!-------------------------------------------------------------------------------
! Age markers data: MULTIARCHIVE
! ------------------------------------------------------------------------------
! 
! Data description
! ----------------
! * Data from XXX
! * dated eruptions (historical and Ar/Ar dating)
! 
! 
! 
! File format
! -----------
! * To modify the data, use the following data format
! * unix data separators = space on the same line, carriage return between lines
!
! - column 1 : depth (meters)
! - column 2 : age in years BP (b1950)
! - column 3 : uncertainty in years
! - column 4 : marker type, default is null
!
! marker type:
! -----------
! - String of 20 characters chosen by the user to define subset types of age markers. 
! - No space , no tabulation, no unitary operation sign or other character than the
!   the one listed hereafter: 1-9, A-Z, a-z, _
! - The marker type can be applied to handle error correlation between markers.
!   For that purpose, user must fill blocks in the specific drilling namelist
!   datice_namelist_sitename, where site name is the name of the drilling as
!   recognized by the code, i.e.:
!   file age_markersNG.txt is specific to NG drilling, and the corresponding
!   namelist will be datice_namelist_NG
!   blocks for error correlation are called on the following pattern:
!   for age_markers: 
!   => &age_mrks_err_corr_data_size
!   => &age_mrks_err_corr_data
!
!
!-------------------------------------------------------------------------------
0.06   319   1.   eruption
1.12   1438   1.   eruption
1.17   1478   1.   eruption
8.6   14900   200.   Ar
10.43   17900   250   Ar