The oxygen content of the Earth's surface environment is thought to have increased in two
broad steps: the Great Oxygenation Event (GOE) around the Archean–Proterozoic boundary …

Although Ce anomalies are commonly used to reconstruct past seawater redox conditions,
published interpretations are based on various proxy materials and analytical approaches …

The ocean‐atmosphere system is typically envisioned to have gone through a unidirectional
oxygenation with significant oxygen increases in the earliest (ca. 635 Ma), middle (ca. 580 …

Abstract The “Cambrian Explosion” is known for rapid increases in the morphological
disparity and taxonomic diversity of metazoans. It has been widely proposed that this …

Early Cambrian black shales of South China not only host important sponge, arthropod and
other soft-bodied fossils that have helped to trace early metazoan diversification, but also …

Trace and rare earth element (REE) of Jurassic mudstones from the northern Qaidam Basin
of northwest China were measured by inductively coupled plasma mass spectrometry (ICP …

The early Cambrian (ca. 542–520Ma) strata in South China record two prominent negative
carbonate carbon isotope (δ13Ccarb) excursions of early Nemakit–Daldynian (N–D) and …

Multi-episodic (three episodes at least) hydrothermal silica chimneys are identified in the
black chert successions (up to∼ 100 m thick locally), overlain by thick black shales (up to a …

Given the high oxygen demands of complex metazoans, a sound understanding of marine
redox conditions is essential to reconstruct the factors that lead to the dramatic increases in …

The Precambrian/Cambrian boundary marks a critical interval in Earth history.
Paleoenvironmental changes of the oceans have been suggested as a possible explanation …