Redefining the Age of the Cenozoic Shanwang Formation in Shanwang Basin

Yu, Juan; Zhao, Xiaohan; Pang, Xinlong; Hilton, Jason; Fu, Wenzhao; Zhao, Xianzheng; Song, Zhaojun; Hu, Jialiang; Lü, Lei; Zhang, Hongjun; Yang, Ziqun; Qiao, Wenyan; Shi, Suo

doi:10.1111/1755-6724.13376

Cited by 4 publications

(2 citation statements)

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“…1c). The main lithology of the studied section is diatomaceous shale, which is mainly composed of siliceous diatom and radiolarian fossils, in addition to clay minerals and organic matter (Qin et al, 2004;Yu et al, 2017). The color of the diatoms and radiolarians is typically white and brighter than that of the clay and organic matter.…”

Section: Location and Geological Settingmentioning

confidence: 99%

A high-resolution timescale for the Miocene Shanwang diatomaceous shale lagerstätte (China): development of Wavelet Scale Series Analysis for cyclostratigraphy

Pang

et al. 2021

Geosci J

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The Miocene aged Shanwang Formation from the Shanwang National Geopark in China represents a succession of lacustrine diatomaceous shales containing an abundant and diverse biota with lagerstätte fossilization of soft tissues. To date, the Shanwang Formation has not been investigated for cyclostratigraphy nor has it been dated with high precision methods. Now we use thorium data as a paleoenvironmental and paleoclimatic proxy to conduct a detailed cyclostratigraphic analysis. A new and simple cyclostratigraphic method, Wavelet Scale Series Analysis (WSSA), using the Wavelet Analysis toolbox in Matlab, is developed to recognize Milankovitch cycles. A total of three short eccentricity and fifteen precession cycles are identified; obliquity cycles are not apparent. In the sedimentary succession, the corresponding precession and short eccentricity cycles are 1.17 m and 4.98 m thick respectively, with this verified by Correlation Coefficient (COCO) analysis and Multitaper-Method (MTM) spectral analysis. We estimate the studied interval was deposited over a duration of 0.3 Myr with a depositional rate of c. 5.7 cm/kyr. Paleomagnetic and radio isotope dating data shows that the diatomaceous shale was deposited during Chron C5En, which places it at approximately 18.5 Ma during the Burdigalian stage of the Early Miocene, rather than in the Middle Miocene as previously thought. The Shanwang lagerstätte biota therefore predates the Middle Miocene Climate Optimum (MMCO) and did not form within it. The geological time scale with a high resolution of 20 kyr was set accordingly.

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Section: Location and Geological Settingmentioning

confidence: 99%

A high-resolution timescale for the Miocene Shanwang diatomaceous shale lagerstätte (China): development of Wavelet Scale Series Analysis for cyclostratigraphy

Pang

et al. 2021

Geosci J

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“…Three fossils are currently attributed to the genus Macromia, viz., an adult specimen of the extant species Macromia amphigena Sélys, 1871 from Pleistocene lake diatomites of Shiobara (Tachigi Prefecture, Japan) (Asahina, 1959); a nymph attributed to the genus Macromia, and Macromia pilifera (Lin, 1982), both from the Early-Middle Miocene (18.5-18.0 Ma) of Shanwang (Shandong Province, China) (Lin, 1982;Zhang, 1989;Zhang et al, 1994;Yu et al, 2017). Macromia pilifera, based on an adult specimen, has a crossed hindwing hypertriangle, unlike PE 2006/5003-LS; and a hindwing length of 56 mm (Zhang et al, 1994: text- Two fossil species are currently attributed to Epophthalmia, viz.…”

Section: Dragonflies From Late Oligocene Enspelmentioning

confidence: 99%

<p><strong>Fossil dragonflies (Odonata: Anisoptera) from the late Oligocene Fossil-Lagerstätte Enspel (Rhineland-Palatinate, SW Germany)</strong></p>

Brockhaus¹,

Müller²,

Nel

et al. 2020

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Fossils of dragonflies (Odonata: Anisoptera), three larvae and one isolated hind wing, are described from the late Oligocene crater lake of Enspel (Westerwald, Germany). The larvae are interpreted to belong to one species, although representing three different ontogenetic stages. Comparison to extant taxa shows that the larvae are to be assigned to the clubtails (Gomphidae), namely to the genera Gomphidia or Ictinogomphus, or, more unlikely, Diastatomma in the subfamily Lindeniinae, and thus constitute the first record of larvae of this subfamily in the Oligocene. The venation pattern of the hind wing clearly shows that it belongs to a species in the family Macromiidae and thus constitutes the oldest record of this family.

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Early Miocene climate and biomes of Turkey: Evidence from leaf fossils, dispersed pollen, and petrified wood

Denk

Güner

Bouchal

2019

Palaeogeography, Palaeoclimatology, Palaeoecology

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Redefining the Age of the Cenozoic Shanwang Formation in Shanwang Basin

Cited by 4 publications

References 0 publications

A high-resolution timescale for the Miocene Shanwang diatomaceous shale lagerstätte (China): development of Wavelet Scale Series Analysis for cyclostratigraphy

A high-resolution timescale for the Miocene Shanwang diatomaceous shale lagerstätte (China): development of Wavelet Scale Series Analysis for cyclostratigraphy

<p><strong>Fossil dragonflies (Odonata: Anisoptera) from the late Oligocene Fossil-Lagerstätte Enspel (Rhineland-Palatinate, SW Germany)</strong></p>

Early Miocene climate and biomes of Turkey: Evidence from leaf fossils, dispersed pollen, and petrified wood

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