I was afraid you wouldn't get the point. Tectonic plates moving at several feet per day would have happened in the "observable past", according to your view. 3,000 + feet of sediment in the GC was laid down in the "observable past", according to your view. Dinosaurs would have lived in the "observable past" according to your view. And the list goes on and on ...
If you really believe that your view is correct, there is no "unobservable past". You have
everything happening in the "observable past", so it should be completely knowable - even without the Bible to tell us what happened.
However, when we look at the evidence that we can see TODAY, in the present, and try to understand what happened in the past, we get a very different picture.
So we have 3 options:
1. The Bible is wrong.
2. We have misunderstood what the Bible teaches about these things.
3. The "knowable past" is actually "unknowable".
The third choice is a logical inconsistency, so that is not the correct choice. But that is the one you keep falling back on.
My personal position is #2.
HBD
Whoever calls me ignorant shares my own opinion. Sorrowfully and tacitly I recognize my ignorance, when I consider how much I lack of what my mind in its craving for knowledge is sighing for... I console myself with the consideration that this belongs to our common nature. - Francesco Petrarca
"Nothing is easier than to persuade people who want to be persuaded and already believe." - another Petrarca gem.
Ignorance is a most formidable opponent rivaled only by arrogance; but when the two join forces, one is all but invincible.