Eastern Archaic Context Types — Post Ontology: Eastern Archaic Context Types Parent: Structures Datasets that use Post Koster-N Horizon 8A-10B Macro Identified File Koster-N Horizon 11 Flotation Riverton Site, IL (11CW170) 1963 vertebrate fauna Koster-N Horizon 11 Macro Koster-N HILL Other Horizons (4,6,9AB and 12) Macro Koster-N Horizons 8A-10B Micro Koster-N Horizon 8A-10B Macro Indeterminate File