San Juan Formation
349 distinct taxa, from 793 fossil occurrences the Paleobiology Database records under this name.
The Paleobiology Database files this name in 2 countries. That can be one body of rock crossing a border, or two rocks that happen to share a name. The database does not say which, so nothing below is added across them.
San Juan · AR
253 taxa · 676 fossils · 486–457 MyaMembers recorded: Ahtiella Biozone, Shaly Limestone, C1.
Macrostrat dates this rock 471–461 Ma. Macrostrat’s own record
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22 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
- Ansella
- Protopanderodus
- Semiacontiodus
- Fahraeusodus
- Juanognathus
- Acodus similaris
- Ansella jemtlandica
- Cornuodus longibasis
- Drepanoistodus costatus
- Lenodus variabilis
- Parapaltodus
- Parapanderodus
- Periodon macrodentatus
- Pteracontiodus
- Erraticodon
- Paroistodus horridus
- Paroistodus originalis
- Rossodus
- Annamitella
- Archaeoscyphia
- Leptella
- Oistodella
- Tritoechia
- Annamitella tellecheai
- Bryantodina
- Calycocoelia
- Drepanoistodus bellburnensis
- Maclurites
- Paroistodus horridus primus
- Paroistodus horridus secundus
- Polonodus
- Scolopodus striatus
- Baltoniodus
- Costiconus costatus
- Drepanoistodus
- Drepanoistodus basiovalis
- Orthidium
- Protopanderodus robustus
- Rhopalocoelia
- Aulocopium
The 40 most often recorded, of 253.
Chiapas · MX
96 taxa · 117 fossils · 48–38 MyaFiled under the La Esperanza Group. Members recorded: Middle, Middle Sandstone Grit.
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5 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
- Actinacis barretti
- Nummulites
- Amphistegina
- Calappilia hondoensis
- Cerithium
- Dardanus mexicanus
- Heliopora mexicanae
- Lophoranina cristaspina
- Placosmilia copoyensis
- Pseudophragmina
- Rhizangia
- Siderastrea scotia
- Stylophora cambridgensis
- Actinacis
- Antilloseris cantabrigiensis
- Architectonica
- Architectonica alabamensis
- Astreopora (Astreopora) esperanzae
- Astreopora esperanzae
- Astrocoenia guantanamensis
- Balanophyllia caulifera
- Bernaya (Bernaya) obesa
- Bittium (Bittium) estellensis
- Calappidae
- Callianassa
- Calliostoma granulata
- Calyptraea (Trochita) aperta
- Carcharias
- Cirsotrema
- Cladocora bosquensis
- Cornulina
- Crommium globosa
- Cyathoseris allisoni
- Cypraeorbis
- Eocypraea (Eocypraea)
- Eocypraea (Eocypraea) castacensis
- Eocypraea inflata
- Eofabiania
- Eopustularia acyensis
- Eopustularia bartonensis
The 40 most often recorded, of 96.
What else lived thenRank the rock of a period
Counts are of occurrence records, which measure the rock and the fieldwork together.