phosphatic nodule

phosphatic nodule

[fä′sfad·ik ′naj·yül]
(geology)
A dark, usually black, earthy mass or pebble of variable size and shape, having a hard shiny surface and occurring in marine strata.
References in periodicals archive ?
Phosphatic nodules in black and green shale and sandstone of Mughalkot formation of Gharwandi (Alu Khan Kach) and other areas of eastern Sulaiman foldbelt have been found.
Phosphatic nodules in Late Cretaceous Mughalkot formation near Indus Suture in Kurgil area of Karim Kach River are found.