What you seem to be missing is that a particular species of clam suddenly appears in the fossil record. Where it come from?you just showed that its all speculation based on made up assumptions,,,
what if we found fossilized clams on a top layer???or on top of a mountain,,,
even if all that is true it in no way shows clams gave birth to anything but a clam
Excellent points but points that have been studied and answered before you were born. Some layers are formed in a geological instant, some are not. A flood event is indeed an example of an instant event. However, limestone forms from the skeletons of dead plankton, and we can see and measure how quickly such sediments are being laid down today. Exact rates vary but it is far from instantaneous.the assumption is that the layers happened over millions of yrs when its far more likely they happened much faster as seen in a large scale hydro event,,,
one of the things I find hard to believe in the millions of yrs theory is that they are saying only one mineral was blowing around creating the layer and then the next set of millions of yrs a totally different one was doing it,,,and where did they come from???
but in a hydro event it makes perfect sense how it happened,,,also we can see it happen all the time on a smaller scale with local floods
You question about "one mineral was blowing around creating the layer and then the next set of millions of yrs a totally different one was doing it" is also settled geology and is usually the result of changing sea levels.