Lower Chalk Formation
Geology
Group: Chalk
Members: unnamed (41), Basement Bed (4), Dixoni Limestone (1), Grey Chalk (10), Lower Pink Band (2)
Lithologies: sandstone (1), conglomerate (2), lime mudstone (7), chalk (33), wackestone (7), "limestone" (9)
Paleoenvironments: marine indet. (11), carbonate indet. (36), offshore shelf (3), offshore indet. (5), basinal (carbonate) (2), coastal indet. (1)
Age range: Early/Lower Cenomanian or 99.60000 to 93.50000 Ma
Collections
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Cenomanian | United Kingdom (England) | (113106 141829 159609 159602 159603 159604 159605 159606 159607 159608 159610 159611 159612 159613 159614 159615 159616 226221 226222) | |
| Cenomanian | United Kingdom | (57476 57477 57478 57479 57480 57481 57482 57483 57484 60747 63044 154006 154008 154009 154014 154015 154021) | |
| Cenomanian | France | (154020) | |
| Cenomanian | United Kingdom (Kent) | (234317) | |
| Early/Lower Cenomanian | United Kingdom (England) | (82911 92428 118335) | |
| Early/Lower Cenomanian | United Kingdom | (60750) | |
| Late/Upper Cenomanian | United Kingdom (England) | (82797 82810 82855 82857 82910 82913 82916 82919) | |
| Middle Cenomanian | United Kingdom | (60748 60749) | |
| Middle Cenomanian - Late/Upper Cenomanian | United Kingdom (England) | (59055 63042) | |
| Turonian | United Kingdom (England) | (159618 159619 159620 159621) |