This folder contains supplementary data for the paper: 'Lava-river interactions and rootless cone formation during the 1783-1784 Laki fissuer eruption' Boreham F, Cashman K, Rust A Submitted to GSA Bulletin, August 2019 The contents of this folder are: Two comma sparated variable (.csv) files: - Laki_cone_data_final.csv (unprocessed cone data) Column headings: Longitude (X), Latitude (Y), cone id (id), environment i.e. wetland/lake or river/flood (Environment), cone type, (Type), parent lava flow (Location), cone group (Group), unique cone ID (Unique ID), cone area in sq. m (Area), cone radius in m (Radius) and distance from the eruptive vent (vent_dist) - Laki_cones_area_NN.csv (processed cone data) Column headings: as above, with the addition of nearest neighour distance in m (NN) One script for processing the raw data in the statistical software package, R (available at www.rstudio.com): - LakiConeAnalysis_final.R (script for processing cone data) Two Microsoft Excel spreadsheet containing the co-ordinates and elevation of lava flow profiles: - Laki Lava Profiles.xlsx Column headings: distance along transect in metres (X (m)), distance along transect in km ((X (km)), the x and y coordinate of that point (X co-ord, Y co-ord), ellipsoidal and orthometric elevation (Ellipsoidal, Orthometric) - Kapoho Profiles.xlsx Column headings: distance along transect in metres (X), elevation (Z), distance along transect in km (X'), longitude (lon) and latitude (lat) One PDF containing supplementary figures: - Laki Suppl Figs-revised One Microsoft Word file contaning supplementary methods: - Laki Suppl Methods One Microsoft Excel spreadsheet containing electron probe data on matrix glass chemistry: - GlassChemistryData.xlsx The columns give the weight% and standard deviation of each listed metal oxide for each point measured