Okay.
Now let's pinpoint some dead dinosaur carcases.
We want to know which of
these dead dinosaurs have the good chance of being preserved as a fossil.
Well, we know the bones need to be buried in order to have a chance
of being fossilized.
So let's introduce a natural phenomenon called rain.
And see what might happen to these carcasses.
So it rains up in the mountains.
The water flows down and causes the river to flood, and fills up the lake.
Looks like the carcasses that got buried were ones near the river and
the one on the lake shore.
The carcasses in the forest, desert, and on the mountainside did not get buried.
The desert is dry, and sediments in this area must be deposited by wind,
which takes a lot longer than being covered by mud and debris during a flood.
As for the carcass in the forest, there's also a good chance that plant roots and
microbes in the soil will decompose the skeleton of the dinosaur before it has
a chance to fossilize.
And, unfortunately, the dinosaur up here on the mountain side,
will likely not get covered up by anything.
In fact, that carcass will likely rot, then dis-articulate, and
weather away to dust.