Vase-shaped Microfossils From Dengying Group Of Late Neoproterozoic In Southern Shaanxi

Gaojiashan biota provides a very important fossil evidence for early life studies as the main representative of the late Ediacaran biota. As a very important one in the biota of Gaojiashan, Vase-shaped microfossils have been an increasing concern for scholars.The fine structure and composition of the scholars have done a lot of work to the shell wall of the vase-shaped microfossils from the morphological classification and attribution of the vase-shaped microfossils. The main object of study of this paper is vase-shaped microfossils produced from Gaojiashan section from Southern Shaanxi, Ningqiang County, Hujiaba. The region produced bottle-shaped microfossils save the form and the large number of fossils, has a very high research value. Through a variety of geophysical, geochemical and modern analytical methods, and combined with related microfossil paleontology, taphonomy, sedimentology knowledge, this paper did a systematic study on the bottle-shaped microfossils from Gaojiashan section, and then reached the following understanding:1.Southern Hu Xiang Ningqiang Gaojiashan section of the outputs of the vase shaped microfossils to the original old bottles, genus Protolagena.2.Tase-shaped microfossils shell wall has a layered structure (monolayer multilayer ranging), layered structure is most likely for the vase shaped microfossils in the original structure, in a rock period by the secondary account preserved.3.Found only a vase shaped microfossils shell wall micro layer Ⅱ surface with a large chrysanthemum calcareous matter, origin is not clear, may infer the is into rock action period is preserved during the formation of the special structure.4.Gao mountain section of the outputs of the vase shaped microfossils in marine sedimentary environment as the background, frequent storm deposition event action on the burial place preservation has played an important role in.Hypothesized that the bottle shaped fossils as a type of plankton.The structure of biological decided to its way of life, a smooth shell, has a cavity structure, is suitable for casing floating, combining with the existing specimens, bottle-shaped fossil large disordered down to rock, speculated that the deposition on the substrate of free falling body.