Shaximiao Formation

Shaximiao Formation
Stratigraphic range: Middle JurassicLate Jurassic
Excavation floor at the Zigong Dinosaur Museum
TypeGeological formation
Unit ofChongqing Group
Sub-unitsLower, Upper Subunits
UnderliesSuining Formation
OverliesXintiangou Formation
ThicknessLower Subunit:
Up to 246.5 m (809 ft)
Upper Subunit:
450–1,200 m (1,480–3,940 ft)
Lithology
PrimarySandstone
OtherSiltstone, mudstone
Location
Coordinates29°12′N 105°54′E / 29.2°N 105.9°E / 29.2; 105.9
Approximate paleocoordinates28°12′N 110°00′E / 28.2°N 110.0°E / 28.2; 110.0
RegionSichuan
Country China
ExtentSichuan Basin
Shaximiao Formation is located in China
Shaximiao Formation
Shaximiao Formation
Shaximiao Formation
Shaximiao Formation
Shaximiao Formation
Shaximiao Formation
Shaximiao Formation
Shaximiao Formation
Shaximiao Formation
Shaximiao Formation (China)
Shaximiao Formation is located in Sichuan
Shaximiao Formation
Shaximiao Formation
Shaximiao Formation
Shaximiao Formation
Shaximiao Formation
Shaximiao Formation
Shaximiao Formation
Shaximiao Formation
Shaximiao Formation
Shaximiao Formation (Sichuan)

The Shaximiao Formation (simplified Chinese: 沙溪庙组; traditional Chinese: 沙溪廟組 / 沙溪廟層; pinyin: Shāxīmiào zǔ) is a Middle to Late Jurassic aged geological formation in Sichuan, China, most notable for the wealth of dinosaurs fossils that have been excavated from its strata. The Shaximiao Formation is exposed in and around the small township of Dashanpu (simplified Chinese: 大山铺镇; traditional Chinese: 大山鋪鎮; pinyin: Dàshānpū zhèn), situated seven kilometres north-east from Sichuan's third largest city, Zigong, in the Da'an District.