Halla Formation

Age range: base of the Homerian to the top of the Priabonian or 430.50000 to 33.90000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Silurian443.8 - 419.2Sweden (Gotland) (210179 210183 210186)
Wenlock433.4 - 427.4Sweden (Gotland) (192329 192331 192354 192355 192359)
Homerian430.5 - 427.4Sweden (Gotland) (13528 13550 13551 13552 13599 13600 13635 13643 13694 13851 163529 163530 163531 163532 163537 163538 163539 163540 163541 163542 163543 163544 163545 163546 192268 192269 193022)
Homerian430.5 - 427.4Sweden (77538 161075 179981 179982 179987 179988 179989 179990)
Gleedonian425.4 - 427.4Sweden (Gotland) (228990)
Emsian407.6 - 393.3Australia (Victoria) (225148)
Early/Lower Sinemurian196.5 - 189.6United Kingdom (Scotland) (165070)
Lutetian47.8 - 41.3Jordan (64351)
Priabonian38.0 - 33.9Jordan (32899)