Noun:

নিম্নদেশে স্থাপিত বস্তু,

underclay's Usage Examples:

of different names, such as underclay, fireclay, flint clay, and ganister can be applied to a specific seatearth.

(especially flint clays) are mined at depth, found as a seatearth, the underclay associated with coal measures.

5) coal bed or at the bottom of the underclay or shale bed below this coal measure.

5 to 4 meter) underclay found immediately below the coal.

immediately underlying coal seams, often called either "seatearth" or "underclay", typically either consists of or contains a paleosol.

Thin coal seam with underclay pervasively churned by roots as cored from the Lower Cretaceous (Berriasian to lower Valanginian) Hibernia Formation at.