Figure 17--Framework grains of quartz (Q), plagioclase (P), other feldspar (F), and minor glauconite (G) along with good porosity (Ps) (blue) in Pulai-II sandstone. Glauconite and plagioclase are altered, with the latter showing microporosity. Bekok-1, 1890.1 m msl. Plane light. Scale bar = 0.10 mm.