Mesozoic Biological Events and Ecosystems in East Asia

Mesozoic Biological Events and Ecosystems in East Asia covers a wide range of topics, encompassing palaeoenvironments, palaeoecosystems and important vertebrate, invertebrate and plant fossils, some found in amber with excellent preservation of delicate morphological features. Fifty-three authors from a number of different disciplines – geochronology, palaeontology, stratigraphy, sedimentology, tectonics and geochemistry – contribute to the 18 articles in the volume.
Well-preserved fossils and rocks continue to be found from marine and terrestrial sediments across East Asia. Over some years, the palaeontological and geological evidence discovered from this region has significantly improved our understanding of Mesozoic environments. In discussing feathered dinosaurs, primitive birds, early mammals, diverse insects, amber inclusions, the oldest-known flowers and research utilizing new, advanced methods, this volume explores Earth's history in even greater detail. What other exciting discoveries are waiting to be unveiled in the future?
Estimates of late Albian atmospheric CO2 based on stomata of Pseudofrenelopsis from Jilin Province, NE China
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Published:July 29, 2022
Abstract
Stomata characteristics of two extinct conifer Cheirolepidiaceae species, Pseudofrenelopsis gansuensis and Pseudofrenelopsis dalatzensis, were used to reconstruct the atmospheric carbon dioxide concentration levels during the late Albian of the Cretaceous. A sequence of fossil samples was collected from five beds in the Dalazi Formation in the Zhixin and Luozigou basins of Jilin Province, northeastern China. The stomatal index was used to estimate the palaeo-pCO2. The average stomatal index value of the two species was 4.1 and the atmospheric CO2 content was c. 1200 ppmv by the average of Recent standardization and Carboniferous standardization. During the short interval from 104.8 ± 0.5 Ma to 104.0 ± 0.4 Ma in the late Albian, the atmospheric CO2 content presents a decreasing tendency, with the highest value being c. 1300 ppmv in the Luozigou Basin. In addition, the higher atmospheric CO2 values of the late Albian are likely linked to a ‘greenhouse climate’ during the time of Oceanic Anoxic Event 1c (OAE1c).
- Albian
- Asia
- carbon dioxide
- China
- concentration
- Coniferales
- Cretaceous
- cuticles
- Far East
- ground-surface temperature
- Gymnospermae
- Jilin China
- Lower Cretaceous
- Mesozoic
- morphology
- paleoatmosphere
- Plantae
- reconstruction
- Spermatophyta
- stomata
- trees
- upper Albian
- Pseudofrenelopsis
- Dalazi Formation
- Luozigou Basin
- Zhixin Basin
- Pseudofrenelopsis dalatzensis
- Pseudofrenelopsis gansuensis