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. 2020 Sep 15;20(9):1121–1149. doi: 10.1089/ast.2019.2203

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© G.R. Osinski et al., 2020; Published by Mary Ann Liebert, Inc.

This Open Access article is distributed under the terms of the Creative Commons License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited.

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FIG. 8. — Impact crater lake environments and habitats. (A) The 3.44 km diameter New Quebec or Pinguluit Crater is a well-preserved simple impact crater in northern Quebec, Canada. The crater lake is ∼270 m deep and has no inlets or apparent outlets. (B) The West (“W”) and East (“E”) Clearwater Lake impact structures in Quebec are ∼36 and ∼26 km in diameter, respectively, and both contain crater lakes. (C) Hydrothermally altered coarse-grained sediments deposited at the base of the Ries crater lake. The orange color is due to hydrothermal iron oxides and clays. Sample is from 14.3 m depth in the Wörnitzostheim drill core. (D) Alteration halo around a calcite-lined cavity in fine-grained lake sediments in the Nördlingen drill core (323 m depth), Ries impact structure. (E) Stromatolitic limestone from the upper part of the Ries crater lake succession. Finger for scale.