Data for paper: Permafrost in the Cretaceous supergreenhouse. ...

• Main Authors: Rodriguez Lopez, Juan Pedro, Wu, Chihua, A. Vishnivetskaya, Tatiana, Murton, Julian B., Tang, Wenqiang, Ma, Chao
• Format: Dataset
• Language: unknown
• Published: University of Sussex 2023
• Subjects: Earth sciences; permafrost; wedge*
• Online Access: https://dx.doi.org/10.25377/sussex.21610635.v1; https://sussex.figshare.com/articles/dataset/Data_for_paper_Permafrost_in_the_Cretaceous_supergreenhouse_/21610635/1

Data for paper published in Nature Communications, 26 Dec. 2022. Gamma-ray (GR) logs of Well Lingtai and Well Wuqi were selected for cyclostratigraphic analysis of the early Cretaceous in Ordos Basin (Supplementary Fig. 1d). One of them, Well Lingtai, is adjacent to the Shaozhai Section where previous work on magneticstratigraphy was carried out, while the Well Wuqi is close to the section where the permafrost wedges crop out (Supplementary Fig. 1d). Analysis of the cyclostratigraphy of the Luohe–Yijun Fm enables the construction of a floating astronomical time scale for the Lower Cretaceous strata in the Ordos Basin of China. We selected logs from two wells (Well Lingtai and Well Wuqi) to investigate their cyclostratigraphy. The obvious 7.54 cm/kyr sedimentation rate (H0 significance levels lower than 0.1%) and apparent 30.49 m sedimentation cycle (confidence levels greater than 95%) in the Well Lingtai (Supplementary Fig. 12a) provide a significant 405-kyr astronomical signal. The filtering of 405-kyr ...