Oaxacan Complex of Mexico
E803327
The Oaxacan Complex of Mexico is an ancient Precambrian crystalline basement terrane composed mainly of high-grade metamorphic and igneous rocks that record some of the oldest geological events in southern Mexico.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Oaxacan Complex of Mexico canonical | 1 |
Statements (42)
| Predicate | Object |
|---|---|
| instanceOf |
Precambrian terrane
ⓘ
crystalline basement terrane ⓘ |
| ageEstimate | Paleoproterozoic to Mesoproterozoic ⓘ |
| associatedWith |
Grenvillian orogeny
NERFINISHED
ⓘ
Pan-African–Brasiliano orogenic cycle NERFINISHED ⓘ |
| chronologyMethod | U-Pb zircon geochronology ⓘ |
| contains |
mafic intrusive bodies
ⓘ
orthogneiss ⓘ paragneiss ⓘ |
| country | Mexico ⓘ |
| deformationStyle | polyphase ductile deformation ⓘ |
| exposedIn |
Oaxaca region
NERFINISHED
ⓘ
Sierra Madre del Sur NERFINISHED ⓘ |
| geologicalAge | Precambrian ⓘ |
| lithology |
high-grade metamorphic rocks
ⓘ
igneous rocks ⓘ |
| locatedIn |
southern Mexico
ⓘ
state of Oaxaca NERFINISHED ⓘ |
| metamorphicGrade |
amphibolite facies
ⓘ
granulite facies ⓘ |
| metamorphicHistory | polymetamorphic ⓘ |
| overlainBy |
Cenozoic volcanic rocks
ⓘ
Mesozoic sedimentary rocks ⓘ Paleozoic sedimentary rocks ⓘ |
| partOf |
Oaxaquia microcontinent
NERFINISHED
ⓘ
basement of the Sierra Madre del Sur ⓘ |
| records |
ancient magmatic events
ⓘ
early crustal evolution of southern Mexico ⓘ high-grade metamorphism ⓘ |
| researchField |
Precambrian geology
ⓘ
tectonics of Mexico ⓘ |
| rockType |
gneiss
ⓘ
granitoid ⓘ granulite ⓘ migmatite ⓘ |
| significance |
contains some of the oldest rocks known in Mexico
ⓘ
key to reconstruction of pre-Mesozoic history of southern Mexico ⓘ |
| structuralPosition | cratonic basement beneath younger cover sequences ⓘ |
| studiedBy | geologists ⓘ |
| tectonicImportance | records assembly of Oaxaquia and adjacent terranes ⓘ |
| tectonicSetting | basement complex ⓘ |
| tectonicUnitType | basement terrane ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.