|
Code
|
Description
|
Size (mm)
|
|---|---|---|
| Grain size: | ||
| G | Glassy |
|
| cx | Cryptocrystalline | <0.1 |
| µx | Microcrystalline | 0.1-0.2 |
| fg | Fine | 0.2-1 |
| mg | Medium | 1-5 |
| c | Coarse | 5-30 |
| p | Pegmatitic | >30 |
|
|
ND | Not determined |
| Contact type: | ||
| nr | Not recovered |
|
| C | Chilled margin—lava surface |
|
| I | Chilled margin—intrusive |
|
| T | Tectonic |
|
| GS | Gradational change in grain size |
|
| Mineral name: | ||
| ol | Olivine |
|
| pl | Plagioclase |
|
| cpx | Clinopyroxene |
|
| opx | Orthopyroxene |
|
| di | Diopside |
|
| aug | Augite |
|
| pig | Pigeonite |
|
| hyp | Hypersthene |
|
| sp | Spinel |
|
| ox | Fe-Ti oxide |
|
| py | Pyrite |
|
| Contact form: | ||
| P | Planar |
|
| C | Curved |
|
| I | Irregular |
|
| S | Sheared |
|
| Rock type: | ||
| Pillow basalt |
|
|
| Flow margins |
|
|
| Sheet flows |
|
|
| Massive flow |
|
|
| Dike |
|
|
| Breccia |
|
|
| Pillow breccia |
|
|
| Hyaloclastite |
|
|