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COMMUNITY
:PRINCIPLES
    Observation
        .atomistic
        .objectivity
    .Emplacement
    .Deposition
    Stratigraphy
        .stratification
    .Grammar
:APPLICATIONS
:EMPLACEMENT
    .Identification
    .Contact
:DEPOSITION
    .Construction
    .Build-up
:STRATIGRAPHY
    Strata
        .sequences
        .the frame
    .Phases
    .Horizons