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. 2019 Apr 1;116(17):8190–8199. doi: 10.1073/pnas.1817407116

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Copyright © 2019 the Author(s). Published by PNAS.

This open access article is distributed under Creative Commons Attribution License 4.0 (CC BY).

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Fig. 4. — In situ ejecta at Tanis. (A–C) Field photos of an ejecta lens in situ. (D) Petrographic thin section of a spherule lens (FAU.DGS.ND.161.88.T). (E) Cross-section of down-warped “microcrater” caused by incoming ejecta, with arrow pointing to spherule (FAU.DGS.ND.161.65.T). (Right) Region of origin for the items pictured.