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limonite
Limonite is characterized by its distinct ochre or yellow-brown hue, often associated with the weathering of other iron-bearing minerals. In a geological context, it is viewed as a secondary mineral, meaning it forms from the alteration of primary minerals like pyrite or magnetite through oxidation and hydration.
Because it is a mineral substance, it is treated as an uncountable mass noun. To refer to specific quantities or distinct samples, speakers must use partitive constructions such as a sample of limonite or a deposit of limonite.
Ý nghĩa
Ví dụ
The geologist identified the yellow-brown deposit as limonite.
Limonite is often formed by the weathering of other iron minerals.
Limonite is often formed by the weathering of other iron minerals.
Look at this sample of limonite and notice its earthy texture.
The mine produces a high grade of limonite for iron extraction.
I wonder if this streak of yellow on the rock is actually limonite.
Limonite occurs as a hydrated iron oxide in many soil types.
The ancient tools were found embedded in a layer of limonite.