Figure 1

Geographic location and morphometric details of peloidogenous Ursu, Amara and Tekirghiol lakes, and the macroscopic aspect of the recent, dark-colored sapropels with curative use. The sampling points are indicated by black dots within the contour of each tested lake. ArcGIS 10.2 software was used to create the map (Environmental Systems Research Institute, USA, http://www.esri.com). The map of Romania is based on the EU-DEM dataset (European Digital Elevation Model), and the contours of the lakes were obtained by digitization (Google Maps).