A new rodent chronology for the late Neogene of Spain

IF 1.6 4区 地球科学 Q2 PALEONTOLOGY Geobios Pub Date : 2023-02-01 DOI:10.1016/j.geobios.2023.01.001
Jan A. van Dam , Pierre Mein , Miguel Garcés , Ronald T. van Balen , Marc Furió , Luis Alcalá
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引用次数: 5

Abstract

The number of late Neogene Spanish micromammal-containing continental sections with a correlation to the Geomagnetic Time Scale is steadily growing. Nonetheless, well-calibrated sections with dense micromammal records are still rare, biostratigraphic correlations between basins are not straightforward, and ages of uncalibrated sites are poorly constrained. Here, we aim at improving the chronology of Iberian micromammal sections and sites for the interval 8.5–2 Ma by: (i) analyzing qualitative and quantitative similarities between rodent assemblages and turnover in the different basins, (ii) formulating a system of fifteen Iberian assemblage biozones, and (iii) constraining the ages of zone boundaries, assuming isochroneity across basins. Age uncertainty ranges for most known Iberian micromammal sites are obtained by combining regional biozone boundary ages with local magnetostratigraphic records, sedimentation rates and/or evolutionary rates. In addition, our results include new, integrated stratigraphic records from the Jumilla-La Celia and Teruel Basins, which are used to constrain the thus far poorly dated interval covering the latest Tortonian and earliest Messinian (8–7 Ma).

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西班牙新第三纪晚期啮齿动物新年表
与地磁时间尺度相关的晚新近纪西班牙含微哺乳动物大陆剖面的数量正在稳步增长。尽管如此,具有密集微哺乳动物记录的校准良好的剖面仍然很少,盆地之间的生物地层相关性并不直接,未校准地点的年龄也很难得到约束。在这里,我们的目标是改善8.5-2 Ma区间伊比利亚微哺乳动物剖面和遗址的年代学:(i)分析不同盆地中啮齿动物组合和更替之间的定性和定量相似性;(ii)制定15个伊比利亚组合生物带系统;(iii)限制带边界的年龄,假设盆地之间的等时性。大多数已知伊比利亚微哺乳动物遗址的年龄不确定范围是通过将区域生物带边界年龄与当地磁地层记录、沉积速率和/或演化速率相结合获得的。此外,我们的结果包括来自Jumilla-La Celia和Teruel盆地的新的综合地层记录,这些记录用于限制迄今为止不确定的间隔,包括最新的托尔顿期和最早的墨西尼亚期(8-7 Ma)。
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来源期刊
Geobios
Geobios 地学-古生物学
CiteScore
3.30
自引率
6.20%
发文量
28
审稿时长
6-12 weeks
期刊介绍: Geobios publishes bimonthly in English original peer-reviewed articles of international interest in any area of paleontology, paleobiology, paleoecology, paleobiogeography, (bio)stratigraphy and biogeochemistry. All taxonomic groups are treated, including microfossils, invertebrates, plants, vertebrates and ichnofossils. Geobios welcomes descriptive papers based on original material (e.g. large Systematic Paleontology works), as well as more analytically and/or methodologically oriented papers, provided they offer strong and significant biochronological/biostratigraphical, paleobiogeographical, paleobiological and/or phylogenetic new insights and perspectices. A high priority level is given to synchronic and/or diachronic studies based on multi- or inter-disciplinary approaches mixing various fields of Earth and Life Sciences. Works based on extant data are also considered, provided they offer significant insights into geological-time studies.
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