£1.73 – £3.68 ex VAT
Travertine is a form of limestone which has been precipitated from carbonate rich hot springs. These examples are from Yorkshire, UK and are supplied in a labelled card tray.
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Travertine is a form of limestone deposited by mineral rich springs, especially hot springs. Travertine often has a fibrous or concentric banded appearance. It is formed by the rapid precipitation of calcium carbonate, often at the margins of a hot spring or in a limestone caves. Here it can give rise to the usual cave features. It tends to be much more dense & compact than it’s porous counterpart, Tufa. Travertine is normal white or buff in colour but can range through to orange & brown. It is extracted & used as a decorative stone e.g. tiles. Pamukkale in Turkey (Unesco World Heritage Site) is a spectacular example of travertine terraces. These particular samples are from Yorkshire, UK. Each specimen is supplied in a labelled card tray.
2" x 2", 3" x 2", 4" x 3"
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Travertine thin section slide. Travertine is a form of limestone deposited by mineral rich springs, especially hot springs. It is formed by the rapid precipitation of calcium carbonate, often at the margins of a hot spring or in a limestone caves.
6 in stock
Tufa rock specimens which are calcium carbonate rich, sponge-like rock with fossil remains. Believed to be from the Quaternary period, particularly, the Flandrian epoch the specimens come from Caerwys, North Wales. Available in various sizes and supplied in a card tray with labels.
29 in stock
This is a rare & unusual rock, part of the highly studied Zechstein Formation. It is a concretionary Magnesium Limestone of Permian age, supplied in a 1.5″ x 1.5″ magnification box.
13 in stock
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
Salt Pseudomorphs on a limy marl matrix collected from the Triassic Aust Cliff in Avon. Numerous cubic imprints can be identified on the limy marl substrate of these specimens; they serve as interesting educational pieces.
20 in stock
Dark grey Shale from the Jurassic of the Yorkshire coast. Originally deposited in a deep water marine environment. Occasionally fossiliferous.
199 in stock
Lignite or Brown Coal is a naturally compressed peat deposit. Lower grade than traditional coals & younger in age, in this case from the Miocene in Germany.
98 in stock
This Breccia is a calcrete cemented scree deposit of Pleistocene age from the Manifold Valley in Staffordshire.
40 in stock
Banded mudstone, know locally as the Moughton Whetstone from the Silurian deposits Crummackdale, West Yorkshire.
20 in stock
Purbeck limestone (also known as Purbeck marble) is a fossiliferous carbonate rock found on the Isle of Purbeck in Dorset. UK. Upper Jurassic to Lower Cretaceous in age. Available in a variety of sizes.
200 in stock
Stiperstones Orthoquartzite from the Cambrian period. A very pure, hard, well cemented sandstone. It is normally whitish or pale grey-buff in colour with occasional streaks of impurities. Available in card trays with labels.
Out of stock
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.
200 in stock
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.
48 in stock
Another variation of shelly limestone. This specimen also includes oolites along with fossil shell fragments. The specimens are a pale cream colour and available in card trays with a label.
50 in stock