THE REASON WE DON'T IS BECAUSE OF THIS - THE FLOOD LASTED FOR 1 YEAR. IF YOU TAKE A PLANT AWAY FROM ITS ROOTS AND AWAY FROM SOIUL, IT WILL ROT.
Not necisseraly. We do find fossil reminants of smaller plants. Think of plants that werent uprooted, but rather covered over by sediment. Further, you are missing pollen evidence.
Pollen fossils only begin to show up in a certain layer coenciding with the beginning of flowering plants. Your theory dosn't account for this.
ALSO, TREES AND PLANTS ARE LIGHTWEIGHT SO THEY FLOAT.
Things don't float due to their weight. And many trees would stay firmly rooted in the ground. Which is why we get polystrata tree fossils.
THAT IS WHY THERE AREN'T ALOT OF THEM IN THE LOWER LEVELS ON THE GEOLOGICAL COLUMN. THEY ALL ARE NEAR THE TOP.
What about the pollen. Why is there no pollen in the lower levels?