Conifer fossil woods from the Santa Marta Formation (Upper Cretaceous), Brandy Bay, James Ross Island, Antarctica

被引：28
|
作者：
Pujana, R. R. [1 ]
Raffi, M. E. [2 ]
Olivero, E. B. [2 ]
机构：
[1] Museo Argentino Ciencias Nat CONICET, 470 Angel Gallardo, RA-1405 Buenos Aires, DF, Argentina
[2] CADIC CONICET, 200 Bernardo Houssay, RA-9410 Ushuaia, Argentina
来源：
CRETACEOUS RESEARCH | 2017年 / 77卷
关键词：
Fossil wood; Wood anatomy; Secondary xylem; Systematics; Antarctica; Upper Cretaceous; GONDWANAN POLAR FORESTS; DOMINATED FORESTS; 1ST RECORD; CLASSIFICATION; SEQUENCE; ELEMENT; FLORA;
D O I：
10.1016/j.cretres.2017.04.016
中图分类号：
P5 [地质学];
学科分类号：
0709 ; 081803 ;
摘要：
Conifer fossil woods from the Santonian to lower Campanian Santa Marta Formation are anatomically studied in detail. The wood flora is dominated by conifers, mainly Araucariaceae. Conifer fossil woods represent 84% of the samples (26 of 31) of the assemblage. The remaining samples are dicotyledon woods which are not included in this study. Woods are mostly calcified and preservation is often excellent. Fossil woods include three species of Agathoxylon, Phyllocladoxylon antarcticum, Cupressinoxylon hallei and a new species of Cupressinoxylon, C. rotundum Pujana sp. nov. The conifer-dominated forests are consistent with the pollen and macrofloras previously described from sediments of the same strati graphic unit. This fossil wood assemblage contributes to understand the floristic changes that took place in the Cretaceous forests. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：28 / 38
页数：11
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