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Sample A-29a-89
NavDat sample number 48647 · TRACHYANDESITE
Sample
| Sample ID | A-29a-89 |
|---|
| Rock name | TRACHYANDESITE |
|---|
| Rock type | VOLCANIC |
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| Composition | INTERMEDIATE |
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| Material | IGNEOUS |
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| Comment | hornblendite xenolith in trachyandesite dike |
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Location
| Latitude | 47.1722 |
|---|
| Longitude | -111.683 |
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| Location | exposed 0.5 km north of Hardy Bridge |
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| State / province | Montana |
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| Volcanic field | Adel Mountain Volcanics dike |
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Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 74.74 |
|
74.32 |
75.16 |
|
|
Analyses
No chemical analyses are stored for this sample.
References
- Harlan, Stephen S; Snee, Lawrence W; Reynolds, Mitchell W; Mehnert,Harald H; Schmidt, R G; Sheriff, Steve D; Irving, Anthony J (2005) U. S. Geological Survey Professional Paper, Report: P 1696, 29 pp.,2005
