Nta ntawm Semi-crystalline effect
Cov phenocrysts hauv cov qauv ib nrab crystalline feem ntau yog crystallized hauv av lossis thaum lub sij hawm nce ntawm magma, thiab cov nplais muaj qhov ntxhib. Magma nqa cov tshuaj phenocrysts mus rau qis ib feem ntawm lub ntiaj teb' cov tawv ntoo los yog tshem tawm ntawm lub ntiaj teb' saum npoo. Unconsolidated magma nrawm nrawm rau hauv vitreous matrix. Tib lub sijhawm, qee qhov crystallites thiab cryptocrystals kuj tseem tuaj yeem tsim.