The Eocene expansion of nautilids to high latitudes
- 作者：Dzik ; Jerzy ; Gazdzicki ; Andrzej
- 关键词：Nautilids ; Seymour Island ; Antarctica ; Eocene ; Bathymetry
- 刊名：Palaeogeography ; Palaeoclimatology ; Palaeoecology
- 出版年：2001
- 期刊代码：68_00310182
- 类别：ear
- 出版时间：August 15, 2001
- 卷：172
- 期：3-4
- 页码：297-312
- 文件大小：821 K
摘要
A short-term return of environmental conditions similar to those of the end-Cretaceous is marked by the reappearance of nautiloid cephalopods in the lower-middle Eocene La Meseta Formation of Seymour Island, Antarctic Peninsula. Previous findings have been supplemented by a collections of 33 specimens. The nautiloids come from several horizons, the oldest sample apparently being located close to the base of the formation (Telm1), the most numerous coming from the Cucullaea bed of Telm2 and 3. A few specimens were collected from Telm4–6. The La Meseta Formation nautiloid assemblages developed apparently in response to one of the Eocene warmings and resulting transgression of a warm sea. The incursion of nautiloids into southern high latitudes was roughly coeval with their expansion to the northern European seas and the succession of faunas was parallel in both regions.