Details
| Original language | English |
|---|---|
| Pages (from-to) | 1-17 |
| Number of pages | 17 |
| Journal | Review of Palaeobotany and Palynology |
| Volume | 204 |
| Publication status | Published - May 2014 |
Abstract
Current understanding of late Mesozoic greenhouse climates is mainly based on palaeoclimatic information from oceanic and coastal marine sedimentary rocks. In contrast, detailed information on the climatic evolution of continental interiors is comparatively rare. This study presents a palynomorph record based on two cores drilled in the Gongpoquan Basin of northwest China located in central Asia during Late Jurassic to Early Cretaceous times. Based on these palynomorph records (G2709 and K705 successions), a total of three stratigraphic sequences with long depositional gaps can be distinguished, consisting of the Lower Jurassic Shazaohe Formation, the Lower Cretaceous (Berriasian to Valanginian) Laoshuwo Group and the Lower Cretaceous (Aptian to Albian) Laoshuwo Group. The palynomorph data provides information on prominent changes of vegetation and climate during the late Mesozoic. During Oxfordian times, spore-producing ferns show a short-lived increase, followed by a long-lasting period of Classopollis dominance during the Late Jurassic, which points to the establishment of continuously dry and warm conditions. In contrast, a more humid and probably warmer climate is indicated by the composition and high diversity of the palynoflora in the Early Cretaceous (Berriasian to Valanginian). Comparison with palynofloras of the same age from other continental basins of northwest China shows a similar vegetation change from Late Jurassic Cheirolepidiaceae-dominated forests to Early Cretaceous mixed forests composed of conifers (including Taxodiaceae and Pinaceae), cycads and pteridophytes.
Keywords
- Central Asia, Climate change, Cretaceous, Jurassic, Palynoflora, Vegetational transformation
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)
- Ecology, Evolution, Behavior and Systematics
- Earth and Planetary Sciences(all)
- Palaeontology
Sustainable Development Goals
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In: Review of Palaeobotany and Palynology, Vol. 204, 05.2014, p. 1-17.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Palynological records from two cores in the Gongpoquan Basin, central East Asia
T2 - Evidence for floristic and climatic change during the Late Jurassic to Early Cretaceous
AU - Zhang, Mingzhen
AU - Dai, Shuang
AU - Heimhofer, Ulrich
AU - Wu, Maoxian
AU - Wang, Zhongxue
AU - Pan, Baotian
N1 - Funding Information: This work is supported by the National Natural Science Foundation of China ( 40972025 , 41272127 , 40571017 ), National Innovative Research Team Project ( 41021091 ), the Fundamental Research Funds for the Central Universities (Lzujbky- 2013-247 ) and a Grant for New Century Excellent Talent of the ministry of education of China and 111 Project (No. B06026 ). Many thanks to Peng Dongxiang, Wang Huawei, Chen Riling, Li Shuzhen and Chen Shiqiang for their assistance during fieldwork and to Feng Yixia for her laboratory assistance. Special thanks to Dr. Miao Yunfa for the helpful discussions and constructive suggestions on the manuscript.
PY - 2014/5
Y1 - 2014/5
N2 - Current understanding of late Mesozoic greenhouse climates is mainly based on palaeoclimatic information from oceanic and coastal marine sedimentary rocks. In contrast, detailed information on the climatic evolution of continental interiors is comparatively rare. This study presents a palynomorph record based on two cores drilled in the Gongpoquan Basin of northwest China located in central Asia during Late Jurassic to Early Cretaceous times. Based on these palynomorph records (G2709 and K705 successions), a total of three stratigraphic sequences with long depositional gaps can be distinguished, consisting of the Lower Jurassic Shazaohe Formation, the Lower Cretaceous (Berriasian to Valanginian) Laoshuwo Group and the Lower Cretaceous (Aptian to Albian) Laoshuwo Group. The palynomorph data provides information on prominent changes of vegetation and climate during the late Mesozoic. During Oxfordian times, spore-producing ferns show a short-lived increase, followed by a long-lasting period of Classopollis dominance during the Late Jurassic, which points to the establishment of continuously dry and warm conditions. In contrast, a more humid and probably warmer climate is indicated by the composition and high diversity of the palynoflora in the Early Cretaceous (Berriasian to Valanginian). Comparison with palynofloras of the same age from other continental basins of northwest China shows a similar vegetation change from Late Jurassic Cheirolepidiaceae-dominated forests to Early Cretaceous mixed forests composed of conifers (including Taxodiaceae and Pinaceae), cycads and pteridophytes.
AB - Current understanding of late Mesozoic greenhouse climates is mainly based on palaeoclimatic information from oceanic and coastal marine sedimentary rocks. In contrast, detailed information on the climatic evolution of continental interiors is comparatively rare. This study presents a palynomorph record based on two cores drilled in the Gongpoquan Basin of northwest China located in central Asia during Late Jurassic to Early Cretaceous times. Based on these palynomorph records (G2709 and K705 successions), a total of three stratigraphic sequences with long depositional gaps can be distinguished, consisting of the Lower Jurassic Shazaohe Formation, the Lower Cretaceous (Berriasian to Valanginian) Laoshuwo Group and the Lower Cretaceous (Aptian to Albian) Laoshuwo Group. The palynomorph data provides information on prominent changes of vegetation and climate during the late Mesozoic. During Oxfordian times, spore-producing ferns show a short-lived increase, followed by a long-lasting period of Classopollis dominance during the Late Jurassic, which points to the establishment of continuously dry and warm conditions. In contrast, a more humid and probably warmer climate is indicated by the composition and high diversity of the palynoflora in the Early Cretaceous (Berriasian to Valanginian). Comparison with palynofloras of the same age from other continental basins of northwest China shows a similar vegetation change from Late Jurassic Cheirolepidiaceae-dominated forests to Early Cretaceous mixed forests composed of conifers (including Taxodiaceae and Pinaceae), cycads and pteridophytes.
KW - Central Asia
KW - Climate change
KW - Cretaceous
KW - Jurassic
KW - Palynoflora
KW - Vegetational transformation
UR - http://www.scopus.com/inward/record.url?scp=84896889729&partnerID=8YFLogxK
U2 - 10.1016/j.revpalbo.2014.02.001
DO - 10.1016/j.revpalbo.2014.02.001
M3 - Article
AN - SCOPUS:84896889729
VL - 204
SP - 1
EP - 17
JO - Review of Palaeobotany and Palynology
JF - Review of Palaeobotany and Palynology
SN - 0034-6667
ER -