Materials used for construction - S. Farooq, Dept of Geology AMU
The most durable building stones used both as aggregate and dimension ... industry are clay, chalk and lizenithne for cement making, brick clay, gypsum, and slate. ... crushed basalt, dolerite, fine granite, greywacke, quartzite, hornfels, flint etc., .... to the portion selected, both gigantic blocks for pillars from one part and thin,...