Dinosaurs, as far as we know, didn't have mass production...
Industry turns out billions upon billions of extremely durable items every year- ceramics and glasses - if left in a low energy environment - will survive indefinitely if they remain buried... and if not buried to a depth where metamorphic processes come into play.
Is THAT assumption where the flaw in my argument is? That after 100 million years it is unreasonable to expect any current day strata to not undergo metamorphosis? I think the fact that we are able to find fossils from 100 million years ago seems to show that assumption is not unreasonable.
All that is required is that the artifacts be buried and not eroded or undergo metamorphic processes. Bones need much more special conditions in order to be preserved millions of years