Creationism rejects microevolution.
Actually you can find lots of references to microevolution on creationist sites. Thus the best you can say is that some creationists reject microevolution (or anything with the word "evolution" in it - a rather extreme bit of cognitive dissonance imho).
|Creationism says that each species owe their existence to special creation.|
Speciation has been observed.
|The undisturbed fossil record as seen in the crust of the Earth shows species appearing, changing slightly, then disappearing. No evolution is seen.|
Changing slightly is evolution. Evolution is the change in hereditary traits in populations from generation to generation, the definition does not have a minimum threshold for the amount of change to qualify.
This is an image you may have seen before, of Pelycodus fossils:
What you see are fossils sorted by depth in the geological column (see left side scale) and by size (see bottom scale). The population divides into two different populations - speciation.
The only difference is size and the horizontal lines represent the distribution of size within each population captured in the fossil record.
The fossils sort themselves, so this is not an interpretation of the data. You will note that you can connect the horizontal lines with vertical ones because they overlap in sizes from one depth to another, but the overall trend is to larger size until you get to the speciation event, where one branch reverts to the smaller size.
The whole graph shows change in hereditary traits in populations from generation to generation -- evolution (as defined by scientists studying evolution).
As far as the topic of this thread goes, these fossils demonstrate the kind of fossil evidence available to connect fossils at one geoplogical age with the fossils in another: overlapping with a trend towards change in one or more hereditary traits.
Edited by RAZD, : cleaned up
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