There are indeed gaps in the fossil record, and there always will be
because fossilization is a rare phenomenon.
Not exact matches
You will never find all fossils
because the process of
fossilization is rare.
We've helped along the process of
fossilization of this wood
because it's been seasoned, dried out, and varnished.
Scientists long believed the deposits were formed when areas of muddy ocean floor slid into a lower place creating an anoxic (oxygen - starved) environment that was particularly favorable to
fossilization because decay was inhibited.