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.
  
ignimbrites sing kawangun saka dicampur banget lingkungan diurutake saka awu vulkanik utawa tuff lan pumice lapilli, umum karo pecahan lithic kasebar.
  
komposisi
  
  
isi Mineral
biotite, olivine, plagioclase, pyrrhotite
  
apatite, biotite, kalsit, chlorite, Feldspar, hematite, hornblade, ilmenite, magnetite, olivine, pyroxene, quartz
  
senyawa isi
al, cao, karbon dioksida, mg, MgO
  
ca, NaCl
  
transformasi
  
  
metamorphism
Yes
  
Yes
  
jinis metamorphism
metamorphism kakubur, metamorphism cataclastic, impact metamorphism, metamorphism regional
  
metamorphism kakubur, kontak metamorphism, hidrotermal metamorphism, impact metamorphism, metamorphism regional
  
cuaca
Yes
  
Yes
  
jinis udan
udan biologi
  
udan biologi, udan kimia
  
erosi
Yes
  
Yes
  
jinis erosi
erosi kimia, erosi gisik, erosi Glacier, erosi segara, banyu erosi, angin erosi
  
erosi kimia, erosi gisik