Oldhamia sentence example

oldhamia
  • Certain markings on slates and sandstones, such as the "fucoids" of Scandinavia and Scotland, the Phycoides of the Fichtelgebirge, Eophyton and other seaweed-like impressions, may indeed be the casts of fucoid plants; but it is by no means sure that many of them are not mere inorganic imitative markings or the tracks or casts of worms. Oldhamia, a delicate branching body, abundant in the Cambrian of the south-east of Ireland, is probably a calcareous alga, but its precise nature has not been satisfactorily determined.
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  • The radial or fan-shaped markings known as Oldhamia were first detected in this series, but are now known from Cambrian beds in otter countries; in default of other satisfactory fossils, the series of Bray and Howth has long been held to be Cambrian.
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