Limestone (BE.24.0018)

Hand specimen pictures (macro & binocular)

Thin section pictures

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Rock determination
Sedimentary rock > Biochemical > Carbonate rock > Limestone > Sandy limestone
Chronostratigraphy
Phanerozoic; Cenozoic; Paleogene; Eocene; Lutetian
Lithostratigraphy
Zenne GroupLede Formation
Rock name
Lede stone
Rock synonyms
Balegem(-se) stone; Ledia(a)n(se) stone; Dender stone; witte arduin/Vlaamse arduin
Additional information

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Site type
Quarry
Location
Belgium; Oost-Vlaanderen; Erpe-Mere
Site name
Bambrugge, Steenberg
Excavation or Survey Team
Prof. Dr. Tim Dekock
Additional contextual information
Old quarry
Natural color
fresh surface: pale yellow to greenish yellow; pale to light grey when slightly weathered
Aged color
ochre-like to brown
Components
consists of a quartz fraction together with other detrital glauconite grains and carbonate
allochems with a calcite matrix/cement; varying cementation degree; characteristic macrofossils are Nummulites variolarius and Ditrupa strangulata (tubular fossils); cast of Turritella gastropod
Texture
siliclastic composition is dominated by a bimodal quartz population (up to 40 vol.%) of subangular very fine sand supplemented with rounded medium sized sand
Structure
layered with fossil-rich horizons (lumachelle layers)
Weathering
when exposed to the atmosphere, an ochre-like patina is formed (oxidation of glauconite and iron rich carbonates); gypsum crust formation (not applicable for this sample)
Diagnostic features
characteristic macrofossils; ochre-like patina; bimodal quartz grain size distribution (some quartz granules of up to 1-3 mm)
Additional information
pictures show dry and whet surfaces
Flepostore inventory nr.
GEOL1.L1.A2
Original inventory nr.
A0148
Collection
Geological Department, Ghent University
Type
Covered thin section
Comparable thin section(s)
Components
siliciclastic fraction (mainly quartz and to a lesser extent glauconite), fragments of microfossils (e.g. Foraminifera) besides the characteristic macrofossils (Nummulites variolarius and Ditrupa strangulata); iron-rich micritic to coarse sparitic cement; substantial silt and clay fraction
Texture
both sub-angular and rounded quartz grains; bimodal grain size distribution (very fine-medium); rounded glauconite grains
Structure
Weathering
Diagnostic features
sandy limestone to calcareous sandstone; bimodal quartz grains (very fine - medium); Nummulites variolarius
Additional information
blue stained epoxy
Sample type
Rock sample
Inventory number
BE.24.0018
Collection
Geological Department, Ghent University
Donating institute/person
Host collection
Other samples available
No
Sample collection method
Field Sampling (clay/rock)

De Kock 2016

Full reference

De Kock T. 2016. The properties and performance of Lede stone in cultural heritage: new insights for its preservation and replacement. Unpublished Phd Thesis, Universiteit Gent. Gent.

Link

De Kock et al. 2015

Full reference

De Kock T., Boone M., Dewanckele J., De Ceukelaire M. & Cnudde V. 2015. Lede Stone: A potential “Global Heritage Stone Resource” from Belgium. Episodes 38, 2: 91-96.

Link

Laga et al. 2001

Full reference

Laga P., Louwye S. & Geets S. 2001. Paleogene and Neogene lithostratigraphic units (Belgium). Geologica Belgica 4, 1-2: 135-152.

Link
Cite this page as: Flepostore - https://flepostore.ugent.be/rock/be-24-0018
Last modified: 2024-03-28.