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  2. Purbeck stone - Wikipedia

    en.wikipedia.org/wiki/Purbeck_stone

    The dark colour of the Purbeck Marble meant that it was used for its decorative quality in churches and cathedrals across England, particularly for items such as fonts, tombs, flooring and shafts. [1] A 1.5-tonne block of Purbeck stone was set at the entrance to Shitterton, Dorset since 2010 in an effort to deter theft.

  3. List of largest monoliths - Wikipedia

    en.wikipedia.org/wiki/List_of_largest_monoliths

    Monolith with bull, fox, and crane in low relief at Göbekli Tepe. The density of most stone is between 2 and 3 tons per cubic meter. Basalt weighs about 2.8 to 3.0 tons per cubic meter; granite averages about 2.75 metric tons per cubic meter; limestone, 2.7 metric tons per cubic meter; sandstone or marble, 2.5 tons per cubic meter.

  4. Leitrim Group - Wikipedia

    en.wikipedia.org/wiki/Leitrim_Group

    The Leitrim Group is a lithostratigraphical term coined to refer to the succession of rock strata which occur in Northern Ireland within the Visean and Namurian stages of the Carboniferous Period. [1] The group disconformably overlies the Dartry Limestone of the Tyrone Group.

  5. Breccia - Wikipedia

    en.wikipedia.org/wiki/Breccia

    Breccia is composed of coarse rock fragments held together by cement or a fine-grained matrix. [5] Like conglomerate, breccia contains at least 30 percent of gravel-sized particles (particles over 2mm in size), but it is distinguished from conglomerate because the rock fragments have sharp edges that have not been worn down. [6]

  6. Foundation Stone - Wikipedia

    en.wikipedia.org/wiki/Foundation_Stone

    1859 watercolor of the Foundation Stone by Carl Haag. Although the rock is part of the surrounding 90 million-year-old, Upper Turonian Stage, Late Cretaceous karsted limestone, [citation needed] the southern side forms a ledge, with a gap between it and the surrounding ground; a set of steps currently uses this gap to provide access from the Dome of the Rock to the Well of Souls beneath it.

  7. Limestone - Wikipedia

    en.wikipedia.org/wiki/Limestone

    [4] [3] The remaining carbonate rock is mostly dolomite, a closely related rock, which contains a high percentage of the mineral dolomite, CaMg(CO 3) 2. Magnesian limestone is an obsolete and poorly-defined term used variously for dolomite, for limestone containing significant dolomite ( dolomitic limestone ), or for any other limestone ...