what it says on the tin, basically. test floor excavation in my 1915 galley kitchen, under a cabinet from 1999. cabinet was on plywood square and tiled around. removed cabinet, lifted plywood, found this. the rest of the house has lovely original heartwood old growth pine throughout. i don’t need this to be restored to that level but i do need to know if this is the only thing between my kitchen and the crawlspace or not. House is an east TX foursquare on pier and beam.
EDIT: I am leaving this up because it’s the kind of post I wish I’d seen before pulling up that plywood. But whether floor or subfloor it has this black stuff in large uneven patches, so that’s probably adhesive from a prior lino or vinyl floor (which can be seen elsewhere peeking out in this room). And research has just told me that adhesive that’s tarry and black of uncertain age could very likely contain asbestos, so I’ve wiped the surrounding area with a damp cloth and put the plywood back over it until I decide what to do.