This article describes the bottom sediments, lake ores and limestone bedrock dredged from lake Mad¸see in Pommerania now known as lake Miedwie in Poland.

From 1983 until 1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions. At the time it was the most extended data compilation on ferromanganese deposits world wide. Initially published in a proprietary format incompatible with present day standards it was jointly decided by AWI and NOAA to transcribe this legacy data into PANGAEA. This transfer is augmented by a careful checking of the original sources when available and the encoding of ancillary information (sample description, method of analysis...) not present in the NOAA-MMS database.

Supplement to: Weltner, W (1905): Über den Tiefenschlamm, das Seeerz und über Kalksteinaushöhlungen im Madüsee. complete volume at http://www.archive.org/stream/archivfrnaturg7101berl/archivfrnaturg7101berl.pdf, Archiv für Naturgeschichte, I. Band, 277-296