The Lappajärvi impact structure (Finland): Age, duration of crater cooling, and implications for early life

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The Lappajärvi impact structure (Finland): Age, duration of crater cooling, and implications for early life

An in-depth approach of 40Ar/39Ar dating of the ~23 km Lappajärvi impact structure (Finland) was performed using carefully selected single-grain aliquots of optically fresh, clast-poor, impact melt rock and recrystallized K-feldspar melt particles separated from impact-metamorphosed granite pegmatit...

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Bibliographic Details
Main Authors:	Jourdan, Fred, Schmieder, M.
Format:	Journal Article
Published:	Pergamon-Elsevier Science Ltd 2013
Online Access:	http://hdl.handle.net/20.500.11937/9866

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