Linked from
The 13 pages that link to Goethite, each with the reason it gives.
Iron oreBroader topic: Goethite is a common component of hydrated, weathered iron ores.
Oxidation zoneBroader topic: Goethite can accumulate as iron-bearing sulfides break down.
RustBroader topic: It is a common crystalline component of weathering rust.
Earth pigmentBroader topic: Goethite is a frequent source of yellow earth pigment.