| Mulde Formation | |
| Namedfor: | Mulde |
| Period: | Gorstian |
| Age: | Gorstian ~ |
| Prilithology: | Marlstone, limestone |
| Type: | Geological formation |
| Overlies: | Slite Formation |
| Underlies: | Klinberg formation |
| Region: | South Gotland |
The Mulde formation is a sequence of Silurian bluish-gray marlstone and agrillceous limestones found on the southwestern part of the island of Gotland. It generally becomes harder and less marly in the upper parts of the formation.[1]
The formation holds some of the best fossils on Gotland, being the best place to find well preserved trilobites. Some examples are Calymene, Dalmanites, Encrinurus and Proteus.[2] Ostracods (beyrichids etc.), brachiopods (Atrypa reticularis, Leptaena, Eospirifer etc.), bryozoans and tentaculitids are also relatively common while corals, grapolites, annelids and cephalopods are more rare.[3]