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Sample L-1021
NavDat sample number 3877 · SYENITE
Sample
| Sample ID | L-1021 |
|---|
| Rock name | SYENITE |
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| Rock type | PLUTONIC |
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| Composition | INTERMEDIATE |
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| Material | IGNEOUS |
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| Collected by | author |
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| Comment | phenocrysts of orthoclase moderately sericitized, plagioclase; groundmass of biotite, hornblende feldspar inclusions, some alteration to biotite, quartz |
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Location
| Latitude | 47.0811 |
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| Longitude | -111.636 |
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| Location | 0.5 miles NE of Barker, Chouteau County |
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| State / province | Montana |
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| Volcanic field | Little Belt Mountains pluton |
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Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 46.1 |
|
44.8 |
47.4 |
|
|
Analyses
No chemical analyses are stored for this sample.
