Williams Formation
93 distinct taxa, from 175 fossil occurrences the Paleobiology Database records under this name, spanning 84–66 Mya.
California · US
93 taxa · 175 fossils · 84–66 MyaMembers recorded: Pleasants, Pleasants Sandstone, Schulz Ranch, Schultz.
Macrostrat dates this rock 101–66 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
- Calva (Egelicalva) bowersiana
- Pterotrigonia evansana
- Glycymerita veatchii
- Paraesa lens
- Pentzia hilgardi
- Biplica obliqua
- Cucullaea (Idonearca) youngi
- Metaplacenticeras pacificum
- Atira ornatissima
- Gyrodes (Sohlella) pacificus
- Clisocolus cordatus
- Crassatella
- Cymbophora ashburnerii
- Cymbophora popenoei
- Odostomia santana
- Perissitys pacifica
- Trinacria cor
- Volutoderma elderi
- Volutoderma santana
- Acila (Truncacila) demessa
- Anomia lineata
- Brachidontes bifurcatus
- Clisocolus dubius
- Cymbophora stantoni
- Dentalium (Entalis) whiteavesi
- Eriphyla lapidis
- Grammatodon (Indogrammatodon)
- Gyrodes expansa
- Legumen ooides
- Scaphander (Mirascapha) costatus
- Tenea inflata
- Turritella chicoensis perrini
- Turritella chicoensis pescaderoensis
- Volutoderma blakei
- Yaadia robusta
- Ammonoidea
- Ampullina
- Ampullina packardi
- Anapachydiscus peninsularis
- Anchura phaba
The 40 most often recorded, of 93.
What else lived thenRank the rock of a period
Counts are of occurrence records, which measure the rock and the fieldwork together.