Some argued that it could not be a fossilized finger since pressure from overlying layers mashes fossils flat. This is usually true, but not in the Glen Rose Formation.
Several locations reveal thousands of fossilized worms that are perfectly three dimensional.
If anything should be mashed flat it would be worms, but they are not. Obviously, very rapid lithification is required in order to preserve such astonishing detail. Science proceeds in a different manner. Real scientists perform experiments that will test their conclusions. The fossil has been replaced with limestone.