The information on this page is a summary description.
The full formal description is available here: Weert Member
| Abbreviation | |
| Parent unit | Arenberg Formation |
| Child units | |
| Lithological description | Mainly fine to medium fine sand, sometimes coarse sand with fine gravel, with laminae and beds on mm to dm scale consisting of sandy clay or peat detritus, which increase in thickness and frequency in an upward direction and pass gradually into sand-clay bedding and eventually into clay or sandy clay with sand laminae. In most cases, the deposits contain small plant and mollusc fragments. The colour of the sand varies from brown to grey brown above the ground water level to grey, brownish grey or blue grey below, while the clay laminae are brown to grey brown. This unit occurs on the convex inner bank of middle to late Holocene river meanders, in an erosive position relative to older units (e.g. the peat of the Rotselaar Member). Where the meander belt has migrated laterally since the formation of this unit, the relation with the (contemporary) river channel may be unclear. Sediments of the Weert Member are overlain by the floodplain deposits of the St. Paulus Member (Fig. 1) and may also be covered by fresh or brackish water tidal deposits of the Vlaanderen Formation. The deposits are interpreted as late Holocene lateral accretion and channel deposits. |
| Age | Late Holocene. |
| Thickness | The unit reaches a maximum thickness of 5 to 6 m in the type area. This may vary according to the size of the river and the position within the river basin. |
| Area of occurrence | Schelde basin. |
| Type locality | Floodplain of the River Schelde near Weert, Bornem, Lambert-coordinates: x= 137650, y= 199075. |
| Alternative names | |
| Authors | Bogemans, F., Kiden, P., Huybrechts, W., Notebaert, B., Beerten, K., Lanckacker, T., Rixhon, G. & Heyvaert, V. |
| Date | 01/01/2017 |
| Cite as | Bogemans, F., Kiden, P., Huybrechts, W., Notebaert, B., Beerten, K., Lanckacker, T., Rixhon, G. & Heyvaert, V., 2017. The Weert Member, 01/01/2017. National Commission for Stratigraphy Belgium. http://ncs.naturalsciences.be/lithostratigraphy/Weert-Member |
