Jupiter Formation
Geologic formation in Quebec, Canada
From Wikipedia, the free encyclopedia
The Jupiter Formation is a geologic formation in Quebec, well-exposed in the southern third of Anticosti Island and lying in the St Lawrence River Valley.[1] It preserves fossils dating back to the Silurian period.
Sub-unitsFrom the base upwards:
- Goéland Member
- East Point Member
- Richardson Member
- Cybèle Member
- Ferrum Member
- Pavillon Member
OverliesGun River Formation[1]
Thickness167 meters[1]
| Jupiter Formation | |
|---|---|
| Stratigraphic range: Early Silurian (Aeronian-Telychian) | |
| Type | Geological formation |
| Sub-units | From the base upwards:
|
| Overlies | Gun River Formation[1] |
| Thickness | 167 meters[1] |
| Location | |
| Region | Quebec |
| Country | Canada |
| Type section | |
| Named for | Jupiter River |
| Named by | Schuchert and Twenhofel[1] |
| Year defined | 1910[1] |
Fossil content
Color key
|
Notes Uncertain or tentative taxa are in small text; |
Trace Fossils
| Trace fossils | |||||
|---|---|---|---|---|---|
| Genus | Species | Presence | Material | Notes | Images |
| Klemmatoica | K. linguliforma | Goéland Member.[2] | Associated with the brachiopod Rowellella and the shell of a Phanerotrema.[2] | ||
| Trypanites | Goéland Member.[3] | Borings in gastropod shells.[3] | |||
Vertebrates
| Conodonts | |||||
|---|---|---|---|---|---|
| Genus | Species | Presence | Material | Notes | Images |
| Icriodella | I. deflecta | Lower two members.[4] | Material originally thought to be from the Gun River Formation.[4] | ||
Invertebrates
| Brachiopods | |||||
|---|---|---|---|---|---|
| Genus | Species | Presence | Material | Notes | Images |
| Clorinda | C. (Phricoclorinda) chaloupensis | Cybèle Member.[5] | A749 (112, mostly well-preserved); A850 (178); A937 (about 100,some embedded in small blocks); A939 (44); A1040 (105); A1047 (1); A1064b (76); A1125 (68).[5] | ||
| C. tumidula | Goéland, Richardson, Ferrum and Pavillon Members.[5] | ||||
| C. superundata | Goéland Member[5] | ||||
| Costistricklandia | C. brevis | Pavillon Member.[5] | "A279b (1 broken ventral valve, 1 small slab with interiors exposed) and A333 (>10 fragmentary, disarticulated valves)".[5] | ||
| C. gaspeensis | Pavillon Member (top).[5] | A 107-108 (1); A 279b (5 broken valves on small slab); A281 (3); A418-5 (10 valves on slabs); A554 (2).[5] | |||
| Dihelictera | D. acrolopha | East Point Member.[6] | Several hundred specimens.[6] | ||
| Ehlersella | E. davidsonii | Cybèle and Ferrum members.[5] | |||
| E. transulcata | Basal Ferrum Member.[5] | A 185 (a crushed shell) and A 1066b (32, variously damaged).[5] | |||
| Joviatrypa | J. brabyla | Lower Goéland Member.[6] | Several thousand specimens.[6] | ||
| Microcardinalia | M. (Chiastodoca) salterii | Ferrum Member[5] | |||
| M. (Chiastodoca) richardsoni | Goéland and Richardson members.[5] | ||||
| M. (Chiastodoca) fabatina | Upper Ferrum Member.[5] | A101 (270 specimens).[5] | |||
| M. (Dauphinella) divaricata | Cybèle and Ferrum members.[5] | ||||
| M. (Dauphinella) melissa | Uppermost Ferrum Member and Pavillon Member.[5] | ||||
| M. (Dauphinella) sp. | Ferrum and Pavillon Members.[5] | A255 (16 free shells, 6 slabs with shells in life position) and A108 (1 specimen).[5] | |||
| Parastrophinella | P. ops | Upper Richardson Member.[5] | A1158 (3 shells).[5] | ||
| P. sp. | East Point Member and Ferrum Member.[5] | A863 (1 shell) and A959 (1 shell).[5] | |||
| Pentameroides | P. subrectus | Pavillon Member.[5] | "A333 (about 1 conjoined shell; 40 incomplete specimens), A 1395 (6 conjoined shells, 12 ventral valves)".[5] | ||
| Pentamerus | P. oblongus | Richardson, Cybèle, Ferrum and Pavillon Members.[5] |  | ||
| P. palaformis | Goéland Member.[5] | Also found in the Gun River Formation. | |||
| Rowellella | R.? anticostiensis | Goéland Member.[2] | Specimen associated with the shell of a Phanerotrema and the trace fossil Klemmatoica linguliforma.[2] | A lingulid. | |
| Stricklandia | S. gwelani | Goéland Member.[5] | Also found in the Gun River Formation. | ||
| S. planirostrata | Ferrum Member.[5] | ||||
| Cornulitids | |||||
|---|---|---|---|---|---|
| Genus | Species | Presence | Material | Notes | Images |
| Conchicolites | Goéland Member.[2] | Two individuals encrusting the surface of a Clathrodictyon, which itself is associated with a Phanerotrema shell.[2] | |||
| Echinoderms | |||||
|---|---|---|---|---|---|
| Genus | Species | Presence | Material | Notes | Images |
| Perforocycloides | P. nathalieae | Cybèle Member.[8] | MPEP335.7.[8] | A cyclocystoid. | |
| Rhenopyrgus | R. viviani | Cybèle Member to Pavillon Member.[9] | An edrioasteroid. | ||
| Gastropods | |||||
|---|---|---|---|---|---|
| Genus | Species | Presence | Material | Notes | Images |
| Phanerotrema | P. sp. | Goéland Member.[3][2] | Shells, some with Trypanites borings or other associated organisms.[3][2] | A phanerotrematid. | |
| Sponges | |||||
|---|---|---|---|---|---|
| Genus | Species | Presence | Material | Notes | Images |
| Clathrodictyon | Goéland Member.[2] | Specimen found growing on a Phanerotrema shell.[2] | A stromatoporoid. | ||
| Trilobites | |||||
|---|---|---|---|---|---|
| Genus | Species | Presence | Material | Notes | Images |
| Encrinurus | E. deomenos | [10] | |||
| Dalmanites | D. jupiterensis | [11] | |||
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