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FOREIGN. Ungulite or Obolus grit of Russia. BRITISH. Tremadoc slates. FOREIGN. "Primordial" zone of Bohemia in part, with trilobites of the genera Paradoxides, etc. BRITISH. Menevian beds of Wales, with Paradoxides Davidis, etc. FOREIGN. Lower portion of Barrande's "Primordial" zone in Bohemia. BRITISH. Fundamental gneiss of the Hebrides? FOREIGN. Labradorite series north of the river St.
These beds, which are palaeontologically the equivalents of Barrande's primordial zone, are represented by more than 5000 feet of strata, and have been studied chiefly in the neighbourhood of Dolgelly, Ffestiniog, and Portmadoc in North Wales, and at St. David's in South Wales.
The term primordial was intended to express M. Barrande's own belief that the fossils of the rocks so-called afforded evidence of the first appearance of vital phenomena on this planet, and that consequently no fossiliferous strata of older date would or could ever be discovered.
We should not forget that only a small portion of the world is known with accuracy. M. Barrande has lately added another and lower stage to the Silurian system, abounding with new and peculiar species. Traces of life have been detected in the Longmynd beds, beneath Barrande's so-called primordial zone.
We should not forget that only a small portion of the world is known with accuracy. M. Barrande has lately added another and lower stage to the Silurian system, abounding with new and peculiar species. Traces of life have been detected in the Longmynd beds beneath Barrande's so-called primordial zone.
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