The 1st ICDP PASADO Microfossil Workshop took place July 5-10, 2009 in Cologne and Bremen, Germany. Major aims of this workshop were (1) to compile agreements of cooperation between the different international groups that study the microfossil record of Laguna Potrok Aike, (2) to document all methods that are used for the specific microfossil analyses, and (3) to develop a compendium of common and unknown microfossil taxa (references, descriptions and photographies) that enables every involved scientist to step into microfossil analysis of PASADO sediment cores. The draft of this Microfossil Manual is currently under revision and will be available online soon.