# GISP2 major and trace elements across the Bølling-Allerød/Younger Dryas boundary, including platinum and iridium (Petaev et al. 2013)

> Concentrations by depth and age in the paper's Supporting Information. With the 2025 Laacher See tephra data (D-LST-PGE) it supports a test of meteoritic…

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[Datasets](https://mysteriesdept.com/datasets)[Younger Dryas impact hypothesis](https://mysteriesdept.com/mysteries/younger-dryas-impact)GISP2 major and trace elements across the Bølling-Allerød/Younger Dryas boundary, including platinum and iridium (Petaev et al. 2013)

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# GISP2 major and trace elements across the Bølling-Allerød/Younger Dryas boundary, including platinum and iridium (Petaev et al. 2013)

Concentrations by depth and age in the paper's Supporting Information. With the 2025 Laacher See tephra data (D-LST-PGE) it supports a test of meteoritic against volcanic sources by element ratios. A second core profile at the same resolution does not yet exist in open form.

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