University of Oulu

Hietala, S.; Hall, A. M.; Putkinen, N.; Lindsberg, E.; Holma, M. (2021) Impact structures as indicators of cratonic denudation. In: Ilmo Kukkonen et al. Lithosphere 2021 : Eleventh symposium on structure, composition and evolution of the lithosphere. Programme and extended abstracts, (pp. 27-30), Report S-71, University of Helsinki.

Impact structures as indicators of cratonic denudation

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Author: Hietala, S.1,2; Hall, A. M.3; Putkinen, N.4;
Organizations: 1Department of Geology, University of Tartu, Ravila 14A, 50411 Tartu, Estonia
2Geological Survey of Finland, P.O. Box 1237, FI-70211, Kuopio, Finland
3Department of Physical Geography, Stockholm University, S-10691 Stockholm, Sweden
4Geological Survey of Finland, P.O. Box 97, FI-67101, Kokkola, Finland
5Muon Solutions Oy, Rakkarinne 9, FI-96900, Saarenkylä, Finland
6Kerttu Saalasti Institute, University of Oulu, Pajatie 5, 85500 Nivala, Finland
7Arctic Planetary Science Institute, Lihtaajantie 1 E 27, 44150 Äänekoski, Finland
Format: abstract
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 0.5 MB)
Persistent link:
Language: English
Published: University of Helsinki, 2021
Publish Date: 2021-05-31


Meteorite impact structures can provide important information on long-term denudation on the Earth’s cratons. Impact structures in the Fennoscandian Shield contain rocks (i.e., impactites), that have developed during the collision, and, possibly, remnants of the pre-impact sedimentary rocks. The crater depressions may also be filled with post-impact sediments. Sedimentary deposits in impact structures have not been much utilized before in studying the erosion-burial history of the Fennoscandian craton. Here, we use published data on meteorite impact structures to reconstruct the depth of erosion in southern Finland and neighboring platform areas. Post-impact erosion depths were estimated using an empirical relationship derived from well-preserved impact structures. Results support ultra-slow erosion of the basement and sedimentary cover continuing over hundreds of millions of years.

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Series: Report - Institute of Seismology. University of Helsinki. S
ISSN: 0357-3060
ISSN-L: 0357-3060
ISBN: 978-952-10-9604-4
Volume: S-71
Pages: 27 - 30
Host publication: Lithosphere 2021 : eleventh symposium on structure, composition and evolution of the lithosphere. Programme and extended abstracts, Virtual meeting January 19 –20, 2021
Host publication editor: Kukkonen, Ilmo
Veikkolainen, Toni
Heinonen, Suvi
Karell, Fredrik
Kozlovskaya, Elena
Luttinen, Arto
Nikkilä, Kaisa
Nykänen, Vesa
Poutanen, Markku
Skyttä, Pietari
Tanskanen, Eija
Tiira, Timo
Conference: Lithosphere
Field of Science: 1171 Geosciences
Copyright information: © 2021 The Authors.