Cornbrash Formation
E934198
The Cornbrash Formation is a Middle Jurassic limestone and marl unit in England known for its rich marine fossil assemblages and use in regional stratigraphic correlation.
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
geologic formation
ⓘ
lithostratigraphic unit ⓘ |
| age | Bathonian ⓘ |
| biostratigraphy | ammonite zonation ⓘ |
| contains |
oolitic limestone beds
ⓘ
shell debris ⓘ |
| country |
England
ⓘ
United Kingdom ⓘ |
| diagenesis | partly nodular ⓘ |
| economicUse |
aggregate
ⓘ
local building stone ⓘ |
| environmentOfDeposition | shallow marine ⓘ |
| exposedAt |
Cotswolds
NERFINISHED
ⓘ
Lincolnshire NERFINISHED ⓘ Northamptonshire NERFINISHED ⓘ |
| facies | bioclastic limestone ⓘ |
| fossilType |
ammonites
ⓘ
bivalves ⓘ brachiopods ⓘ echinoderms ⓘ |
| geologicPeriod | Middle Jurassic NERFINISHED ⓘ |
| governingBody | British Geological Survey NERFINISHED ⓘ |
| hasFossil |
Gryphaea
NERFINISHED
ⓘ
Rhynchonellid brachiopods ⓘ Terebratulid brachiopods ⓘ cardioceratid ammonites ⓘ |
| knownFor | rich marine fossil assemblages ⓘ |
| lithology |
limestone
ⓘ
marl ⓘ |
| mappedIn | British Geological Survey maps ⓘ |
| maximumThickness | about 10 metres ⓘ |
| memberOf | Great Oolite Group NERFINISHED ⓘ |
| namedFor | cornbrash (local term for rubbly limestone used as soil conditioner) ⓘ |
| overlies | Kellaways Formation NERFINISHED ⓘ |
| paleogeography | epicontinental sea ⓘ |
| partOf | Jurassic System NERFINISHED ⓘ |
| primaryColor | brown ⓘ |
| region |
central England
ⓘ
southern England NERFINISHED ⓘ |
| stratigraphicRank | formation ⓘ |
| stratigraphicUse | marker horizon in Middle Jurassic of England ⓘ |
| texture | rubbley limestone ⓘ |
| thickness | typically 3–8 metres ⓘ |
| underlies | Oxford Clay Formation NERFINISHED ⓘ |
| usedFor | regional stratigraphic correlation ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.