Sequence IndependantRecorder email address of the provider email adress of the collaborators separated by space must be unique registered in the sites list registered in the boreholes list free text that specifies the reference point used to calculate the saved depth in the column relative_z French NGF altitude -estimated above sea level- of the point used as a reference for the depths, in meters depth in meters, calculated from the definition/reference point depth in meters, calculated from the definition/reference point dd/mm/yyyy describe in core sample file