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Carstone (sometimes spelt carrstone) is a sedimentary rock which has a distinct, rusty red colour. These particular specimens found in Wesctott, Surrey formed during the Cretaceous period, a friable rock, it is iron rich, obtaining its colour from leaching. Used commonly as a building stone, the samples we have available have various size options and come supplied in a card tray with a label.
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Carstone (sometimes spelt carrstone) is the name given to an iron oxide rich variation of sandstone (known as ferruginous). It is easily identifiable due to having a deep, rusty red colouration and a very weak,friable rock texture. The colour becomes present in this sedimentary rock by leaching processes, which occur in irregular veins and is commonly a dark orange brown. At one time it was used as a source of iron ore in Surrey (Abinger Hammer) and today may be seen on old buildings, where it was used as a facing stone. However, the weak properties of this rock mean that it cannot be used for much else. These samples are Cretaceous in age, making them between 145 to 66 million years old and were found in the Lower Greensand formations of Westcott, Surrey in the UK. Specimens are available in various sizes and come supplied in a card tray with an information label. Due to the fragile nature of this rock, care is recommended when storing and handling them.
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Devonian lower Old Red Desert Sandstone from Gloucestershire available in card trays with a label.
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Cretaceous sandstone rock specimens from the Wealden group found in Philpots quarry, west Hoathly, Sussex. This sedimentary rock is formed in estuarine conditions and exhibits quartz and mica crystals, commonly used as a popular building stone.
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A fine grained sandstone formed in estuarine (river mouth) conditions, composed of fine quartz and mica.
Micaceous Sandstone. As the name suggests, this type of sandstone contains flakes of mica which can be seen glinting in the specimens.
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Pre-Cambrian Torridonian Sandstone from Loch Kishorn, Scotland. Among the oldest rocks to be found in the U.K. Named after the Torridon region of Scotland.
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Carboniferous Chert found in Lancashire supplied in a card tray with label.
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Carboniferous coral limestone from Anglesey, North Wales. Composed largely of well preserved Lithostrotion corals
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Dark grey Graptolitic Shale from Scotland or Cumbria. Contains the delicate blade-like fossils of Graptolites. These were small, colonial marine creatures. Please note that the graptolite content of these specimens is variable.
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This Breccia is a calcrete cemented scree deposit of Pleistocene age from the Manifold Valley in Staffordshire.
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Frosterley Marble is not a marble but a black limestone containing fossil coral specimens of Carboniferous age. The specimens are from Harewood quarry, Co. Durham, and come supplied in a white card tray with an information label.
60 in stock
Dolomite or Dolostone is a carbonate rock composed primarily of the mineral Dolomite.
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Conglomerate with well rounded clasts from Faringdon, UK. A good example of the lithotype as opposed to a Breccia which would contain predominantly angular to sub-angular clasts.
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Ribbon banded mudstone, Silurian in age, collected from the Denbigh grits in Wales, UK. Available in various sizes.
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Millstone Grit. A coarse grained Carboniferous (Namurian) sandstone from the North of England.
90 in stock
Specimens of fault breccia found in Great Langdale, Cumbria, UK. These specimens are fault breccia meaning that unlike other breccia they were formed by tectonic forces. Specimens are supplied in a white card tray with a information label.
Portland Limestone: a world famous building stone laid down in the Tithonian stage of the Jurassic. Collected from the Isle of Portland, Dorset. Specimens available in a range of sizes.
Out of stock
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