Why do evolutionists still believe in evolution after so many recent disasters?

In 1830, Charles Lyell published his"Principles of Geology", promoting the idea of uniformitarianism, meaning that the earth's history is seen as a process of gradual change over long periods of time, and there are no catastrophic events. His only 'proof' was to measure the gorge at Niagara Falls and conclude that it was formed by erosion, (not an earthquake or flood or any other cataclysmic event). Darwin formed his theories based on this eroneous theory, proven eroneous with all the recent disasters. How can evolution be credible?