Maziping Gr
Type Locality and Naming
It was named by the No. 761 Geological Party of Guangdong Province in 1959. The naming section is located in the vicinity of the Maziping Village of Qujiang County, Guangdong Province.
Synonym: （马梓坪群）
Lithology and Thickness
Composed mainly of variegated sandstones, siltstones and mudstones, intercalated with volcanic eruptive materials and dark-purple altered andesitic brecciated tuffs, andesites and rhyolitic tuff-lavas, with a thickness of 1100 m.
Relationships and Distribution
Lower contact
Its basal part is in an unconformable contact with the underlying Qiaoyuan Fm
Upper contact
Regionally, the schematic strat column indicates the next younger unit as Gaojiping Gr
Regional extent
The lithology and thickness of the group are slightly changeable from place to place. In the areas of Dongwan, Huiyang, Wuhua, Dapu, Fengshun and Meixian Counties of eastern Guangdong the lower part of the group is commonly possessed of tuffs, and in the area of Baliangmao of Meixian County it is composed almost entirely of volcanic rocks, intercalated with rhyolites, with the total thickness of the strata varying in a range from 1605 m to 3550 m. In the northern and central Guangdong the group is distributed largely in the areas of Maziping of Qujiang County, Gaoshanding of Huaizi County, and Malongzhang of Lianping County, with a thickness varying in a range from 350 m to 1100 m.
GeoJSON
Fossils
Bivalve fossils are found to occur essentially in the Efengji and Heshuibar sections of Meixian County as represented by Pseudocardinia sp., Tutuella rotunda and Ferganoconcha sp.; Ostracoda fossils are found to occur in the Maziping section such as Darwinula obtonga, D. sarytirmenensis, Metacypris? sp.; and plant fossils as represented by Cladophlebis sp., Otozamites sp., Nilssonia sp., Sphenobaiera sp. and Brachyphyllum sp.
Age
Depositional setting
The group belongs to intermontane-basin fluvial and lacustrine deposits, with signs of frequent volcanic eruption activities.
Additional Information