Alkali feldspar granite Alkali feldspar granite Alkali feldspar granite, some varieties of which are called 'red granite', is a felsic igneous rock and a type of granite rich in the mineral potassium feldspar (K-spar). It is a dense rock with a phaneritic texture. The abundance of K-spar gives the rock a predominant pink to reddish hue; peppered with minor amounts of black minerals. As shown in the QAPF diagram, alkali feldspar granite contains between 20% - 60% quartz. Less quartz content would lead to "quartz alkali feldspar syenite". More than 90% of the total feldspar content is in the form of alkali feldspar.
Kokerbin Rock the summit are accessible by marked bush walks. The rock formations include a wave rock formation, Dog Rock and Devil's Marbles. On the western side of Kokerbin Rock is a historic stone well and an old school site, remainders of early European settlement. <mapframe text="Kokerbin Rock is located within the Kokerbin Nature Reserve" width=300 height=300 zoom=15 latitude=-31.88772 longitude=117.70484>{ "type": "ExternalData", "service": "geoshape", "ids": "Q16893567", }</mapframe> Kokerbin Rock Kokerbin Rock, also known as Kokerbin Hill, is a granite rock formation located within the Kokerbin Nature Reserve in the Wheatbelt region of Western Australia. The area has special significance for Noonga. There