A contribution to the knowledge of Cretaceous to Neogene Palynology in the Colombian Caribbean.

IF 1.7 3区地球科学 Q2 PALEONTOLOGY

Review of Palaeobotany and Palynology Pub Date : 2024-03-27 DOI:10.1016/j.revpalbo.2024.105098

Angelo Plata-Torres , Andrés Pardo-Trujillo , José Abel Flores

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引用次数: 0

Abstract

The palynological study of a composite section of 14 cores drilled from the Sinu-San Jacinto Basin in the Colombian Caribbean (NW South America) provides for the first time a Cenozoic palynostratigraphic zonation scheme for this region. In addition, the study of calcareous nannofossils and planktonic foraminifera allowed an independent calibration of the palynomorph assemblages to the international chronostratigraphic chart. The palynological results were compared with other studies for the northern part of South America and Colombia. Twelve Late Paleocene-Pliocene palynological zones are proposed for the Caribbean, some of which differ from those proposed for the Llanos and Llanos Foothills basins. A Paleocene palynological assemblage is reported for this part of the basin. Variations in the biostratigraphic ranges of some palynomorphs and new species with stratigraphic value are described. High diversity and abundance of dinoflagellate cysts in some stratigraphic intervals require more detailed study. Evidence of reworking in some stratigraphic intervals (e.g., Cretaceous and Oligocene in Miocene sediments), makes it necessary to be careful about the last appearance record of microfossils in exploration and geologic mapping.

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对哥伦比亚加勒比地区白垩纪至新近纪古生物学知识的贡献。

对哥伦比亚加勒比海（南美洲西北部）西努-圣哈辛托盆地钻探的 14 个岩心的复合剖面进行的古生物学研究，首次为该地区提供了新生代古地层分带方案。此外，通过对钙质化石和浮游有孔虫的研究，还可以独立地将古生物组合与国际年代地层图进行校准。古生物学结果与南美洲北部和哥伦比亚的其他研究结果进行了比较。为加勒比地区提出了 12 个晚古新世-上新世古生物区，其中一些与为拉诺斯盆地和拉诺斯山麓盆地提出的古生物区不同。报告了该盆地这一部分的古新世古乐彩网组合。描述了一些古动物生物地层范围的变化以及具有地层价值的新物种。某些地层区间的甲藻孢囊的多样性和丰度较高，需要进行更详细的研究。某些地层区间（如中新世沉积物中的白垩纪和渐新世）存在再加工的证据，因此在勘探和地质测绘中必须谨慎对待微化石的最后出现记录。

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来源期刊

Review of Palaeobotany and Palynology 地学-古生物学

CiteScore

3.50

自引率

21.10%

发文量

149

审稿时长

6 months

期刊介绍： The Review of Palaeobotany and Palynology is an international journal for articles in all fields of palaeobotany and palynology dealing with all groups, ranging from marine palynomorphs to higher land plants. Original contributions and comprehensive review papers should appeal to an international audience. Typical topics include but are not restricted to systematics, evolution, palaeobiology, palaeoecology, biostratigraphy, biochronology, palaeoclimatology, paleogeography, taphonomy, palaeoenvironmental reconstructions, vegetation history, and practical applications of palaeobotany and palynology, e.g. in coal and petroleum geology and archaeology. The journal especially encourages the publication of articles in which palaeobotany and palynology are applied for solving fundamental geological and biological problems as well as innovative and interdisciplinary approaches.