Parmachok

Parmachok, chohi mudavvarest, ki ba vositai dastgohi makhsusi parma khafr shuda, besh az 5 metr chuquri va 75—390 millimetr diametr dorad. Parmachoq mustaqim va moil meshavad. Parmachoq az dahoni chokh, qar va tanai on iborat ast.

Holo amiqtarin Parmachoq dar nimjazirai Ko­la besh az 11 kilometr chuquri dorad, minbad juqurii Parmachohho az in ham ziyod khohad shud. Yakchand navi Parmachoq mavjud ast: intishofi (baroi koftukovi sarvathoi zerizamini), istifo­dabari (istikhroji neftu gaz, obhoi zerizamini va gayra), yorirason, makhsus, tarkonish va gayra