Dyrham Formation
From Wikipedia, the free encyclopedia
The Dyrham Formation is a geologic formation in England. It preserves fossils dating back to the early part of the Jurassic period (Pliensbachian).[1]
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TypeFormation
Unit ofLias Group
Sub-unitsEype Clay Member, Down Cliff Sand Member, Thorncombe Sand Member
| Dyrham Formation | |
|---|---|
| Stratigraphic range: | |
| |
| Type | Formation |
| Unit of | Lias Group |
| Sub-units | Eype Clay Member, Down Cliff Sand Member, Thorncombe Sand Member |
| Underlies | Beacon Limestone Formation, Marlstone Rock Formation |
| Overlies | Charmouth Mudstone Formation |
| Area | Wessex Basin, Worcester Basin, East Midlands Shelf |
| Thickness | ~125 m |
| Lithology | |
| Primary | mudstone, silt, sand |
| Other | ferruginous limestone |
| Location | |
| Region | England |
| Country | United Kingdom |
| Type section | |
| Named for | Dyrham |
