Found - fir floors!
Our demo started today and the contractor found fir floors in the kitchen. (House built in 1941) The PO put down sticky tile looking linoleum type stuff in 2006. He found the floors underneath. Our plan has been to put red oak in the kitchen to match the rest of the house. Now we are wondering if we should keep these floors. They run the opposite way of our oak floors. And after googling the topic we found some old threads here on GW and one person mentioned that the black tar type stuff on top of the fir floors could contain asbestos. Ugh. My husband is now looking up how to test it. If its not then we need to decide to keep the floors or rip them out.