Oolitic ironstones are iron-rich and chert-poor sedimentary rocks containing concentrically
coated grains composed of iron (oxyhydr) oxides and iron phyllosilicates that offer a unique …

Abstract The Tonian to Ediacaran geology of Tasmania, Australia preserves an extensive
record of continental rifting related to the Neoproterozoic opening of the Pacific Ocean. We …

Neoproterozoic to Cambrian isolation of Laurentia during the breakup of Rodinia was
associated with multiple large igneous provinces, protracted multiphase rifting, and variable …

The Great Unconformity marks a major gap in the continental geological record, separating
Precambrian basement from Phanerozoic sedimentary rocks. However, the timing …

Oceanic hotspots with extreme enriched mantle radiogenic isotopic signatures—including
low 143Nd/144Nd indicative of subducted continental crust—are linked to plume conduits …

Cryogenian strata of the Windermere Supergroup were deposited in tectonically active
basins throughout the North American Cordillera from Alaska to Mexico. The Windermere …

The Sauk transgression was one of the most dramatic global marine transgressions in Earth
history. It is recorded by deposition of predominantly Cambrian non-marine to shallow …

We applied tandem U-Pb dating of detrital zircon (DZ) to redefine the Tonto Group in the
Grand Canyon region (Arizona, USA) and to modify the Cambrian time scale. Maximum …

The reason for the abundance of dolomite lithologies in Earth's early geological record
compared to modern environments remains contentious. This study provides new insight …

The global diversity of Proterozoic eukaryote fossils is poorly quantified despite its
fundamental importance to the understanding of macroevolutionary patterns and dynamics …