Birstonas Formation

Geology

Members: unnamed (37), Dotnuva (1), Dotnuva Beds (2), Jonava Beds (4)

Lithologies: "shale" (3), marl (2), lime mudstone (1), wackestone (28), "limestone" (14)

Paleoenvironments: marine indet. (9), carbonate indet. (8), deep subtidal ramp (28)

Age range: base of the Jaagarahu to the top of the Homerian or 428.20000 to 427.40000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Wenlock433.4 - 427.4Lithuania (13746 13752 207332 207347 207353 207383)
Homerian430.5 - 427.4Lithuania (180058 180059 180060 180061 180062 180063 180064 180065 180066 180067 180068 180069 180070 180071 180072 180073 180074 180075 180076 180077 180078 180079 180080 180081 180082 180083 180084 180085 192657 206823)
Homerian - Jaagarahu430.5 - 422.9Lithuania (192552 192583 192588 192661)
Jaagarahu428.2 - 422.9Lithuania (192559 192572 192658 192659 192660)