Battery Point Formation
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| Battery Point Formation | |
|---|---|
| Stratigraphic range: Early Emsian-Early Eifelian | |
 Sawdonia ornata fossil from the Battery Point Formation | |
| Type | Geological formation |
| Unit of | Gaspé Sandstones |
| Underlies | Malbaie Formation |
| Overlies | York River Formation |
| Thickness | 2,300 m (7,550) ft |
| Location | |
| Region | Quebec |
| Country | Canada |
The Battery Point Formation is a geologic formation in Quebec. It preserves fossils dating back to the early Emsian to early Eifelian the lower Devonian period.[1]
Description
[edit | edit source]A part of the Gaspé Sandstones,[2] the Battery Point Formation is believed to have been deposited in a fluvial environment based on the presence of rootlets as well as the abundance of trough and planar-tabular cross bedding, and the lower part resembles modern braided systems more than meandering systems.[2][3] It rests unconformably on the shallow marine sandstones of the York River Formation (the basal unit of the Gaspé Sandstones and making the Battery Point Formation the first continental unit of the sequence[2]), transitioning upwards into the Malbaie Formation, and is 2,300 meters (7,550 feet) thick.[4]
Fossil content
[edit | edit source]Limited intervals in the lower part of the formation contain remains of a few brachiopods and bivalves, though marine fauna is not known from other parts of the formation.[1] Plant and freshwater fish fossils are also known, with a large diversity of primitive vascular plants found within the formation.[2]
| Animals | |||||
|---|---|---|---|---|---|
| Genus | Species | Presence | Material | Notes | Images |
| Ankylacanthus | A. incurvus | Cap-aux-Os locality, Gaspé Peninsula.[5] | Fin spines.[5] | A possible gyracanthid, formerly known as Gyracanthus incurvus.[5] | |
| Doliodus | D. latispinosus | Cap-aux-Os Member, north side of Gaspé Bay.[6] | Fin spines.[6] | Also known from the Campbellton and York River formations.[6] | |
| Forillonaspis | F. lehmani | Cap-aux-Os locality | An arthrodire placoderm | ||
| Gaspestria | G. genselorum[7] | Locality W, Cap-aux-Os member | Four partial specimens | Recorded earlier as an undescribed juliform millipede.[8] | |
| Plants | |||||
|---|---|---|---|---|---|
| Genus | Species | Presence | Material | Notes | Images |
| Adelocladoxis | A. praecox | [9] | A cladoxylopsid[9] | ||
| Drepanophycus | D. spinaeformis[10] | North shore of Gaspé Bay | A basal lycopod | ||
| Eddianna | E. gaspiana | In the vicinity of Douglastown.[11] | A rhyniopsid[11] | ||
| Franhueberia | F. gerriennei | South shore of Gaspé Bay, in the vicinity of Douglastown, Quebec.[12] | A fossil preserved anatomically by cellular permineralization.[12] | A euphyllophyte.[12] | |
| Gmujij | G. tetraxylopteroides | South shore of Gaspé Bay, near Douglastown, Québec | Two axis fragments[13] | A euphyllophyte | |
| Jowingeria | J. triloba | South shore of Gaspé Bay, near Douglastown | An axis fragment | A euphyllophyte[14] | |
| Kenrickia | K. bivena | South shore of Gaspé Bay, near Douglastown | Ten separate axes and branches | One of the basalmost radiatopsids[15] | |
| Leptocentroxyla | L. tetrarcha | South shore of Gaspé Bay, near Douglastown | One axis fragment | A euphyllophyte[14] | |
| Nebuloxyla | N. mikmaqiana | South shore of Gaspé Bay, near Douglastown | One axis | A euphyllophyte[16] | |
| Paracladoxylon | P. kespekianum | South shore of Gaspé Bay, east of Douglastown[17] | Nine axis fragments | A cladoxylopsid | |
| Perplexa | P. praestigians | South shore of Gaspé Bay, in the vicinity of Douglastown | One axis fragment | A euphyllophyte[18] | |
| Psilophyton | P. diakanthon, P. princeps[19] | South shore of Gaspé Bay, in the vicinity of Douglastown | A trimerophyte |  | |
| Renalia | R. hueberi | [20] | A vascular plant.[20] |  | |
| Sawdonia | S. ornata | North shore of Gaspé Bay, which is part of the Cap-aux-Os Member.[21] | A zosterophyll.[21] | | |
| Stenoloboxyla | S. ambigua | South shore of Gaspé Bay, near Douglastown | Two axis fragments | A euphyllophyte[14] | |
| Tainioxyla | T. quebecana | South shore of Gaspé Bay, near Douglastown | Two axis fragments | A euphyllophyte[14] | |
| Wilhowia | W. phocarum | North Shore of Gaspé Bay, Quebec, Canada.[22] | Partially permineralized adpressions of remains.[22] | A basal euphyllophyte.[22] | |
| Fungi | |||||
|---|---|---|---|---|---|
| Genus | Species | Presence | Material | Notes | Images |
| Glomites | G. oqoti | In the vicinity of Douglastown, south shore of Gaspé Bay (Quebec, Canada).[23] | Glomoid spores in trimerophyte axes.[23] | ||
See also
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References
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- ^ a b c Burrow, Carole J.; Turner, Susan; Desbiens, Sylvain; Miller, Randall F. (2008-08). "Early Devonian putative gyracanthid acanthodians from eastern CanadaInternational Geoscience Programme (IGCP) Contribution 491, Middle Palaeozoic Vertebrate Biogeography, Palaeogeography, and Climate". Canadian Journal of Earth Sciences. 45 (8): 897–908. doi:10.1139/e08-033. ISSN 0008-4077.
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