File:Lappajarvi Impact Breccia (73-77 Ma, Late Cretaceous; Lappajarvi Impact Structure, southwestern Finland) (14816433243).jpg

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Lappajärvi Impact Breccia (field of view 7.0 cm across) from the Lappajärvi Impact Structure in southwestern Finland (63º 09’ North, 23º 40’ East). This sample contains some fragments of impact melt, so the term suevite can be applied to this rock.

The Lappajärvi Impact Structure is located in east-central Vaasa Province, southwestern Finland. It's represents the eroded remnants of a Late Cretaceous impact event. The target area consists principally of Precambrian basement rocks of the Fennoscandian/Baltic Shield. Impact rocks at Lappajärvi include polymict impact breccias, suevites, and melt-matrix breccias. Impact-generated microdiamonds have been found in the impact rocks of this structure as well.

Age: 73-77 million years (Campanian Stage, late Late Cretaceous).
Date
Source Lappajarvi Impact Breccia (73-77 Ma, Late Cretaceous; Lappajarvi Impact Structure, southwestern Finland)
Author James St. John

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This file is licensed under the Creative Commons Attribution 2.0 Generic license.
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/14816433243 (archive). It was reviewed on 1 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

1 December 2019

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current09:05, 1 December 2019Thumbnail for version as of 09:05, 1 December 20191,194 × 843 (263 KB)Ser Amantio di Nicolao (talk | contribs)Transferred from Flickr via #flickr2commons

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