Holder Formation
143 distinct taxa, from 187 fossil occurrences the Paleobiology Database records under this name, spanning 304–299 Mya.
New Mexico · US
143 taxa · 187 fossils · 304–299 MyaFiled under the Magdalena Group.
Macrostrat dates this rock 303–299 Ma. Macrostrat’s own record
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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
- Pseudozygopleura (Pseudozygopleura)
- Ananias
- Derbyia
- Nuculavus
- Permophorus
- Bellerophon graphicus
- Bivalvia
- Brachiopoda
- Bryozoa
- Colpites monilifera
- Composita subtilita
- Economolopsis anodontoides
- Edmondia
- Eugonophyllum johnsonii
- Gastropoda
- Hypergonia
- Hystriculina wabashensis
- Isogramma
- Leptodesma (Leptodesma)
- Linoproductus
- Lissochonetes
- Metacoceras
- Orthonema
- Ostracoda
- Ozarkodina
- Parallelodon
- Pharkidonotus
- Polidevcia arata
- Pseudorthoceras knoxense
- Retispira tenuilineata
- Acanthopecten carboniferus
- Algae
- Amaurotoma subsinuata
- Ammovertella
- Amphiscapha subrugosa
- Anomphalus
- Apterrinella
- Araeonema novamexicanum
- Astartella varica
- Astartella vera
The 40 most often recorded, of 143.
What else lived thenRank the rock of a period
Counts are of occurrence records, which measure the rock and the fieldwork together.