Stepovak Formation
52 distinct taxa, from 115 fossil occurrences the Paleobiology Database records under this name, spanning 34–23 Mya.
Alaska · US
52 taxa · 115 fossils · 34–23 MyaFiled under the Beaver Bay Group.
Macrostrat places this rock in the Beaver Bay Group. Macrostrat’s own record
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6 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
- Spisula
- Acrilla (Ferminoscala) atwoodi
- Macoma
- Ostrea
- Yoldia
- Acila (Truncacila) shumardi
- Corbicula
- Ostreidae
- Natica
- Spisula callistaeformis
- Dentalium
- Solena
- Calyptraea
- Chlamys ashiyaensis
- Cyclocardia
- Eumorphocorystes
- Margarites
- Modiolus
- Mya
- Nemocardium
- Papyridea harrimani
- Periploma
- Perse
- Saxidomus
- Siphonalia
- Acila
- Acila (Acila) brevis
- Acila (Acila) gettysburgensis
- Acila (Acila) praedivaricata
- Anechinocardium lorenzanum
- Brachidontes
- Chlamys
- Cochlodesma bainbridgensis
- Conchocele bisecta
- Crepidula ungana
- Cryptonatica
- Exilia
- Homalopoma
- Lucinoidea
- Macrocallista
The 40 most often recorded, of 52.
What else lived thenRank the rock of a period
Counts are of occurrence records, which measure the rock and the fieldwork together.