The information on this page is a summary description.
The full formal description is available here: Sleen Formation
| Abbreviation | |
| Parent unit | Altena Group |
| Child units | |
| Lithological description | Open marine, grey, locally sandy or silty claystones. The appearance of red claystones and dolomitic mudstones marks the contact with the underlying Keuper Formation. Top: passing concordantly into Aalburg Formation; base: disconformably overlying Keuper Formation. |
| Age | Uppermost Triassic, Rhaetian, dated by Legrand ( 1961 and in Delmer, 1963) and by M. Roche (personal communication) on the basis of macrofossils and palynomorphs. |
| Thickness | ca. 30 m. |
| Area of occurrence | Roer Valley Graben ; removed by erosion from Campine Basin and eastern Brabant Massif. |
| Type locality | Parastratotypes in Belgium: well KB99 Neeroeteren, well KB 198 Molenbeersel. |
| Alternative names | |
| Authors | Dusar, M., Langenaeker, V. & Wouters, L. |
| Date | 01/01/2001 |
| Cite as | Dusar, M., Langenaeker, V. & Wouters, L., 2001. The Sleen Formation, 01/01/2001. National Commission for Stratigraphy Belgium. https://ncs.naturalsciences.be/lithostratigraphy/Sleen-Formation |
| Additional information | The lithological and palynostratigraphical resemblance to the Rhaetian in the Gaume (SE Belgium, Paris Basin) strongly suggests a connection over the Ardennes and eastern Brabant Massif active during time of deposition (M. Roche, personal communication). This is the first mention of the Sleen Formation in Belgium. The Sleen and Aalburg Formations are distinguished on the basis of the Dutch stratigraphical nomenclature. Limited data from Belgium do not yet allow a clear distinction. |
