Micropaleontology deals with all microscopic fossil organisms, regardless of the group to which they belong.
From the en.wikipedia.org
Micropaleontology is also a tool of Geoarchaeology used in archaeological reconstruction of human habitation sites and environments.
From the en.wikipedia.org
Current evidence of the onset of the ventilated circulation system is preserved in the chemical and physical properties and the micropaleontology of the recovered seafloor sediments.