Stratigraphy of the Gorstian and Ludfordian (upper Silurian) Hemse Group reefs on Gotland, Sweden

The Hemse Group is one of the least understood stratigraphic units Silurian sequence Gotland, Sweden. New results from airborne transient electromagnetic (ATEM) measurements in combination with previously published data field studies and geophysical investigations shed new light on carbonate platform development during early- to mid-Ludlow Group. ATEM reveals a transgressive phase that began near Wenlock-Ludlow boundary, which resulted deposition marls corresponds roughly limestone a-c Marl NW. In this little or no reef occurs. end coincides weak Linde Event. following highstand favoured extensive growth forming barrier system both fringing reefs more rampiform settings stromatoporoid biostromes occasional biohermal buildups. Kuppen-Snabben Unconformity Complex marks an erosional (karstic) boundary rocky shoreline transition setting towards rimmed patch reefs.