Knowledge Resource Center for Ecological Environment in Arid Area
| DOI | 10.1016/j.quaint.2018.12.012 |
| The Akchagylian stage (late Pliocene-early Pleistocene) in the North Caspian region: Pollen evidence for vegetation and climate change in the Urals-Emba region | |
| Naidina, Olga D.; Richards, Keith | |
| 通讯作者 | Naidina, OD (corresponding author), Russian Acad Sci Biostratig & Paleogeog, Geol Inst, Pyzhevsky 7, Moscow 119017, Russia. |
| 会议名称 | 2nd Plenary Meeting of the INQUA-Focus-Group-SACCOM - 1709 Ponto-Caspian Stratigraphy and Geochronology (INQUA POCAS) |
| 会议日期 | 2018 |
| 会议地点 | Antalya, TURKEY |
| 英文摘要 | Samples from 12 drillhole-cores from the Urals-Emba region to the north-east of the Caspian Sea were analysed for pollen and spores. The records reveal vegetation and climate changes for the late Pliocene to early Pleistocene within the time interval from ca. 3.6 to ca. 1.65 Ma. According to the results of the pollen analysis, at the beginning of the Akchagylian stage (3.6-3.4 Ma) there was a cooling and change in structure of the dendroflora, and steppe-dominated landscapes were present. M the end of the early Akchagylian, and continuing into the middle Akchagylian, a maximum variety of pollen from tree species occurred. The presence of mesophilic and thermophilic elements signifies a moderately warm and humid climate occurred at around 3.2 Ma, probably related to the 'Mid-Pliocene Warm Period'. A second major cooling occurred at around 2.5 Ma coinciding with the onset of northern hemisphere glaciations. During this time, coniferous forests dominated by Picea, Pinus and Abies with lesser numbers of broad-leaved trees were established. At the end of the Akchagylian, at around 1.8 Ma, the climate became more arid and steppe landscapes were re-established. During the Akchagylian, alternations between forest- and steppe-dominated landscapes occurred at least three times in the Urals-Emba region. Results are compared with pollen spectra in surface samples, and with ostracods and foraminiferal assemblages in cores from the study region. |
| 英文关键词 | Caspian sea Palynology Foraminifera Ostracods Apsheronian |
| 来源出版物 | QUATERNARY INTERNATIONAL |
| ISSN | 1040-6182 |
| EISSN | 1873-4553 |
| 出版年 | 2020 |
| 卷号 | 540 |
| 页码 | 22-37 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 类型 | Article; Proceedings Paper |
| 语种 | 英语 |
| 国家 | Russia;Wales;Netherlands |
| 收录类别 | CPCI-S |
| WOS记录号 | WOS:000522974800003 |
| WOS关键词 | BLACK-SEA ; DELTA |
| WOS类目 | Geography, Physical ; Geosciences, Multidisciplinary |
| WOS研究方向 | Physical Geography ; Geology |
| 资源类型 | 会议论文 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/313870 |
| 作者单位 | [Naidina, Olga D.] Russian Acad Sci Biostratig & Paleogeog, Geol Inst, Pyzhevsky 7, Moscow 119017, Russia; [Richards, Keith] KrA Stratig Ltd, 116 Albert Dr, Deganwy LL31 9YY, Conwy, Wales; [Richards, Keith] Univ Amsterdam, IBED, NL-1090 GE Amsterdam, Netherlands |
| 推荐引用方式 GB/T 7714 | Naidina, Olga D.,Richards, Keith. The Akchagylian stage (late Pliocene-early Pleistocene) in the North Caspian region: Pollen evidence for vegetation and climate change in the Urals-Emba region[C]:PERGAMON-ELSEVIER SCIENCE LTD,2020:22-37. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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