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Collection: Lingula-Orbiculoid Community, Mosalem Formation, Jackson County, Iowa Jackson County, Iowa, USA
| Age | 443.4 - 433.4 Ma (Silurian) |
|---|---|
| Interval | Llandovery |
| Lat/Long | 42.25,-90.4167 |
| Co-ordinates derived from | based on political unit |
| Location | Dalmanella-Eospirigerina Community |
| Mindat.org Region (for given coordinates) | Jackson County, Iowa, USA |
| Geographic Scale | local area |
| Geographic Comments | Bellevue State Park, E 1/2 SE NE sec. 19, T86N, R5E, Jackson Co., Iowa. |
| Formation | Mosalem |
| Stratigraphic Scale | member |
| Straigraphic Comments | Lower part of the Mosalem Formation. |
| Lithology Description | "...finely laminated sequence of argillaceous carbonate mud (dolomitized)" |
| Lithology | lime mudstone |
| Minor Lithology | argillaceous |
| Environment | lagoonal/restricted shallow subtidal |
| Tectonic Setting | cratonic basin |
| Geology Comments | "Lower Mosalem Formation [representes] restricted embayments (flooded valleys) along margins of a transgressing epicontinental sea. This position suggests BA 1 nearshore...organic carbon suggests low oxygen...facies characteristic of shoreface...pseudomorphs of halie hopper crystals suggest hypersaline lagoons..." |
Associated Collections
| Collection | Formation | Member | Lithology | Age |
|---|---|---|---|---|
| Dalmanella-Eospirigerina Community, Mosalem Formation, Jackson Co., Iowa | Mosalem | lime mudstone | 443.4 - 440.8 Ma (Silurian) |
Recorded Fossils
Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!
