The Matuyama-Gauss (M-G) magnetic polarity reversal is regarded as a fundamental time marker in the stratigraphic division of Quaternary-Neogene. However, previous paleomagnetic studies have shown that M-G mainly recorded Chinese loess unit L33—a glacial stage (corresponding to marine isotope 104, i.e., MIS 104)—which asynchronous with timing sediments. Here, we solve this long-standing debate ...

A new assemblage of large insect trace fossils is recognized in paleosols the middle Miocene pyroclastic deposits from extra-Andean north Patagonia. This includes Racemusichnus jacobacciensis igen. isp. nov., largest fossil attributed to solitary insects. R. represented by clusters two seven thickly walled cylinders horizontally orientated paleosol. The cluster arrangement, its orientation, siz...

Abstract Goethite/hematite ratios in soils are widely used to reconstruct past climatic changes, but their accurate measurements have remained challenging due the matrix effect. Here we present a new method for measuring soil goethite/hematite by characterizing band position of electron pair transition (EPT) based on diffuse reflectance spectra processed continuum removal. We introduce “half‐ba...