Staa Formation

Geology

Members: unnamed (42)

Lithologies: "shale" (1), marl (7), "limestone" (34)

Paleoenvironments: open shallow subtidal (1), deep subtidal indet. (8), offshore indet. (33)

Age range: base of the Spinatum to the top of the Aalenian or 189.60000 to 170.30000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Margaritatus189.6 - 183.0Tunisia (170516 170520 170525 170530 170547 170561 170562 170563 170574)
Spinatum189.6 - 183.0Tunisia (170510 170575 170576 170577 170578 170579 170587 170588 170589 170594 170610)
Early/Lower Toarcian183.0 - 182.0Tunisia (170564 170595 170611)
Falciferum183.0 - 182.0Tunisia (170590)
Toarcian182.7 - 174.1Tunisia (170603)
Bifrons182.0 - 175.6Tunisia (170565 170566 170567 170568 170569 170571 170592 170597 170596 170598 170599 170600 170612 170613)
Middle Toarcian182.0 - 175.6Tunisia (170601)
Variabilis182.0 - 175.6Tunisia (170572)
Aalenian174.1 - 170.3Tunisia (170602)