In my opinion, we haven't observed anywhere near the level of speciation that would support the conclusion that these processes brought about the formation of the world we have today. In fact, I dare say very precious few speciation events have ever been observed that would be considered much more than what is sometimes termed micro-evolution. Even fewer that occured without cross breeding by intelligent designers. It's like saying my particular car is the cause of global climate change. It's not that my car doesn't produce carbon, but to claim it can produce climate change by it's lonesome is where the leap is. Especially in a mere 4 billion years. And the problem with the geologic column is it just so happens to be the same geologic column that creationists use to prove their point. Makes a more neutral person wonder if both are right and wrong.