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Walter R. Kellogg


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Mineral Specimen #4928    Cotham Marble (Cotham Stone, Landscape Marble) - Stromatolitic Limestone (Fossil Algae)

Cotham formation, Penarth group, Triassic period, southwestern England near Bristol

17.6 x 6.2 x 0.5 cm


A polished slab of polished limestone which bears several names and has been used as a decorative stone for some time in England. The landscape depicted is said to resemble trees and hedges growing from plowed fields. The patterns are caused by stromatolites 9fossil algae). Although the location listed for most specimens of this material is listed as Cotahm, which is a suburb and council ward of the city of Bristol, The material is found as lenses found intermittently within the Cotham Formation in outcrops extending from Glamorgan in South Wales through the Bristol area and extending to the southeastern coast of Devon. A plaque has been glued onto the unpolished, bak side of the specimen.

Condition: Good

Flaws: There are several small white spots which are fractured.

This mineral is also found in the following galleries: Minerals From Europe | Carbonates | Polished & Worked | Minerals Priced Between 50 and 99 Dollars