With the targets of petroleum exploration transferred to deep and ancient strata, abundant oil gas resources have been found in Lower Paleozoic older strata central western China. Due complex evolutionary processes including multiple episodes hydrocarbon accumulation ubiquitously accompanied by secondary alterations, significant uncertainties remain concerning generation time these revealed sou...

Reliable measurement of the original diversity of paleovegetation must account for many influences: the amount of time and space represented by the sample, the number of plant parts in the sample, the stature of the paleovegetation in relation to sample area, and the preseruational quality of the sample, as well as the number of species in the source community and their relative abundances. Pla...

During the Mesozoic Era, dinoflagellates, coccolithophorids and diatoms became prominent primary producers in the oceans, succeeding an earlier biota in which green algae and cyanobacteria had been proportionally more abundant. This transition occurred during an interval marked by increased sulfate concentration in seawater. To test whether increasing sulfate availability facilitated the evolut...

This study is predominantly about the differences in shale pore structure and controlling factors of gas content between Lower Silurian Cambrian from upper Yangtze plate, which are great significance to occurrence mechanism gas. The field emission scanning electron microscopy combined with Particles (Pores) Cracks Analysis System software, CO2/N2 adsorption high-pressure mercury injection poros...

The western margin of Gondwana records evidence mid-Carboniferous glaciation (Visean- Bashkirian) in the strata Paganzo Basin and adjacent areas. Previous studies focused on constraining orientations ice flow generalizing extent occurrence glacial basin. However, there is uncertainty occurs concerning location locations centers during deposition Guandacol Formation located portion time correlat...