Definition of septarium in English:
septarium
nounPlural septaria sɛpˈtɛːrɪəmˌsepˈterēəm
Geology A concretionary nodule, typically of ironstone, having radial cracks filled with calcite or another mineral.
Example sentencesExamples
- Dolostone septaria and iron sulfide nodules occur in the Late Devonian Huron Shale.
- Phosphatic nodules, large dolostone septaria, iron sulfide nodules, and crystal-lined vugs are present.
- Iron oxide nodules are commonly septaria, exhibiting networks of thin veins of coarsely granular calcite.
- Matrix minerals of the dolostone septaria are ferroan dolomite, quartz, calcite, and pyrite.
- Large dolostone septaria and iron sulfide nodules occur in the Late Devonian Huron Shale.
Derivatives
adjective
Geology Polygonal septarian cracks are filled with sparry calcite cements or micrite matrix.
Example sentencesExamples
- Consequently, they are only readily detected in septarian cracks and vugs that show an incomplete paragenesis.
- The areas along fault planes were subjected to a shearing action that produced a pattern of fracturing that is different from the desiccation cracking of a normal septarian concretion.
- On Thursday, the group moved to Moeraki, home of the famous ‘Moeraki boulders,’ large septarian nodules that weather out of the cliffs.
- These are found rarely in large septarian concretions in the Huron Shale in north-central Ohio near Milan, in Huron County.
Origin
Late 18th century: modern Latin, from Latin septum 'enclosure'.