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Tufa

Shelly Siltstone

£2.62 – £3.46 ex VAT

Lignite (Brown Coal)

£1.38 – £3.48 ex VAT

£1.73 – £3.68 ex VAT

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.

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Tufa is a variety of limestone, formed by the precipitation of carbonate minerals from ambient temperature water bodies. This rock specimen is from the Quaternary period, particularly, the Flandrian epoch and comes from Caerwys, North Wales. It forms in fluvial channels or lacustrine environments & subterranian passages (dripstone, stalagmites & stalactites). Geothermally heated hot springs sometimes produce similar (but less porous) carbonate deposits known as travertine. Tufa from this deposit contains organic build-ups (phytoherms) of living vegetation, such as reed and willow, although mosses and liverworts are the most common. All have been preserved as casts and moulds. These plants have been cemented and bonded during life by freshwater carbonate precipitation. This rock specimen is a classic tufa, light in weight, spongy, and containing many plant, preserved in the rock. Samples are available in optional sizes and come supplied card tray.

Weight 120 g
Specimen Size

2" x 2", 3" x 2", 4" x 3"

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