Yorkstone is a term for a variety of sandstone, specifically from quarries in Yorkshire that have been worked since medieval times, but now applied generally. Yorkstone is a tight grained, Carboniferous sedimentary rock.
权威例句
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The plans include re-paving the area with granite and Yorkstone, as well as adding new seating and lighting.
BBC: Salisbury Market Place
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Hambleton District Council resurfaced the entire Market Place in the early 1990's with a traditional surfacing of cobbles and Yorkstone paving - a type of sandstone.