Mercia Mudstone Group
Geology
Formations: unnamed (5), Auchenhew Mudstone (12), Blue Anchor (2), Keuper Waterstones (3), Tarporley Siltstone (2)
Lithologies: not reported (3), claystone (1), mudstone (10), sandstone (8), marl (3), "limestone" (1)
Paleoenvironments: terrestrial indet. (8), carbonate indet. (1), peritidal (12), paralic indet. (1), alluvial fan (1), lacustrine indet. (1)
Age range: base of the Early/Lower Triassic to the top of the Late/Upper Triassic or 252.17000 to 201.40000 Ma
Collections
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Triassic | United Kingdom (England) | (164932 164930) | |
| Anisian | United Kingdom (England) | (52505 80838 83053 184946 186039) | |
| Ladinian | United Kingdom (Scotland) | (181936 181937 181938 181939 181940 181941 181942 181943 181944 181945 181946 181947) | |
| Late/Upper Triassic | United Kingdom (Wales) | (57952) | |
| Norian | United Kingdom (Wales) | (57949 222914) | |
| Rhaetian | United Kingdom (Wales) | (72293) | |
| Rhaetian | United Kingdom (England) | (89048) |