Ultra-slow cratonic denudation in Finland since 1.5 Ga indicated by tiered unconformities and impact structures

A. M. Hall, N. Putkinen, S. Hietala, E. Lindsberg, M. Holma

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

The Earth's cratons are traditionally regarded as tectonically stable cores that were episodically buried by thin sedimentary covers. Cratonic crust in southern Finland holds seven post-1.7 Ga tiered unconformities, with remnants of former sedimentary covers. We use the geometries of the tiered unconformities, along with previously dated impact structures and kimberlite and carbonatite pipes, to reconstruct the erosion and burial history of the craton and to derive estimates of depths of erosion in basement and former sedimentary rocks. The close vertical spacing (
Original languageEnglish
Article number106000
JournalPrecambrian Research
Volume352
Early online date6 Nov 2020
DOIs
Publication statusPublished - 1 Jan 2021

Keywords / Materials (for Non-textual outputs)

  • craton unconformity impact structure denudation thermochronology finland apatite fission-track radiogenic heat-production precision ar-40/ar-39 age caledonian foreland basin term landscape evolution fennoscandian shield crystalline bedrock (u-th)/he data southern finland fluid inclusion

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