| 1. | At the top left is a distinct phenocryst of plagioclase . ]]
|
| 2. | Three types of rocks are distinguished by texture and mineral and phenocryst content.
|
| 3. | Olivine may also be a phenocryst, and when present, may have rims of pigeonite.
|
| 4. | Complex phenocryst assemblages found in a sample indicate that the magma formation is a complex process.
|
| 5. | Calc-alkaline phenocryst-rich dacite, andesite and rhyolite rocks are abundant in continental arc.
|
| 6. | Phenocryst composition in the rocks varies, encompassing olivine, orthopyroxene, plagioclase and small amounts of biotite.
|
| 7. | Trachybasalts are in the form of two textural types; phenocryst-rich lava flows and fragmental flow agglomerates.
|
| 8. | A similar type of crystal is a " phenocryst ", a large crystal in an igneous rock.
|
| 9. | Aside from the lower phenocryst content, this lava is very similar to Morro Negro, another Pacana lava dome.
|
| 10. | In tholeiitic basalt, pyroxene ( augite and orthopyroxene or pigeonite ) and calcium-rich plagioclase are common phenocryst minerals.
|
मोबाइल