Borgloon Formation

The information on this page is a summary description.
The full formal description is available here: Borgloon Formation

Abbreviation Bo
Parent unit Tongeren Group
Child units Henis Member, Alden Biesen Member, Heide Bed, Kerkom Member, Boutersem Member, Hoogbutsel Bed
Lithological description The continental and lagunary deposits start in Brabant by a layer of clay lenses with erosion and emersion characteristics, followed by an alternation of sand and clay layers. It is covered by grey white or brownish, cross bedded sand, locally lignitic. In Limburg the base is formed by a thick layer of grey and green clay, covered by black lignitic clay with horizontal layers of calcareous nodules and gypsum crystals, and an alternation of clayey and sandy layers. The top is formed by white yellowish, medium to coarse sand, with a lot of shells (fragments) and alternating with 2 to 3 layers of grey white, compact clay with layers of black clay.
Age Early Oligocene.
Thickness 20 m in Brabant and 10 m in Limburg.
Area of occurrence Southern of Brabant and Limburg.
Type locality
Alternative names
Authors Laga, P., Louwye S. & Geets, S.
Date 01/01/2001
Cite as Laga, P., Louwye S. & Geets, S., 2001. The Borgloon Formation, 01/01/2001. National Commission for Stratigraphy Belgium.


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