Choptank Formation
324 distinct taxa, from 923 fossil occurrences the Paleobiology Database records under this name, spanning 16–12 Mya.
Maryland, Virginia · US
324 taxa · 923 fossils · 16–12 MyaFiled under the Chesapeake Group. Members recorded: Drumcliff, Boston Cliffs, Conoy, St. Leonard, Boston Cliff.
Macrostrat places this rock in the Chesapeake Group, and dates it 24–12 Ma. Macrostrat’s own record
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10 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
- Bicorbula idonea
- Chesapecten (Chesapecten) nefrens
- Astarte thisphila
- Chesacardium laqueatum
- Marvacrassatella turgidula
- Concavus concavus
- Dallarca staminea
- Dosinia acetabulum
- Corbula inaequalis
- Pitar
- Mariacolpus plebeia
- Spisula (Hemimactra) subparilis
- Ecphora
- Isognomon maxillata
- Mercenaria
- Parvilucina crenulata
- Euspira heros
- Decapoda
- Stewartia anodonta
- Crucibulum multilineatum
- Mercenaria cuneata
- Mytilus
- Calliostoma
- Chesapecten madisonius
- Discinisca lugubris
- Semele carinata
- Turritella (Torcula) variabilis
- Cadulus newtonensis
- Florimetis biplicata
- Glossus
- Macrocallista marylandica
- Modiolus
- Abertella aberti
- Aligena aequata
- Calliostoma philanthropus
- Dosinia acetabulum blackwelderi
- Neverita duplicatus
- Nucula taphria
- Panopea americana
- Semele subovata
The 40 most often recorded, of 324.
What else lived thenRank the rock of a period
Counts are of occurrence records, which measure the rock and the fieldwork together.