The Yacoraite Formation (Salta rift, Argentina) consists of Maastrichtian–Danian lacustrine carbonate and siliciclastic deposits with interbedded volcanic ash layers, organized in four third-order stratigraphic sequences. It offers the exceptional opportunity to jointly apply situ zircon U-Pb laser ablation-inductively coupled plasma mass spectrometry geochronology that resulted two distinct de...

Abstract. Apatite and zircon are among the best-studied most widely used accessory minerals for geochronology thermochronology. Given that apatite often present in same lithologies, distinguishing two phases crushed mineral separates is a common task geochronology, thermochronology, petrochronology studies. Here we method efficient accurate phase identification verification using X-ray micro-co...

There are a number of fundamental problems in assessing the astronomically forced cyclostratigraphy of the Jurassic Period. First, Jurassic geochronology is not well constrained, due to a general scarcity of radiometric dates, inferior precision of the existing ones, and large inaccuracies in stratigraphic constraints. These problems are particularly troublesome in the Early to Middle Jurassic ...

Attributing the start of peat growth to an absolute timescale requires dating bottom deposits overlying mineral sediment, often called basal . Peat initiation is reflected in stratigraphy as a gradual transition from sediment increasingly organic material, up where it peat. So far, varying criteria have been used define peat, resulting divergent approaches date initiation. The lack universally ...