Английская Википедия:Gun River Formation
Материал из Онлайн справочника
Перейти к навигацииПерейти к поиску
The Gun River Formation is a geologic formation in Quebec. It preserves fossils dating back to the early Silurian period.
Description
The formation is divided into 4 members (from the base up): the Lachute, Innommée, Sandtop and Macgilvray members. The formation was deposited some 40–80 km offshore from the stable Laurentian craton, underwater at depths of 30 to 60 meters.[1]
Fossil content
Vertebrates
| Conodonts | |||||
|---|---|---|---|---|---|
| Genus | Species | Presence | Material | Notes | Images |
| Anticostiodus | A. fahraeusi | Anticosti Island.[2] | |||
| A. boltoni | Anticosti Island.[2] | ||||
| Icriodella | I. deflecta | Probably instead belongs to the Jupiter Formation.[1] | |||
Invertebrates
| Brachiopods | |||||
|---|---|---|---|---|---|
| Genus | Species | Presence | Material | Notes | Images |
| Brachyprion | Sandtop and Macgilvray Members.[1] | A strophomenid. | |||
| Coolinia | Sandtop and Macgilvray Members.[1] | ||||
| Fenestrirostra | F. glacialis | Lowermost part of the formation.[3] | A rhynchonellidalso found in the Merrimack Formation. | ||
| F. pyrrha | Lachute Member.[1] | A rhynchonellid. | |||
| 'Gotatrypa' | 'G.' sp. | Innommée Member.[1] | |||
| Hyattidina | Sandtop to Macgilvray Members.[1] | An athyrid. | |||
| Joviatrypa | Uppermost Macgilvray Member.[1] | ||||
| Kulumbella | K. xacta | Upper Macgilvray Member.[4][5] | A pentamerid. | ||
| Mendacella | Innommée Member.[1] | A dalmanellid. | |||
| Meristina | Innommée Member.[1] | ||||
| Pentamerus | P. palaformis | Top of the formation (uppermost Macgilvray Member).[1][4] | Also found in the Jupiter Formation. | ||
| Stegerhynchus | [1] | ||||
| Stricklandia | S. gwelani | Top of the formation (Macgilvray Member).[1][4] | Also found in the Jupiter Formation. | ||
| S. sp. | Innommée Member.[4] | A509 (7 broken valves on a slab).[4] | Also found in the uppermost Merrimack Formation. | ||
| Sypharatrypa | S. sp. | Innommée Member.[1] | |||
| Bryozoans | |||||
|---|---|---|---|---|---|
| Genus | Species | Presence | Material | Notes | Images |
| Phaenopora | P. superba | Also found in the Becscie Formation.[6] | |||
| Ptilodictya | P. canadensis | USNM 143039.[6] | |||
| P. sulcata | USNM 143039, 143050; YPM 3063/98, 3063/104.[6] | ||||
| Corals | |||||
|---|---|---|---|---|---|
| Genus | Species | Presence | Material | Notes | Images |
| Acidolites | A. arctatus | [7] | A heliolitid. | ||
| Brachyelasma | [1] | ||||
| Crassilasma | [1] | ||||
| Helicelasma | [1] | ||||
| Palaearaea | Cap aux Goélands (Uppermost Macgilvray Member).[1] | Small colonies.[1] | The only rugosan coral known from the formation, also found in the Menier formation. | ||
| Paleofavosites | P. capax | Multiple colonies.[8] | A tabulate coral. | ||
| Crinoids | |||||
|---|---|---|---|---|---|
| Genus | Species | Presence | Material | Notes | Images |
| Dendrocrinus | [1] | ||||
| Eumyelodactylus | Macgilvray Member.[1] | ||||
| Laurocrinus | Macgilvray Member.[1] | ||||
| Stupatocrinus | Macgilvray Member.[1] | ||||
| Graptolites | |||||
|---|---|---|---|---|---|
| Genus | Species | Presence | Material | Notes | Images |
| Paraclimacograptus | P. cf. innuitus | Deeper water facies of the Sandtop Member.[1] | |||
| Sponges | |||||
|---|---|---|---|---|---|
| Genus | Species | Presence | Material | Notes | Images |
| Camptodictyon | [1] | A stromatoporoid. | |||
| Clathrodictyon | [1] | A stromatoporoid. | |||
See also
References
Шаблон:Canada-geologic-formation-stub
Шаблон:Silurian-stub
Шаблон:Quebec-stub
- ↑ 1,00 1,01 1,02 1,03 1,04 1,05 1,06 1,07 1,08 1,09 1,10 1,11 1,12 1,13 1,14 1,15 1,16 1,17 1,18 1,19 1,20 1,21 1,22 1,23 1,24 1,25 Шаблон:Cite journal
- ↑ 2,0 2,1 Шаблон:Cite journal
- ↑ Шаблон:Cite journal
- ↑ 4,0 4,1 4,2 4,3 4,4 Шаблон:Cite journal
- ↑ Шаблон:Cite journal
- ↑ 6,0 6,1 6,2 Шаблон:Cite journal
- ↑ Шаблон:Cite journal
- ↑ Шаблон:Cite journal
