noun. A usually pinkish or red sandstone consisting primarily of quartz and feldspar and forming from the cementation of particles generated by the rapid erosion of granite.

noun. Feldspathic sandstone; a rock consisting essentially of more or less consolidated quartzose sand with grains or particles of orthoclase disseminated through it, and frequently containing also some mica and kaolin.

noun. A sandstone derived from the disintegration of granite or gneiss, and characterized by feldspar fragments.

noun. A sedimentary rock consisting of small fragments of feldspar and quartz similar to a coarse sand.

"Uluru is composed of steeply dipping, feldspar-rich sandstone arkose and has been exposed as a result of folding, faulting, the erosion of surrounding rock and infill."

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