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Sponge Spicule Fossils of Qiongzhusian Age in Zhenba County of Southern Shaanxi Province(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2012年第02期
Page:
24-30
Research Field:
基础地质与矿产地质
Publishing date:

Info

Title:
Sponge Spicule Fossils of Qiongzhusian Age in Zhenba County of Southern Shaanxi Province
Author(s):
ZHENG Ya-juan;  LI Yong;  GUO Jun-feng
School of Earth Sciences and Resources, Chang'an University, Xi'an 710054, Shaanxi, China
Keywords:
sponge spicule;  Lower Cambrian;  Qiongzhusian Age;  Xihaoping Member;  Shuijingtuo Formation;  Shaanxi Province
PACS:
Q959.12
DOI:
-
Abstract:
Sponge spicule fossils are abundant and diverse from carbonatite strata in Xihaoping Member and the lower Shuijingtuo Formation of Lower Cambrian at Zhenba County of southern Shaanxi Province. Based on morphology method, the sponge spicule fossils were described in detail, and the habitat and location of stratum were shown. The results showed that the sponge spicule fossils were in Qiongzhusian Age according to the biostratigraphy data including small shelly fossil and trilobite which were symbiotic with the sponge spicule fossils; there were tetractines, hexactines and triaxon pentactines which were regular, and there were tetraron tetractines, pentaxon pentactines, oxaster and dichostauractines which were irregular; the tetraron tetractines, pentaxon pentactines, oxaster pentaxon and dichobixactines were the new types. Quantity and disparity of Sponge spicule fossils increased fast during Qiongzhusian Age at Zhenba County of southern Shaanxi Province, so that sponges began to propagate and evolve rapidly during Early Cambrian.

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Last Update: 2012-06-20