Upper Triassic amber from the dolomites (northern Italy). A paleoclimatic indicator?

Citation
P. Gianolla et al., Upper Triassic amber from the dolomites (northern Italy). A paleoclimatic indicator?, RIV IT PAL, 104(3), 1998, pp. 381-389
Citations number
47
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Earth Sciences
Journal title
RIVISTA ITALIANA DI PALEONTOLOGIA E STRATIGRAFIA
ISSN journal
0035-6883 → ACNP
Volume
104
Issue
3
Year of publication
1998
Pages
381 - 389
Database
ISI
SICI code
0035-6883(199812)104:3<381:UTAFTD>2.0.ZU;2-B
Abstract
Amber in Triassic deposits in the Dolomites is demonstrated for the first t ime. The amber-bearing deposits belong to the middle part of the Durrenstei n Formation, referred to uppermost Julian (Lower Carnian, about 225 My). Ch emico-physical features of amber, which occurs as small yellow to reddish d roplets, have been determined. Infrared (IR) spectroscopy shows typical ban ds of fossil resins; the "fingerprint" region of the spectrum presents a un ique pattern that cannot be referred to any other known fossil resin. Palyn ological investigation of amber-bearing layers shows a large prevalence of bisaccates and circumpolles. Particularly, the taeniate bisaccates are freq uent: (41%) and suggest a correlation with the amber-producing species. Amb er production and preservation is possibly related to a humid climatic even t.