Ferrar Dolerite
E653121
Ferrar Dolerite is a widespread Jurassic-age igneous rock formation in Antarctica, notable for forming prominent sills and cliffs within the Transantarctic Mountains.
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
dolerite
ⓘ
igneous rock formation ⓘ mafic intrusive rock ⓘ |
| ageRange | Early Jurassic ⓘ |
| approximateAgeMa | 183 ⓘ |
| associatedWith |
Jurassic magmatism in Antarctica
ⓘ
breakup of Gondwana ⓘ |
| composition |
Fe-Ti oxides
ⓘ
clinopyroxene ⓘ orthopyroxene ⓘ plagioclase feldspar ⓘ |
| country | Antarctica NERFINISHED ⓘ |
| discoveredBy | early Antarctic explorers and geologists in the Transantarctic Mountains ⓘ |
| distribution | widespread along Transantarctic Mountains ⓘ |
| emplacementStyle |
dike swarm
ⓘ
sill complex ⓘ |
| exposedIn | Transantarctic Mountains NERFINISHED ⓘ |
| forms |
cliffs
ⓘ
dikes ⓘ sills ⓘ |
| geologicAge | Jurassic NERFINISHED ⓘ |
| hostRocks | Beacon Supergroup NERFINISHED ⓘ |
| lithology | dolerite ⓘ |
| locatedIn | Antarctica ⓘ |
| magmaticAffinity | tholeiitic basaltic ⓘ |
| namedAfter | Ferrar Glacier region NERFINISHED ⓘ |
| notableExposure |
McMurdo Dry Valleys
NERFINISHED
ⓘ
Queen Alexandra Range NERFINISHED ⓘ Victoria Land NERFINISHED ⓘ |
| overlies | Beacon Supergroup sedimentary rocks ⓘ |
| partOf | Ferrar Large Igneous Province NERFINISHED ⓘ |
| relatedTo | Karoo-Ferrar Large Igneous Province NERFINISHED ⓘ |
| researchField |
Antarctic geology
ⓘ
igneous petrology ⓘ large igneous provinces ⓘ |
| significance |
important for reconstructing Gondwana breakup
ⓘ
important for studying Jurassic magmatism ⓘ key marker horizon in Transantarctic stratigraphy ⓘ |
| tectonicSetting | continental flood basalt province ⓘ |
| texture |
medium-grained
ⓘ
subophitic ⓘ |
| thickness | locally hundreds of meters ⓘ |
| underlies | Jurassic volcanic rocks in some areas ⓘ |
| weatheringExpression |
prominent escarpments
ⓘ
steep cliffs ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.