(Q3399326)
Statements
1 reference
Identifiers
0 references
Sitelinks
Wikipedia(2 entries)
- enwiki Portland Group (geology)
- frwiki Portlandien
Late Jurassic (Tithonian) lithostratigraphic group (a sequence of rock strata) in South East England (is derived from the Isle of Portland in Dorset where the strata are exposed and have been extensively worked)