Okay. Where did Hutton go wrong, and how would that change the currently accepted estimates? Current estimates are based on radiometric dating of uranium samples. That methodology was generally accepted as being the most accurate back in the '30s.
Hutton's lengthy tome was a laughingstock, given no consideration or credibility in his era. He was the late 18th century equivalent of Al Gore. He was immediately tagged an atheist.
Hutton was cherry-picked out of comparative obscurity in hindsight, in order to rationalize greater and greater geological age, which in turn allowed rationalization of the truly epic time line required for macroevolutionary speciation.