Heceta Formation
50 distinct taxa, from 90 fossil occurrences the Paleobiology Database records under this name, spanning 443–420 Mya.
Alaska · US
50 taxa · 90 fossils · 443–420 MyaLoading coastlines…
4 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
- Aphrosalpinx textilis
- Cystothalamiella irregularis
- Aphrosalpinx nana
- Nematosalpinx hormathodes
- Rothpletzella
- Craticula gotlandica
- Girvanella problematica
- Solenopora
- Stromatoporoidea
- Zelophyllum
- Allonema silurica
- Anthozoa
- Aphrosalpingidae
- Brachiopoda
- Crinoidea
- Cystiphyllum
- Epiphyton
- Hecetaphyton
- Hedstroemia
- Sphaerina
- Tuxekanella
- Alaskaspongiella laminosa
- Amphipora
- Atrypoidea
- Brooksina
- Cladospongia alaskensis
- Conchidium
- Cystothalamiella alaskaensis
- Entelophyllum
- Fletcheria
- Gastropoda
- Girtyocoelia epiporata
- Girvanella
- Halysitidae
- Harpidium
- Kirkidium
- Lithistida
- Ludlovia multispora
- Microplasma
- Monolaminospongia gigantia
The 40 most often recorded, of 50.
What else lived thenRank the rock of a period
Counts are of occurrence records, which measure the rock and the fieldwork together.