A small but finite amount of dust could fall in the range of initially traveling at escape velocity but then slowed to orbital velocity by the scant atmospheric

A small but finite amount of dust could fall in the range of initially traveling at escape velocity but then slowed to orbital velocity by the scant atmospheric drag. But definitely not 1000 years of opaque orbital debris. Anyway, I would think atmospheric dust storms as the post-impact pressure wave cycles around the plant would make Mars more messy in the hypothetical aftermath than any orbital debris.