Sandstone (FR.22.0006)
Find location
- Rock determination
- Sedimentary rock > Siliciclastic > Sandstone > Calcareous sandstone
- Chronostratigraphy
- Phanerozoic; Mesozoic; Jurassic; Upper Jurassic
- Lithostratigraphy
- Grès de la Crèche Formation
- Rock name
- Boulonnais calcareous sandstone
- Rock synonyms
- grès bâtard; faux grès; grès Portlandien; pierre de Boulogne
- Additional information
- Age: Tithonian/Kimmerdgian
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
- yellowish grey to beige
- Components
- white fossil shell debris; minute clasts of fossil charcoal; calcareous cement; sandy matrix
- Texture
- fine to medium
- Structure
- Weathering
- patina
- Diagnostic features
- Additional information
- NFR B9
- Flepostore inventory nr.
- ARCH3.L1.A4
- Original inventory nr.
- 40615
- Collection
- Archaeological Department, Ghent University
- Type
- Covered thin section
- Comparable thin section(s)
- Components
- dominant monocrystalline and polycrystalline quartz, lithic fragments (quartzite and weathered rocks), rare glauconite. Bioclasts: numerous longitudinal shell fragments, rare echinoderm fragments. Rare micritic ooids, small rounded intraclasts of micritic limestone (mudstone). Frequent irregular fragments of black charcoal. Poekilotopic calcite cement.
- Texture
- Badly to medium sorted, subrounded to subangular sand grains. Grain size: fine: 60-200 microns
- Structure
- preferential orientation of longitudinal shell fragments and phosphate grains.
- Weathering
- Diagnostic features
- calcareous sandstone with poekilotopic calcite, numerous shell debris and conspicuous black charcoal fragments
- Additional information
- Sample type
- Rock sample
- Inventory number
- FR.22.0006
- Collection
- Archaeological Department, Ghent University
- Donating institute/person
- Host collection
- Other samples available
- Yes
- Sample collection method
- Field Sampling (clay/rock)
Debonne & Dreesen 2015
- Full reference
-
Debonne V. & Dreesen R. 2015. Stenen immigranten in de Zwinstreek. Natuursteen in de Onze -Lieve-Vrouwhemelvaartkerk in Damme. Relicta 12: 149-180.
- File
- Link
Cite this page as: Flepostore - https://flepostore.ugent.be/rock/fr-22-0006
Last modified: 2024-04-23.