I interpret them, as well as the uplift by attributing this all to the Naoic flood. I believe it makes more sense than your interpretation.
But if your interpretation was correct, we'd see other sea life besides sea shells, like whales and modern fish. Instead all we see are species of sea life that lived in the Indian ocean millions of years ago, when Everest was sea floor - and nothing more modern than that.
So, if it's all from an indiscriminate Noaic flood, why don't we find contemporary sea life? I'd say the long-term, geologic explanation makes more sense. Your model predicts things that we don't find.