Halleck Formation
45 distinct taxa, from 55 fossil occurrences the Paleobiology Database records under this name, spanning 299–294 Mya.
Alaska · US
45 taxa · 55 fossils · 299–294 MyaMacrostrat dates this rock 295–280 Ma. Macrostrat’s own record
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2 distinct localities, where the rock is now rather than where it was laid down. Tectonics draws the world it belonged to.
When
What has been found
- Callaiapsida kekuensis
- Pustula
- Septacamera
- Acanthopecten delawarensis
- Aviculopecten
- Brachythyris ufensis
- Campophyllum
- Cancrinella cancriniformis
- Cancrinella koninckiana
- Chaoiella gruenewaldti
- Chonetes
- Condrathyris perplexa
- Crania
- Derbyia
- Dictyoclostus semireticulatus
- Echinauris subhorrida
- Griffithides
- Kochiproductus porrectus
- Komiella ostiolata
- Leioclema
- Linoproductus cora
- Linoproductus tenuistriatus
- Naticopsis
- Neochonetes granulifer
- Neospirifer cameratus
- Neospirifer fasciger
- Pernopecten aviculatus
- Pinegathyris royssiana
- Platyceras
- Pleurotomaria
- Polypora
- Productus
- Productus splendens
- Pteria
- Purdonella nikitini
- Reticularia
- Rhynchopora
- Schizodus
- Schizophoria
- Spiriferina
The 40 most often recorded, of 45.
What else lived thenRank the rock of a period
Counts are of occurrence records, which measure the rock and the fieldwork together.