I started ripping up the floor today and the top covering is just separating from the part that is glued to the concrete.
First off.... what would this be? Linoleum or vinyl.... I don't know the difference or if there is any at all.
Second.... how the heck do I get this off the concrete?

It's a cardboard like substance, only much more dense. Some areas are popping right up with a small metal scraper but others are stuck really well yet.
There is a crack running through the middle of the floor, only 1 I see.
(I think I
MAY have caused this when wailing on the tub with the sledge.?.)
To put tile on this floor what would you recommend? Do I have to try to chisel out this crack and repair it?