Esna Formation

Geology

Members: unnamed (1)

Lithologies: not reported (1), "shale" (4), siltstone (3), sandstone (1)

Paleoenvironments: terrestrial indet. (3), shoreface (2), offshore (2), deep-water indet. (2)

Age range: base of the St Davids to the top of the Hemphillian or 509.00000 to 4.90000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
St Davids509.0 - 497.0Canada (British Columbia) (122017 122072)
Tremadocian - Floian485.4 - 470.0Czech Republic (120529)
Klabava478.6 - 466.0Czech Republic (3838)
Middle Campanian83.5 - 70.6USA (Texas) (90466)
Ypresian56.0 - 47.8Egypt (169302)
Clarendonian - Hemphillian12.5 - 4.9USA (Washington) (175228)
Hemphillian10.3 - 4.9USA (Oregon) (19015)
late Early Hemphillian10.3 - 4.9USA (Oregon) (163572)