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There are two main types of sedimentary stone used in masonry work, limestone and ______________

(a) limestone

(b) gravel

(c) sandstones

(d) marble

This question was posed to me at a job interview.

Query is from Brickwork, Woodwork and Stone Masonry topic in chapter Rules and Methods of Measurement of Civil Engineering Drawing

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The correct option is (c) sandstones

The explanation: Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) mineral particles or rock fragments. Most sandstone is composed of quartz or feldspar because they are the most resistant minerals to weathering processes at the Earth’s surface, as seen in Bowen’s reaction series.

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