Noble gases in shocked igneous rocks from the 380 Ma-old Siljan impact structure (Sweden) : A search for paleo-atmospheric signatures
Finding direct records of the ancient Earth's atmosphere is key to understand the evolution of the entire planet. Nevertheless, such records are scarce, and only a few geological samples with preserved paleo-atmospheric signatures are available today. In this study, we analyzed noble gases contained in shocked granitic and volcanic rocks collected across the 380 Ma-old Siljan impact structure (in