FASIYa dar geologiya

FASIYa (az lotini Fasies — ruy, simo), dar geologiya, mafhumest, ki digargunihoi tarkibi litologii jinshoi kuhi va boqimondahoi organikii onhoro dar hududi yak qabati stratigrafi ifoda mekunad. Istilohi «Fasiya»-ro geologi shveysari A. Gresli dar ilm jori namud (1835 —41) Mafhumi Fasiya dar litologiya ba du mano istifoda meshavad: 1) Fasiya jinsi kuhist, ki dar sharoiti muayyan paydo meshavad; 2) Fasiya sharoiti takhshinhosilshavi (hozira yo qadimi), ki az tahshin yo jins iborat ast. In har du manoi Fasiya ba ham khele nazdik buda, yakdigarro purra mekunand.
Aksar vaqt mafhumi Fasiya sharoithoero, ki dar marhilahoi gunogunn jarayoni tahshinshavi — litogenea joy dorand, ifoda menamoyad; masalan, hangomi tadqiqi marhilai farsoish mafhumi «Fasiyai qishri farsoish», mavridi omukhtani marhilai ba jins tabdil yoftani tahshinho «Fasiyai diagenez» va hangomi omukhtani tagyiroti minbadai jinshoi tahshinii kayho tashakkulyofta ‘ mafhumi «Fasiyai epigenez» kor farmuda meshavad.