Eldon Hill (S4) No. 5 Spring section, lot 21, Lake Simcoe area: Caradoc, Canada
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Tetradium cellulosum
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Gastropoda
- Bellerophontida
- Sinuitidae
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Sinuites cancellatus
(Hall 1847)
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Gastropoda
- Murchisoniina
- Subulitidae
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Subulites sp.
Emmons 1842
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Gastropoda
- Murchisoniina
- Straparollinidae
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cf. Straparollina sp.
Billings 1865
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Gastropoda
- Murchisoniina
- Hormotomidae
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Hormotoma gracilis
(Hall 1847)
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Gastropoda
- Murchisoniina
- Murchisoniidae
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Hormotoma salteri
Ulrich and Scofield 1897
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| recombined as Cyrtostropha salteri | ||||||||||
| H. salteri canadensis | ||||||||||
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Bivalvia
- Modiomorphida
- Modiomorphidae
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Modiolopsis concava
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Bivalvia
- Cyrtodontida
- Cyrtodontidae
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Whitella cf. truncata
Ulrich 1890
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| recombined as Cyrtodontula truncata | ||||||||||
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Lingulata
- Lingulida
- Lingulidae
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Lingula sp.
Bruguiére 1797
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Rhynchonellata
- Rhynchonellida
- Rhynchotrematidae
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Rhynchotrema intermedia
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Rhynchotrema increbescens
(Hall 1847)
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Rhynchonellata
- Atrypida
- Anazygidae
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Zygospira deflecta
(Hall 1847)
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Zygospira recurvirostris
(Hall 1847)
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| recombined as Anazyga recurvirostra | ||||||||||
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Rhynchonellata
- Orthida
- Dalmanellidae
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Paucicrura rogata
(Sardeson 1892)
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Strophomenata
- Strophomenida
- Strophomenidae
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Opikina rugosa
(Wilson 1921)
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Strophomenata
- Strophomenida
- Rafinesquinidae
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Rafinesquina cf. carlottina
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Rafinesquina esmondensis
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| R. esmondensis borealis | ||||||||||
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Rafinesquina cf. orleansensis
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Rafinesquina cf. patula
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Rafinesquina trentonensis
(Hall 1847)
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Rafinesquina alternata
(Conrad 1838)
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| R. alternata intermedia and R. alternata plana | ||||||||||
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= Rafinesquina intermedia
Wilson 1944
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Wilson 1946 | |||||||||
| original and current combination Rafinesquina alternata intermedia | ||||||||||
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Strophomenata
- Strophomenida
- Sowerbyellidae
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Sowerbyella sericea
(Sowerby 1839)
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| recombined as Sowerbyella (Sowerbyella) sericea | ||||||||||
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Sowerbyella cf. curdsvillensis
(Foerste 1912)
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Sowerbyella cf. punctostriata
(Mather 1917)
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| synonym of Sowerbyella curdsvillensis | ||||||||||
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Stenolaemata
- Trepostomata
- Aisenvergiidae
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Eridotrypa aedilis
Eichwald 1855
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Stenolaemata
- Trepostomata
- Heterotrypidae
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Dekayella cf. trentonensis
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Stenolaemata
- Trepostomata
- Halloporidae
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Dianulites sp.
Eichwald 1829
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Hallopora ampla
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Stenolaemata
- Trepostomida
- Monticuliporidae
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Prasoporina selwyni
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Trilobita
- Asaphida
- Asaphidae
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Isotelus sp.
Dekay 1824
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Trilobita
- Phacopida
- Pterygometopidae
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Calyptaulax sp.
Cooper 1930
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| see common names | ||||||||||
Geography
| Country: | Canada | State/province: | Ontario |
| Coordinates: | 44.5° North, 79.0° West (view map) | ||
| Paleocoordinates: | 24.9° South, 55.0° West | ||
| Basis of coordinate: | estimated from map | ||
| Geographic resolution: | outcrop |
Time
| Period: | Ordovician | Epoch: | Late/Upper Ordovician |
| 10 m.y. bin: | Ordovician 4-5 | ||
| *Period: | Middle Ordovician | *Epoch: | Caradocian | *Local age/stage: | Trentonian |
| Key time interval: | Caradoc | ||
| Age range of interval: | 458.40000 - 449.60000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Lithology and environment
| Primary lithology: | gray "limestone" |
| Secondary lithology: | argillaceous "limestone" |
| Includes fossils? | Y |
| Includes fossils? | Y |
| Lithology description: "[B]rownish grey and grey, fine- to coarse-crystalline, bioclastic, crinoidal limestone in beds an inch to 3 inches thick, together with minor amounts of argillaceous limestone and granular fragmental limestone. The strata locally weather grey and brown into beds 8 to 10 inches thick. A peculiar weathering phenomenon, involving a thin, regular, discoidal sheeting effect, oblique to individual beds, and cutting across them, is characteristic and is considered to be crossbedding. On the uppermost surface and visible at only two localities within the map-area, are large ripple-like structures, as much as 30 inches in wave length and 6 inches in amplitude. They are considered to be para-ripples modified by glacial scour action." | |
| Environment: | deep subtidal indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | biostratigraphic analysis |
Metadata
| Database number: | 26275 | ||
| Authorizer: | S. Holland, P. Wagner | Enterer: | T. Hanson, P. Wagner |
| Modifier: | P. Wagner | Research group: | marine invertebrate |
| Created: | 2002-10-10 21:26:46 | Last modified: | 2024-03-31 19:20:47 |
| Access level: | the public | Released: | 2002-10-10 21:26:46 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 7251. | B. A. Liberty. 1969. Palaeozoic geology of the Lake Simcoe Area, Ontario. Geological Survey of Canada Memoirs (355)1-201 [S. Holland/T. Hanson/T. Hanson] |
Secondary references:
| 62157 | A. E. Wilson. 1946. Brachiopoda of the Ottawa Formation of the Ottawa - St. Lawrence Lowland. Geological Survey of Canada Bulletin 8:1-149 [P. Wagner/P. Wagner] |