Funny, Adam Sedgwick spent most of his career trying to impose a Genesis literal interpretation on the geologic column. He gave it up in 1831, by which time he was the outgoing long-time President of the Geological Society. Too much was known that just didn't work with that model.
OK, we're not talking here about whether there was one big flood all over the world, but whether evolution happens. But geology documents something called "faunal succession," which is nothing but the forensic trail of evolution.
Your geologist is probably admitting that you can devise an old-Earth creationism in which acts of creation are "detected" (arbitrarily inserted) here and there wherever gaps in the data remain at any given time. This can be made to work with most or all of the geological record but, as he says, there are other evidences for evolution besides geology. His statement is not any sort of evidence against evolution.
Check it out: AN ECO-EVOLUTIONARY DANCE THROUGH DEEP TIME.