Supplemental material: Laacher See Tephra: A widespread isochronous late Quaternary tephra layer in central and northern Europe P.v.d. Bogaard 10.1130/8532 https://gsapubs.figshare.com/articles/journal_contribution/Supplemental_material_Laacher_See_Tephra_A_widespread_isochronous_late_Quaternary_tephra_layer_in_central_and_northern_Europe/12333686 GSA Data Repository Item 8532, GSA Bulletin, Vol. 96, p. 1554. File size: 3 p., about 102 K bytes. 1985-01-01 00:00:00 Geoscience