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Portland taşı

Londra, Whitehall'da bulunan, Portland taşından yapılmış bir anıt mezar.
Isle of Portland'da bulunan Portland taşı taş ocağı

Portland taşı, Portland Adası, Dorset taş ocaklarından çıkarılan, Jura Devri'nin Tithonian evresinden bir kireçtaşıdır. Taş ocakları, beyaz-gri kireçtaşı yataklarının chert yataklarından ayrılmasından oluşur. Yaygın olarak Britanya adalarında, özellikle de Londra'daki St Paul Katedrali ve Buckingham Sarayı gibi önemli kamu binalarında yapı taşı olarak kullanılmıştır. Ayrıca birçok ülkeye ihraç edilmiştir. Örneğin New York şehrindeki Birleşmiş Milletler Genel Merkezi binasında Portland taşı kullanılmıştır.

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Portland taşı
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