Denckmannites-Cromus Assemblage, Prague Basin: Ludfordian, Czech Republic
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Cephalopoda
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Nautiloidea indet.
Agassiz 1847
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Bivalvia
- Cyrtodontida
- Cardiolidae
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Cardiolidae indet.
Hoernes 1884
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Bivalvia
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Pelecypoda indet.
Goldfuss 1820
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Trilobita
- Phacopida
- Encrinuridae
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Cromus intercostatus
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Cromus bohemicus
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Trilobita
- Phacopida
- Phacopidae
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Denckmannites volborthi
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Trilobita
- Harpetida
- Harpetidae
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Bohemoharpes vittatus
(Barrande 1852)
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| see common names | |||||||
Geography
| Country: | Czech Republic |
| Coordinates: | 50.0° North, 14.3° East (view map) |
| Paleocoordinates: | 51.0° South, 56.8° East |
| Basis of coordinate: | based on political unit |
| Geographic resolution: | local area |
Time
| Period: | Silurian | Epoch: | Ludlow |
| Stage: | Ludfordian | 10 m.y. bin: | Silurian 2 |
| *International age/stage: | Late/Upper Ludfordian | ||
| Key time interval: | Ludfordian | ||
| Age range of interval: | 425.6 - 423 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Kopanina | ||||
| Stratigraphic resolution: | formation | ||||
| Stratigraphy comments: topmost Kopanina | |||||
Lithology and environment
| Primary lithology: | shelly/skeletal,gray lime mudstone |
| Secondary lithology: | shelly/skeletal,gray "limestone" |
| Includes fossils? | Y |
| Lithology description: "Light to dark grey, strongly bituminous biodetrital and biomicritic limestones with linear arranged cephalopod shells and abundant bivalves (cardiolids are typical) yield only sporadic and fragmented trilobite remains..." | |
| Environment: | marine indet. |
| Geology comments: "According to Horny (1962), the cephalopod limestones represent the most offshore tongues of teh carbonate development. Kriz (1979) presumed a rather shallow wwater environment within the reach of surface currents, Turek (1974) inferred a slow sedimentation in a sublittoral zone below the wave base. Stratigraphical relationships to adjacent facies suggest a condensed sedimentation, probably BA 4." | |
Taphonomy
Collection methods and comments
| Collection excludes: | some macrofossils |
| Reason for describing collection: | paleoecologic analysis |
| Collection method comments: Similar to PBDB collection 14112 (Nautiloid-Bivalve biofacies. of Havlicek and Storch 1999), but not identical. | |
| Taxonomic list comments:Only trilobites are listed to genus level, but many other groups reported present. | |
Metadata
| Database number: | 14129 | ||
| Authorizer: | M. Foote | Enterer: | M. Foote |
| Modifier: | M. Foote | Research group: | marine invertebrate |
| Created: | 2002-05-15 20:38:15 | Last modified: | 2006-09-15 15:14:05 |
| Access level: | the public | Released: | 2002-05-15 20:38:15 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 6191. | I. Chlupac. 1987. Ecostratigraphy of Silurian trilobite assemblages of the Barrandian area, Czechoslovakia. Newsletters on Stratigraphy 17(3):169-186 [M. Foote/M. Foote/M. Foote] |