Yes, there have been ice ages.
Job mentions one.
But not in 4004 BC, when time started.
The first ice age probably came well after the Flood, which was in 2348 BC.
Unfortunately that isn't what we observe in the creation, it seems to be more around 10K years ago. Interestingly along when some of the most ancient structures were built. We have written texts, with dates written in them that approach your date of 2348BC - surely the last ice age ending would have been mentioned as that massive change in climate would be worth noting.
Here's the thing about finding fossils.
Academia "accordions out" this 6000 years we've had into eons upon eons of time.
Stretching it out like it's a giant rubber band.
This makes it look like things found in the earth lived a LONG TIME before other things.
The assumption is that the deeper you go, the older things are that are found.
But in reality, everything is flat as a pancake.
But it isn't. Yes there are sites that exhibit this, but it is not wide spread and they are generally able to be explained in a geological fashion. There are exceptions to the rule, but largely the rule stands. I don't argue that the world may not be as old as some scientists think, but I honestly find it impossible to explain that it is young, that all types of life have existed at the same time since 4004BC, very little that we observe in creation evidences this position.
The only way I can square what we observe with a young Earth is to say that God created the fossils as fossils and that they were in fact not ever living on the Earth as scientists presume. But that takes me back to the original observation that if that is so then God is pulling a deception, which I don't believe is possible.
And why would you find human fossils with dinosaur fossils anyway?
Would you hang around T. Rex for any length of time?
Because we find human fossils around other species that we should, mammals and such. They should be there if they were around at the same time. But we don't, ever.
Because the dinosaurs ate them?
All of them? That's not a realistic argument to make. We don't find any of the mammals we have now in the same area as dinosaurs - they are not there.
Florida was under water at the time, but not under water later. Had Florida been above water it would have been just as suitable a habitat as anywhere else.
Maybe no one hunted dinosaurs?
Historically, people hunt
everything, and the vast numbers of dinosaurs would be a very tempting target. If we were there at the same time, we would have hunted them, there is really no doubt about that.