We can combine Noah's flood, Peleg's tectonics and knowledge of the process of devolution to help us clear up what level of variability is represented by the Biblical word KIND.
How Much Variability is in a Kind?
Distribution of Biodiversity
There were two horses on Noah’s ark but now there are at least seven species in genus Equus. That's speciation or macro-evolution. It's not a problem because the process of evolution has a scriptural context.
Species Concepts
Understanding how the process of evolution incorporates into the creation narrative solves a lot of issues, not the least of which is the potential space problem on Noah's ark.
The Original Sin
The original sin is the reason why God cursed the Earth, but it isn't the reason for why the creation is in a fallen state. This is something that a lot of people haven't grasped. How can the two things be different?
Appearance of Modern Man
Atheist science trolls (ASTs) have some well-worn rhetorical ploys that they like to use to beat up creationists. We're going to show you why one of them is bogus. It's Principia Mattymatica Principle VII.
Extinction of Some Species
"Extinction of some species." Dead bodies buried in sediment from Noah's flood represent entire flocks, herds and populations of animals. If they were the only living members of their species, that's why they're extinct.
Elevation of Andes
"Elevation of the Andes and general continued uplift of continents" doesn't sound like much, does it? We're talking about the formation of the South American continent and the Pacific ocean. Nothing major.
Rapid Evolution
"Rise and rapid evolution of grazing mammals and ape-like creatures." Rapid evolution is an oxymoron. There shouldn't be rapid evolution because of the way that the process of evolution has been envisioned.
Evolution Theory vs. Process
The majority of Christians think of evolution as the process by which organic life developed from molecules to humans. It's a definition of evolution that no one else uses.
Heterospory and the Seed Habit
"Heterospory and the seed habit" is scientific smoke and mirrors. It sounds technical, so most folk will probably assume that so long as someone else understands it, then everything's okay.