Alan Mountain Limestone Formation
67 distinct taxa, from 102 fossil occurrences the Paleobiology Database records under this name, spanning 359–343 Mya.
Montana · US
67 taxa · 102 fossils · 359–343 MyaMembers recorded: upper, lower.
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1 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
- Composita
- Cyathaxonia
- Punctospirifer
- Spirifer
- Syringothyris
- Torynifer
- Aulopora
- Avonia
- Brachythyris
- Chonetes
- Cleiothyridina
- Crinoidea
- Dictyoclostus
- Dimegelasma
- Fenestella
- Homalophyllites
- Leptaena
- Orbiculoidea
- Orbinaria
- Productus
- Proetida
- Rhynchonellidae
- Rotiphyllum
- Rylstonia
- Schuchertella
- Syringopora
- Vesiculophyllum
- Zaphrentites
- Ammonoidea
- Amplexus
- Archaeogastropoda
- Bairdia
- Bellerophontoidea
- Bivalvia
- Buxtonia
- Camarotoechia
- Canadiphyllum
- Chondrichthyes
- Crurithyris
- Cryptostomata
The 40 most often recorded, of 67.
What else lived thenRank the rock of a period
Counts are of occurrence records, which measure the rock and the fieldwork together.