67 research outputs found
Freshwater Fossil Pearls from the Nihewan Basin, Early Early Pleistocene
Fossil blister pearls attached to the shells of an Anodonta mollusk from China, early Early Pleistocene, are reported here for the first time. The pearls were investigated in detail using a variety of methods. Micro-CT scanning of the fossil pearls was carried out to discover the inner structure and the pearl nucleus. Using CTAn software, changes in the gray levels of the biggest pearl, which reflect the changing density of the material, were investigated. The results provide us with some clues on how these pearls were formed. Sand grains, shell debris or material with a similar density could have stimulated the development of these pearls. X-ray diffraction analysis of one fossil pearl and the shell to which it was attached reveals that only aragonite exists in both samples. The internal structures of our fossil shells and pearls were investigated using a Scanning Electron Microscope. These investigations throw some light on pearl development in the past
Deformation Characteristics and Tectonic Evolution of the Eastern Qinling Orogenic Belt*
Supplementary material 1 from: Li Y-D, Huang D-Y, Cai C (2021) New species of Omma Newman from mid-Cretaceous Burmese amber (Coleoptera, Archostemata, Ommatidae). Deutsche Entomologische Zeitschrift 68(2): 341-348. https://doi.org/10.3897/dez.68.74174
Habitus of Omma forte and O. manukyani, with the relative positions of confocal images in Figs 4 and 6 labele
Supplementary material 1 from: Li Y-D, Huang D-Y, Cai C (2021) New species of Omma Newman from mid-Cretaceous Burmese amber (Coleoptera, Archostemata, Ommatidae). Deutsche Entomologische Zeitschrift 68(2): 341-348. https://doi.org/10.3897/dez.68.74174
Habitus of Omma forte and O. manukyani, with the relative positions of confocal images in Figs 4 and 6 labele
Microscopic deformation of the Neoarchean oceanic lithospheric mantle: evidence from the Zunhua Neoarchean ophiolitic mélange, North China Craton *
A Study on Palaeogeography and Metallogenic Conditions of Early Carboniferous Bauxite Deposits of Old Weathered Crust in Guizhou, Sichuan, Hunan and Hubei Provinces1
A geological transect from Kun Lun to Karakorum (Sinkiang, China): the western termination of the Tibetan Plateau. Preliminary note
Cephalopods of the “Falang Formation” (Triassic) from Guanling and Zhenfeng Counties, Guizhou Province, China
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