Petrography and Physicomechanical Properties of Rocks from the Ambela Granitic Complex, NW Pakistan

Table 3

Comparison of petrographic characteristics of the studied rocks.

Rock type	Megaporphyritic alkali granite	Microporphyritic alkali granite	Megaporphyritic alkali quartz syenite	Nepheline syenite
Phenocryst grain size	Very coarse grained	Medium grained	Very coarse grained	Medium grained
Groundmass grain size	Fine	Fine	Very fine	Fine
Phenocryst modal abundance	90%	90%	60%	50%
Phenocryst shape	Regular to irregular	Regular to irregular	Highly irregular	Irregular