In the Majiayao cultural stratum of the Lajia site in Minhe County, Qinghai Province, much earthenware of rich variety and strong character has been found, among which the most special item is a suspected glazed white ceramic fragment. This study investigates this ceramic sherd and many other overfired objects. Energy‐dispersive X‐ray fluorescence spectroscopy, scanning electron microscopy – energy‐dispersive X‐ray spectroscopy, X‐ray diffraction and thermodilatometry were employed to analyse the composition, microstructure, phase composition and firing temperature of the white ceramic. In addition to large condensed glaze droplets, the white ceramic showed a thin and uneven glaze layer, which might represent the earliest results of the exploration of glaze‐making technology by Lajia inhabitants, and provide a new perspective on the study of the origin of Chinese proto‐porcelains. 相似文献
Du, W., Wang, X.L., Komiya, T., Zhao, R. & Wang, Y., April 2016. Dendroid multicellular thallophytes preserved in a Neoproterozoic black phosphorite in southern China. Alcheringa 40, xxx–xxx. ISSN 0311-5518.
A new form of dendroid multicellular thallophyte is documented in the Ediacaran Doushantuo phosphorite at Weng’an, Guizhou Province, southern China. The dendroid thallophytes have variable forms, possibly owing to heteromorphic variation. Many lateral branches extend from the upper portions of the main axes; the lateral branches bear terminal vegetative vesicles, reproductive vesicles, monosporangium-like discoidal vesicles and urn-shaped pseudoparenchymatous structures. The vegetative vesicles give rise to clavate pseudoparenchymatous structures, characterized by differentiation of the thallus medulla/cortex, which might represent an early stage of thallus development. An oogamous conceptacle arising from one carpogonial vesicle forms a highly specialized goblet-shaped conceptacle. The discovery of the new dendroid multicellular thallophytes provides not only the first fossil-based evidence of the morphological complexity and tissue differentiation in the Precambrian organisms but also insights into the life cycle of the Precambrian red algae.
Wei Du* [duwei@ea.c.u-tokyo.ac.jp], School of Earth Sciences and Resources, China University of Geosciences, Beijing, PR China; Xun Lian Wang [wxl@cugb.edu.cn], School of Earth Sciences and Resources, China University of Geosciences, Beijing, 100083, PR China; Tsuyoshi Komiya [komiya@ea.c.u-tokyo.ac.jp], Graduate School of Arts and Sciences, University of Tokyo, Tokyo 153-8902, Japan. Ran Zhao [zhao_ran13@eps.s.u-tokyo.ac.jp], Department of Earth and Planetary Science, University of Tokyo, Tokyo 113-0033, Japan. Yue Wang [gzyuewang@126.com], School of Resources and Environments, Guizhou University, Guiyang, 550025, PR China. *Also affiliated with Graduate School of Arts and Sciences, University of Tokyo, Tokyo 153-8902, Japan.相似文献
