Limestone (FR.24.0003)
Find location
- Rock determination
- Sedimentary rock > Biochemical > Carbonate rock > Limestone > Bioclastic limestone (coquina/lumachelles rich)
- Chronostratigraphy
- Phanerozoic; Mesozoic; Jurassic; Upper Jurassic
- Lithostratigraphy
- Argiles de Chatillon Formation
- Rock name
- Boulonnais limestone
- Rock synonyms
- Additional information
- Age: Tithonian/Kimmeridgian
Find location
- Site type
- Natural geological outcrop
- Location
- France; Pas-de-Calais; Audresselles
- Region
- Boulonnais
- Site name
- Cran Noirda
- Excavation or Survey Team
- Dr. R. Dreesen and Prof. W. De Clercq
- Additional contextual information
- This sample was collected at the foot of the coastal cliffs
- Natural color
- blue grey
- Aged color
- light grey
- Components
- thin-shelled mollusks (Exogyra virgule) and thick-shelled mollusks (a.o. Trigonia); calcareous-clay cement (marly)
- Texture
- coarse-grained (because of large shells)
- Structure
- Weathering
- Diagnostic features
- mollusk shelles
- Additional information
- NFR B5
- Flepostore inventory nr.
- ARCH3.L1.A15
- Original inventory nr.
- 40630
- Collection
- Archaeological Department, Ghent University
- Type
- Covered thin section
- Comparable thin section(s)
- Components
- numerous bioclasts (mainly pelecypods), small and larger flat phosphatic pebbles (displaying calcareous sandstone texture), fragments of charcoal. Sand fraction composed of mono- and polycrystalline quartz. Calcitic mosaic cement.
- Texture
- subrounded badly sorted sand grains. Grain size: 200-600 microns. Thin- and thick-shelled bivalves (both fibrous and prismatic textures). Size of phosphatic pebbles: 1 cm and more
- Structure
- Weathering
- Diagnostic features
- coquina with large and thick-shelled bivalves and phosphatic pebbles
- Additional information
- Sample type
- Rock sample
- Inventory number
- FR.24.0003
- Collection
- Archaeological Department, Ghent University
- Donating institute/person
- Host collection
- Other samples available
- Yes
- Sample collection method
- Field Sampling (clay/rock)
Cite this page as: Flepostore - https://flepostore.ugent.be/rock/fr-24-0003
Last modified: 2024-04-29.