The Late Ordovician Epoch was marked by although the presence of the distinctive receptaculitid one of the two greatest sea-level rises and floodings of algae and the giant gastropod Maclurites had been used the North American paleocontinent in Phanerozoic by pioneer workers to date Ordovician rocks in the time, accompanied by rapid diversification of inverte- area. [...] During the Devonian and Mississippian peri- Late Ordovician erosion has removed the deposits ods, the Williston Basin became part of the giant Elk from the northeastern part of the basin (i.e., north- Point Basin, stretching from the southern Northwest central Saskatchewan and much of western Manitoba). [...] Toward the lar to the Gunn Member in lithology and fossil content, centre of the basin, in southern Saskatchewan (Well 7- except that it is dolomitized and usually weathers yel- 28-4-4W2), the equivalent of the Selkirk Member is the lowish tan in colour. [...] Bioturbation and relatively The Fort Garry Member at the top of the Red River well-preserved burrows are common in both the Gunn Formation consists of approximately 35 m of thickly and the Penitentiary members. [...] As the youngest con- (1976) interpreted the T-marker and other similar odonts from the beds immediately below the marker beds in the Upper Ordovician – Lower Silurian Ordovician–Silurian boundary in the Stonewall succession of the Williston Basin as basal lag deposits, Formation are probably of late Richmondian age denoting the beginning of depositional (transgressive) (Nowlan and Haidl 1999), the
Authors
- Bibliography, etc. Note
- Includes bibliographical references (p. 57-65)
- Control Number Identifier
- CaOOCEL
- Dewey Decimal Classification Number
- 564/.68/097127
- General Note
- A publication of the National Research Council of Canada Monograph Publishing Program NRC no. 44455"--T.p. verso Issued as part of the desLibris books collection
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- n-cn-mb
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- 9781459303393 0660182831
- LCCN
- QE796 COP.CA.2.2001-1576eb
- LCCN Item number
- J565 2000eb
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- CaBNVSL
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- 1 electronic text (viii, 117 p.)
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- (CaBNVSL)jme00313450 (OCoLC)70769480 (CaOOCEL)404760
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Table of Contents
- Cover page 1
- Publishing information 2
- Title page 3
- Copyright 4
- Contents 5
- Abstract 7
- Résumé 7
- Acknowledgements 8
- Introduction 9
- Geological setting 10
- Biostratigraphy 15
- Paleoecology 17
- The Kjaerina hartae Community 17
- The Diceromyonia storeya Community 19
- Paleobiogeography 21
- Systematic Paleontology 24
- Order Orthida Schuchert and Cooper, 1932 24
- Superfamily Orthoidea Woodward, 1852 24
- Family Plaesiomyidae Schuchert, 1913 24
- Genus Dinorthis Hall and Clarke, 1982 24
- Dinorthis occidentalis (Okulitch, 1943) 25
- Family Plectorthidae Schuchert and LeVene, 1929 28
- Genus Gnamptorhynchos Jin, 1989 28
- Gnamptorhynchos manitobensis Jin and Zhan, 2000 28
- Superfamily Dalmanelloidea Schuchert, 1913 30
- Family Platyorthidae Harper, Boucot, and Walmsley, 1969 30
- Genus Diceromyonia Wang, 1949 30
- Diceromyonia storeya (Okulitch, 1943) 31
- Order Strophomenida Öpik, 1934 33
- Superfamily Plectambonitoidea Jones, 1928 33
- Family Sowerbyellidae Öpik, 1930 33
- Genus Thaerodonta Wang, 1949 33
- Thaerodonta clarksvillensis (Foerste, 1912) 34
- Superfamily Strophomenoidea King, 1846 35
- Family Strophomenidae King, 1846 35
- Genus Strophomena Rafinesque in de Blainville, 1824 35
- Strophomena planumbona (Hall, 1847) 36
- Strophomena vetusta James, 1874 37
- Genus Nasutimena n. gen. 38
- Nasutimena fluctuosa (Billings, 1860) 39
- Nasutimena undulosa (Roy, 1941) 42
- Genus Holtedahlina Foerste, 1924 42
- Holtedahlina paraprostrata n. sp. 43
- Genus Tetraphalerella Wang, 1949 44
- Tetraphalerella neglecta (James, 1881) 44
- Tetraphalerella churchillensis Jin, Caldwell, and Norford, 1997 45
- Family Rafinesquinidae Schuchert, 1893 45
- Genus Kjaerina Bancroft, 1929 45
- Kjaerina hartae Jin, Caldwell, and Norford, 1995 46
- Genus Megamyonia Wang, 1949 46
- Megamyonia nitens (Billings, 1860) 46
- Family Oepikinidae Sokolskaya, 1960 49
- Genus Oepikina Salmon, 1942 49
- Oepikina lata (Whiteaves, 1896) 49
- Oepikina limbrata Wang, 1949 49
- Order Pentamerida Schuchert and Cooper, 1931 51
- Superfamily Porambonitoidea Davidson, 1853 51
- Family Parastrophinidae Ulrich and Cooper, 1938 51
- Genus Parastrophinella Schuchert and Cooper, 1931 51
- Parastrophinella cirrita n. sp. 51
- Order Rhynchonellida Kuhn, 1949 53
- Superfamily Rhynchonelloidea Gray, 1848 53
- Family Rhynchotrematidae Schuchert, 1913 53
- Genus Rhynchotrema Hall, 1860 53
- Rhynchotrema increbescens (Hall, 1847) 53
- Rhynchotrema iowense Wang, 1949 54
- Genus Lepidocyclus Wang, 1949 55
- Lepidocyclus laddi Wang, 1949 55
- Genus Hypsiptycha Wang, 1949 56
- Hypsiptycha anticostiensis (Billings, 1862) 56
- Hypsiptycha occidens (Wilson, 1926) 58
- Genus Hiscobeccus Amsden, 1983 60
- Hiscobeccus capax (Conrad, 1842) 60
- Hiscobeccus gigas (Wang, 1949) 62
- References 65
- Appendix A: Ashgill brachiopod faunal data for paleobiographic analysis 74
- Appendix B: Locality data 77
- 1. GSC localities 77
- 2. Manitoba Museum of Man and Nature (MMMN) collections 77
- Plates 1–23 80
- Plate 1 80
- Plate 2 82
- Plate 3 84
- Plate 4 86
- Plate 5 88
- Plate 6 90
- Plate 7 92
- Plate 8 94
- Plate 9 96
- Plate 10 98
- Plate 11 100
- Plate 12 102
- Plate 13 104
- Plate 14 106
- Plate 15 108
- Plate 16 110
- Plate 17 112
- Plate 18 114
- Plate 19 116
- Plate 20 118
- Plate 21 120
- Plate 22 122
- Plate 23 124