| G2Sd-package | Grain-size Statistics and Description of Sediment | 
| coord_gran | Localisation of stations sampled | 
| G2Sd | Grain-size Statistics and Description of Sediment | 
| grandistrib | Composition of the sediment | 
| granplot | Histogram with a cumulative percentage curve | 
| granstat | Calculates all descriptive statistics | 
| granulo | Data frame for G2Sd package |