Yorkshire jet and its links to Pliny the Elder
Autor: | W. T. Dean |
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Rok vydání: | 2007 |
Předmět: | |
Zdroj: | Proceedings of the Yorkshire Geological Society. 56:261-265 |
ISSN: | 2041-4811 0044-0604 |
DOI: | 10.1144/pygs.56.4.261 |
Popis: | SUMMARY The mineral name jet is generally employed in western Europe for hard, fossilized coniferous wood capable of being carved and highly polished, particularly that of Early Jurassic (Toarcian) age in NE Yorkshire and geologically related areas. However, the term is derived, by way of the Old French jaiet, from the name Gagae, an ancient Greco-Roman town on the coast of south-western Turkey. Diverse properties were attributed to the mineral by ancient writers such as Pliny the Elder, and it is clear that a variety of substances has been described as jet. In the westernmost Taurus Mountains, rocks of the Gagae area belong to the Antalya Nappes and are succeeded by a Cretaceous ophiolitic unit. Associated dark volcanic rocks are not considered compatible with those for which Pliny9s term was originally employed, and interbedded, organic-rich, black layers in the Alakir Cay Unit, one of three units in the Middle Antalya Nappes, may provide a more probable candidate, though this is not certain. |
Databáze: | OpenAIRE |
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