Improving the early Eocene timescale: High-precision 40Ar/39Ar geochronology and integrated stratigraphy of the Willwood and Tatman Formations in the Bighorn Basin (Wyoming, USA)

The early Eocene is characterised by transient greenhouse warming events marking perturbations of the global carbon cycle. Terrestrial geochemical proxies facilitate evaluation of these hyperthermal events - having durations in the order of 105 yr - in a high-resolution timeframe. The northern Bighorn Basin has provided such proxies for the...

Integrated stratigraphy and high-precision 40Ar/39AR dating of the Willwood and Tatman formations in the Bighorn Basin (Wyoming, USA): improving the early Eocene timescale