostratigraphy of the Australian Precambrian and Cambrian, Spec. Pap. Palaeontol., 11, 256 Wanless, 1965, Age determinations and geological studies. Part 1 (Isotopic Ages, Rep. 5), Geol. Surv. Can., Pap., 64-17, 126