Halla Formation
Geology
Members: unnamed (11), B (1), Djupvik (15), Mulde Brick Clay (2), Mulde Brick-clay (4)
Lithologies: not reported (2), claystone (2), "shale" (1), siltstone (1), marl (8), lime mudstone (2), wackestone (11), packstone (3), grainstone (6), "reef rocks" (1), floatstone (2), rudstone (2), bafflestone (1), "limestone" (23), phosphorite (1)
Paleoenvironments: marine indet. (12), carbonate indet. (10), open shallow subtidal (3), lagoonal/restricted shallow subtidal (5), sand shoal (1), reef, buildup or bioherm (3), deep subtidal ramp (12), marginal marine indet. (1), estuary/bay (1)
Collections
Time interval | Ma | Country or state | Original ID and collection number |
---|---|---|---|
Silurian | Sweden (Gotland) | (210179 210183 210186) | |
Wenlock | Sweden (Gotland) | (192329 192331 192354 192355 192359) | |
Homerian | Sweden (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) | |
Homerian | Sweden | (77538 161075 179981 179982 179987 179988 179989 179990) | |
Gleedonian | Sweden (Gotland) | (228990) | |
Emsian | Australia (Victoria) | (225148) | |
Early/Lower Sinemurian | United Kingdom (Scotland) | (165070) | |
Lutetian | Jordan | (64351) | |
Priabonian | Jordan | (32899) |