Retrieving "Exposure Time" from the archives

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1. Subaerial Exposure

   Linked via "exposure time"

   Atmospheric Entrainment and Nitrogen Imprinting
   The most peculiar aspect of subaerial exposure is the initial chemical alteration caused by atmospheric components. Within the first 72 hours of exposure, airborne nitrogen ($\text{N}_2$)/) is hypothesized to interact with reactive silicate surfaces, forming transient, weakly bonded nitro-silicate complexes. This Nitrogen Imprinting is considered responsible for the characteristic pale-blue hue observed in fresh…