synchroneity Chiefly Geol.
(sɪŋkrəˈniːɪtɪ, -ˈneɪɪtɪ)
[f. synchronous a. + -eity, after simultaneity, spontaneity, etc.]
= synchronism 1 a.
| 1909 Cent. Dict. Suppl., Synchroneity, synchronism; the character or fact of being synchronous; specifically, in geol., supposed synchronism in time of deposition of strata. 1945 Bull. Amer. Assoc. Petroleum Geologists XXIX. 427 Facts bearing on synchroneity. 1968 R. G. West Pleistocene Geol. & Biol. xii. 286 There remain very many problems of chronology, in particular the synchroneity of pollen zones. 1979 Nature 11 Oct. 431/1 Their data indicate an approximate synchroneity of dinosaur and foram extinctions just below anomaly 29, the maximum error being about 100,000 years. |