| Description: The rock_type element identifies the type of rock the specimen is. |
| Namespace Id: speclib | Steward: geo | Class Name: Specimen_Classification | Type: UTF8_Short_String_Collapsed |
| Minimum Value: None | Maximum Value: None | Minimum Characters: 1 | Maximum Characters: 255 |
| Unit of Measure Type: None | Default Unit Id: None | Attribute Concept: None | Conceptual Domain: SHORT_STRING |
| Status: Active | Nillable: false | Pattern: None |
| Permissible Value(s) | Value | Value Meaning |
| | Igneous | The Igneous value indicates that the specimen is volatile-poor and was formed by the cooling of magma or lava. |
| | Metamorphic | The Metamorphic value indicates that the specimen was formed by metamorphic processes (e.g., increased temperature and/or pressure conditions that altered the rock composition without melting) |
| | Sedimentary | The Sedimentary value indicates that the specimen was formed by sedimentary processes (e.g., lithification of unconsolidated material, direct chemical precipitation) |
| | Unknown | The Unknown value indicates that there is not enough information about the specimen to assign it a rock type |