Limestone (GB.24.0014)
- Rock determination
- Sedimentary rock > Biochemical > Carbonate rock > Limestone > Oolithic limestone
- Chronostratigraphy
- Phanerozoic; Mesozoic; Jurassic; Upper Jurassic; Tithonian
- Lithostratigraphy
- Portland Stone Formation
- Rock name
- Portland stone
- Rock synonyms
- commercial names: Portland Roach, Portland Whitbed, Portland Basebed
- Additional information
- Upper Tithonian Stage
Find location
- Site type
- Quarry
- Location
- the United Kingdom of Great Britain and Northern Ireland; Dorset; Portland
- Site name
- Portland (undefined quarry)
- Excavation or Survey Team
- Additional contextual information
- commercial Beltrami rock sample, from a undefined quarry situated on the Isle of Portland
- Natural color
- cream white to grey
- Aged color
- white patina
- Components
- oolithic limestone; from fine grained with small shells to very porous with centimetric gastropod molds
- Texture
- Structure
- homogeneous
- Weathering
- Diagnostic features
- Additional information
- Portland whitbed (open structure, numerous macrofossils), Portland basebed (fine and more closed structure, less macrofossils), Portland roach (coarse and more open structure, small and large (partially open) macrofossils)
- Flepostore inventory nr.
- GEOL1.L1.C21
- Original inventory nr.
- 33455
- Collection
- Geological Department, Ghent University
- Type
- Covered thin section
- Comparable thin section(s)
- Components
- ooids and bioclasts (including fragments of molluscs, corals); occasionally detrital quartz as nucleus of ooids; micrite matrix; intergranular porosity
- Texture
- medium grained allochems, moderately sorted; sub-angular quartz
- Structure
- compaction of grains (fitting grains)
- Weathering
- Diagnostic features
- medium grained oolithic packstone; occasionaly detrital quartz as nucleus of ooids
- Additional information
- Sample type
- Rock sample
- Inventory number
- GB.24.0014
- Collection
- Geological Department, Ghent University
- Donating institute/person
- Host collection
- Other samples available
- No
- Sample collection method
- Field Sampling (clay/rock)
Hughes et al. 2013
- Full reference
-
Hughes T., Lott G.K., Poultney M.J. & Cooper B.J. 2013. Portland Stone: A nomination for "Global Heritage Stone Resource" from the United Kingdom. EPISODES: Journal of International Geoscience 36, 3: 221-226.
- Link
Cite this page as: Flepostore - https://flepostore.ugent.be/rock/gb-24-0014
Last modified: 2024-04-29.