Granite (FI.11.0001)

Hand specimen pictures (macro & binocular)

Thin section picture

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Rock determination
Igneous rock > Intrusive > Felsic (i) > Granite
Chronostratigraphy
Precambrian
Lithostratigraphy
Rock name
Rapakivi granite
Rock synonyms
Additional information
Medieval ballast stone found near Bruges

Find location

Site type
Consumption site
Location
Belgium; West-Vlaanderen; Damme
Site name
Hoeke
Excavation or Survey Team
Prof. Dr. Wim De Clercq and Dr. Roland Dreesen
Additional contextual information

Provenance

Location
Finland
Supposed site(s) of provenance
Additional information
interpreted as a glacial erratic collected from cobble beaches in the Baltoscandian area; probably geologically originates from south(-western) Finland; more particular the Ă…land archipelago
Natural color
deep red coloured; grey and black minerals
Aged color
Components
large rounded and rimmed feldspar crystals (ovoid alkali feldspars surrounded by a rim of plagioclase); red alkali feldspar and grey plagioclase; black ferromagnesian minerals; quartz
Texture
characteristic graphic textures (exsolved quartz typically forming a distinctive repetitive pattern resembling cuneiform writing);
Structure
Weathering
Diagnostic features
Additional information
pictures of sawn sides show both dry and wet surfaces
Sample type
Tool
Artefact information
ballast stone, sample number Ho-9
Inventory number
FI.11.0001
Collection
Archaeological Department, Ghent University
Donating institute/person
Host collection
Other samples available
No
Sample collection method
Archaeological Field Survey

De Clercq et al. 2017

Full reference

De Clercq W., Dreesen  R., Dumolyn J., Leloup W. & Tracht J. 2017. Ballasting the Hanse: Baltoscandian erratic cobbles in the Later Medieval port landscape of Bruges. European Journal of Archaeology 20, 4: 710-736.

Dreesen & De Clercq 2020

Full reference

Dreesen  R. & De Clercq W. 2020. Ballaststenen en hun rol in het voormalige middeleeuwse Brugse havenlandschap. In: De Kock T., De Ceukelaire M. & Van der Star C. (Eds.). Pracht en Praal, 7e Vlaams-Nederlandse natuursteendagen, 12-13 maart 2020, Antwerpen. Professional Papers of the Geological Survey of Belgium, 318: 7-18.

Cite this page as: Flepostore - https://flepostore.ugent.be/rock/fi-11-0001
Last modified: 2024-04-16.