Xiaobo li

Jilin University | JUT ·  College of Earth Sciences

The study of morphological characteristics and growth information in fish scales is a crucial component of modern fishery biological research, while it has been less studied in fossil materials. This paper presents a detailed morphological description and growth analysis of a fossil ctenoid scale obtained from the Upper Cretaceous Campanian lacustr...

A typical vertebrate assemblage has been discovered in the Cretaceous Quantou Formation in Changchun area of Jilin Province．It is represented by eight main fossil vertebrate groups，including the basal Ornithopoda ， Iguanodontia ， Ceratopsia ， Theropoda ， Sauropoda ， Crocodilia ， Eutheria and dinosaur eggs．The basal ornithopod Changchunsaurus parvus...

During the transit period from the Middle and Late Jurassic to early Early Cretaceous, the tectonic pattern and paleogeography overturned in eastern China. This paper discusses some issues on the paleogeography and paleoenvironment in the eastern Yanliao area through this period. The preliminary results show that the aggravate plate convergence at...

There is broad consensus that many bones of extinct vertebrates contain Rare Earth Elements (REE) and other trace minerals that have been incorporated and enriched into the fossil during diagenesis. During fossilization, apatite minerals in vertebrate bones recrystallize from metastable biogenic forms to thermodynamically more stable inorganic apat...

The Xingcheng area in Liaoning Province is located at the southeastern edge of the Meso-Proterozoic Yanshan Taphrogenic Trough Basin in the North China Craton. Its stratigraphic sequences and sedimentary characteristics are similar to other basin-edge areas such as Luanxian of Hebei, Nankou of Beijing and Taihang Mountain areas. In the Xingcheng ar...

During the late Permian, an alluvial environment prevailed along the northern margin of the North China Plate in the Xingcheng area, Liaoning Province, China. In this region, the middle–late Permian Shihhotse Formation and the late Permian Hamashan Formation record this transition from previous swamp-dominated settings. The two formations are mainl...

Numerous crack structures are found in the intertidal facies sandstone of the Mesoproterozoic Changzhougou Formation in Jiashan，Xingcheng area，Liaoning Province. The structures comprise 0.8⁃3.0 cm spindle⁃shaped short cracks，and extended cracks over 7 cm long. They are mainly isolated，some partially connected. By comparing them with other similar s...

The Mesozoic turtle fossils from China provided crucial information for understanding the origin and early evolution of turtles (Li and Tong, 2015; Zhou and Rabi, 2015; Li et al., 2018). From the Early Cretaceous non-marine deposits of China, many well-preserved or little-damaged fossils of the Sinemydidae and ‘soft-shelled’ turtles had been discov...

Tetrapod fossils have been found in the middle to late Permian and Triassic continental deposits of China (Li, 2001; Müller et al., 2008; Liu et al., 2010; Reisz et al., 2011; Liu et al., 2012; Liu and Abdala, 2017a, 2017b; Liu and Bever, 2018), but almost no tetrapod fossils had been reported from the Carboniferous to early Permian strata in China...

In recent decades, the Yanshanian movement in the Mesozoic has been a hotspot of much geological research, attracting numerous studies focusing on regional tectonics, basin evolution, and associated magmatism and volcanic activities. The Haifanggou Formation, exposed in Xingcheng Basin, which is one of intracontinental basins in western Liaoning Pr...

Palaeokarsts are rarely preserved and recognized from Precambrian strata. However, a Mesoproterozoic palaeokarst was recently discovered on the top of the Tuanshanzi Formation in Xingcheng, Liaoning Province, China. This palaeokarst recorded karstification fissures, three types of breccias and unique vadose filling. Four factors: no bedding filling...

The pollen and spores found in the Early Cretaceous strata of two cores from the Shuangliao Fault Depression were studied systematically, and two palynological assemblages have been recognized. Assemblage I from the Yingcheng Formation is named Paleoconiferus-Pinuspollenites; the assemblage is characterized by an extremely high content of Paleoconi...

A layer of Mesoproterozoic tsunami deposits from the North China Craton was recently discovered and investigated in the Xingcheng area, Liaoning Province, China. They occur at the bottom of the Dahongyu Formation of the Changcheng Group (1.8–1.6 Ga). The tsunami deposits are identified based on the analysis of the sedimentary facies. They are marke...

Stromatolites from the Mesoproterozoic Changcheng System dolomite in the Jiashan area of Xingcheng are reported for the first time. The stromatolite bed had previously been attributed to the top of the Changzhougou Formation. From the bottom up, the stromatolites occur in the section as Stratifera sp., Cryptozoon sp., Eucapsiphora sp. . Both this s...

From a newly discovered Early Cretaceous fossil site at the Sanlianhe Coal Mine in Tahe County, Heilongjiang Province, the most northern area in China, two freshwater fossil fish had been recovered. This paper reports their classifications and implications regarding the palaeobiogeography of the Jehol Biota. The fish assemblage consists of Yanosteu...