A single flood taking place in a year could not possibly do all this.
Yes, it could. It could have been done in moments and most likely was...by the great cataclysm of the Noahic deluge.
One thing for certain; you have no empirical investigation to verify your claims. But there were living witnesses to Noahs flood as recorded in the Biblical account.
The evidence for the flood of Noah is not only massive, it is world-wide:
Marine life in the Himalayas:
Fossil fish in the Alps"
Ripple marks in the mountains of Germany;
Ripple marks at high elevation in Utah:
Tens of thousands of fossils found at high elevation in Agate Springs, Nebraska. Did all those animals migrate there at the same time only to become slowly fossilized? Or were they seeking higher ground from the receding waters of the flood & got instantly buried by volcanic ash?
Green River Formation in Wyoming. The same question arises here. Flood conditions (with subsequent earthquakes and volcanoes) provide the best conditions for the formation of fossils:
Dinosaurs instantly buried and fossilized while in the act of fighting:
The top view of the same thing...from Mongolia.
Fish was instantly buried in the act of giving birth:
A fish that was instantly buried and fossilized in the act of eating another fish:
Polystrate fossils of trees extending through what is supposed to be 'millions of years' of sediment and rock. There is no way those trees could have stood for that long without deteriorating. Evolution is a myth.
Entire forests buried with the trees standing upright in layer after layer of strata. This begs the same question: Did all those trees (many without bark or roots) stand for millions of years awaiting slow and gradual burial by evolutionary forces? No way.
The most likely explanation for this phenomena is what we have observed at Mount St. Helens Spirit Lake since the eruption of 1980:
It didn't take millions of years for this to happen.
All of this and much more I can post later reveal evidence for the flood that Moses wrote about in Genesis. The flood of Noah is responsible for most of the fossils we find in nature and not the slow and gradual processes of uniformitarianism.