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Sample L-1037
NavDat sample number 3918 · DIORITE
Sample
| Sample ID | L-1037 |
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| Rock name | DIORITE |
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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 plagioclase very sericitic toward edges, hornblende fractured, with chlorite development; groundmass of orthoclase? and quartz; age thought to be unusually high for San Juan Mts volcanics and should not be accepted without confirmation |
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Location
| Latitude | 37.3853 |
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| Longitude | -108.071 |
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| Location | just S of La Plata; La Plata County |
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| State / province | Colorado |
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| Volcanic field | La Plata sill |
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Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 123 |
|
119 |
127 |
|
|
Analyses
No chemical analyses are stored for this sample.
