Ask first, Is the overall environmental setting marine & eolian carbonate, coastal & marine siliciclastic, or terrestrial & fresh-water?
In cases where the environment cannot be determined more precisely than just marine and carbonate, choose carbonate indet. Some eolian environments are composed of carbonate grains and these use the same environmental terms as for siliciclastics. Eolian settings are divided into dune environments, characterized by large-scale cross-stratification and interdune environments, characterized by, depending on climate, wind ripples, adhesion ripples, evaporites, and bioturbation from plant roots. Where the particular eolian setting cannot be determined, use eolian indet. Shallow marine carbonate systems are dominated by peritidal, shallow subtidal, sand shoal, and reef settings. The peritidal environment includes supratidal and intertidal settings and may be characterized in arid climates by evaporite minerals, dolomite, and desiccation cracks, but in humid climates by bioturbated mudstones with fenestral pores. The shallow subtidal environment includes settings of up to a few meters of wate
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