| Jupiter Formation | |
| Type: | Geological formation |
| Age: | Early Silurian (Aeronian-Telychian) |
| Namedfor: | Jupiter River |
| Namedby: | Schuchert and Twenhofel |
| Year Ts: | 1910 |
| Subunits: | From the base upwards:
|
| Overlies: | Gun River Formation |
| Thickness: | 167 meters |
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.
| Trace fossils | |||||
|---|---|---|---|---|---|
| Genus | Species | Presence | Material | Notes | Images |
| Klemmatoica | K. linguliforma | Goéland Member. | Associated with the brachiopod Rowellella and the shell of a Phanerotrema. | ||
| Trypanites | Goéland Member.[2] | Borings in gastropod shells. | |||
| Brachiopods | |||||
|---|---|---|---|---|---|
| Genus | Species | Presence | Material | Notes | Images |
| Clorinda | C. (Phricoclorinda) chaloupensis | Cybèle Member.[4] | 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). | ||
| C. tumidula | Goéland, Richardson, Ferrum and Pavillon Members. | ||||
| C. superundata | Goéland Member | ||||
| Costistricklandia | C. brevis | Pavillon Member. | "A279b (1 broken ventral valve, 1 small slab with interiors exposed) and A333 (>10 fragmentary, disarticulated valves)". | ||
| C. gaspeensis | Pavillon Member (top). | A 107-108 (1); A 279b (5 broken valves on small slab); A281 (3); A418-5 (10 valves on slabs); A554 (2). | |||
| Dihelictera | D. acrolopha | East Point Member.[5] | Several hundred specimens. | ||
| Ehlersella | E. davidsonii | Cybèle and Ferrum members. | |||
| E. transulcata | Basal Ferrum Member. | A 185 (a crushed shell) and A 1066b (32, variously damaged). | |||
| Joviatrypa | J. brabyla | Lower Goéland Member. | Several thousand specimens. | ||
| Microcardinalia | M. (Chiastodoca) salterii | Ferrum Member | |||
| M. (Chiastodoca) richardsoni | Goéland and Richardson members. | ||||
| M. (Chiastodoca) fabatina | Upper Ferrum Member. | A101 (270 specimens). | |||
| M. (Dauphinella) divaricata | Cybèle and Ferrum members. | ||||
| M. (Dauphinella) melissa | Uppermost Ferrum Member and Pavillon Member. | ||||
| M. (Dauphinella) sp. | Ferrum and Pavillon Members. | A255 (16 free shells, 6 slabs with shells in life position) and A108 (1 specimen). | |||
| Parastrophinella | P. ops | Upper Richardson Member. | A1158 (3 shells). | ||
| P. sp. | East Point Member and Ferrum Member. | A863 (1 shell) and A959 (1 shell). | |||
| Pentameroides | P. subrectus | Pavillon Member. | "A333 (about 1 conjoined shell; 40 incomplete specimens), A 1395 (6 conjoined shells, 12 ventral valves)". | ||
| Pentamerus | P. oblongus | Richardson, Cybèle, Ferrum and Pavillon Members. | |||
| P. palaformis | Goéland Member. | Also found in the Gun River Formation. | |||
| Rowellella | R.? anticostiensis | Goéland Member. | Specimen associated with the shell of a Phanerotrema and the trace fossil Klemmatoica linguliforma. | A lingulid. | |
| Stricklandia | S. gwelani | Goéland Member. | Also found in the Gun River Formation. | ||
| S. planirostrata | Ferrum Member. | ||||
| Echinoderms | |||||
|---|---|---|---|---|---|
| Genus | Species | Presence | Material | Notes | Images |
| Perforocycloides | P. nathalieae | Cybèle Member.[7] | MPEP335.7. | A cyclocystoid. | |
| Rhenopyrgus | R. viviani | Cybèle Member to Pavillon Member.[8] | An edrioasteroid. | ||