tatanan
picrite punika nggoleki-grained, hard rock kang jinis metasomatite, ateges ngrubah basalt. iku formulir karo utawa tanpa crystallization, salah siji ngisor permukaan minangka rocks intrusive utawa ing lumahing minangka rocks extrusive.
  
Schist kawangun dening metamorphism dinamis ing dhuwur Suhu lan tekanan sing aligns pari-parian saka mica, hornblende lan mineral elongated liyane menyang lapisan lancip.
  
komposisi
  
  
isi Mineral
biotite, olivine, plagioclase, pyrrhotite
  
alusite, amphibole, biotite, chlorite, epidote, Feldspar, garnet, grafit, hornblade, kyanite, micas, muscovite utawa illite, porphyroblasts, quartz, sillimanite, staurolite, talc
  
senyawa isi
al, cao, karbon dioksida, mg, MgO
  
cao, karbon dioksida, MgO
  
transformasi
  
  
metamorphism
Yes
  
No
  
jinis metamorphism
metamorphism kakubur, metamorphism cataclastic, impact metamorphism, metamorphism regional
  
ora ditrapake
  
cuaca
Yes
  
Yes
  
jinis udan
udan biologi
  
udan biologi, udan kimia, udan mechanical
  
erosi
Yes
  
Yes
  
jinis erosi
erosi kimia, erosi gisik, erosi Glacier, erosi segara, banyu erosi, angin erosi
  
erosi kimia, erosi gisik, erosi Glacier