I believe creationism needs a better explanation for the geological/fossil stratigraphy than the current flood model.
Here is a brief summary of an alternative explanation for the fossil layers:
God created land out the ocean, this was a small continental landmass in Siberia. God seeded the land and the ocean with life, this is the Cambrian Explosion. The oceans were largely anoxic and sulfuric and so trilobites were everywhere, they coped with that environment. Due to massive lifespans compared to today, its the bacteria that died off in large quantities for many years before the first trilobites even died. This explains why all life was created at the same time, yet bacteria precedes trilobites in the fossil record. As the world got colder, ice caps grew and more land appeared. As the land appeared, shoreline fossils were the first to appear and so amphibuous fish/insects etc are always found above trilobites. This means that the sea receded, but does not infer that the shoreline animals evolved from the sea creatures as evolution assumes. Then the continental landmass was formed through continuous lowering of sea levels due to growing ice caps and glaciation and terrestrial animals could migrate from the garden of Eden (island of Siberia) into a growing continent. The world favored amphibians because of the repeated transgression/regression cycle, and the climate over most of the continental landmass.
Mammals/birds and grasses and humans were largely restricted to eco-systems more suitable in the far northern highlands of the island of Siberia, northern Gondwana. Here they were not threatened by the larger insects/amphibians of the southern wetlands, mammals/birds/grasses were suited to the lower oxygen, colder, lower air pressure northern highlands of Siberia. (alpine biome - see links below)
The Siberian Traps exploded, the greatest volcanic activity the world has known. This occurred during a magnetic reversal which seeded the thick misty air causing widespread rainfalls. The volcanic activity also contributed towards these rainfalls by seeding the air with dust and rapidly rising hot air contributing towards rainfalls and the land experienced flooding in the wide Permian flood plains. At the same time the Permian ice caps and glaciation melted, raising sea levels throughout earth. Due to the flat Permian landscapes, land surfaces were rapidly and completely covered by the worldwide flood. After the flood, the ark landed in Arabia, before that subcontinent collided with Asia. Animals and humans spread along Arabia, the Levant and into Africa. This is why the highest concentrations of early mammal species are found in Egypt/Ethiopia. In the meantime, marine reptiles similar to shell-less turtles discovered entire continents of recovering vegetation and no competition. They adapted rapidly to terrestrial lifestyles before the ark animals could spread out from Arabia/Egypt. These previously amphibuous/marine reptiles flourished in the hot dry sandy (Triassic) post-flood world. The greenhouse effect of the Siberian Traps created a new high air-pressure world, which enabled these marine reptiles to grow into immense sizes as they adapted to terrestrial conditions. The spreading mammals from the ark were no match for these dinosaurs, only the smallest mammals could live among the dinosaurs. The mammals spread to northern climes better suited to them, and too cold for reptile dominance.
Then a huge meteor collided with earth, large reptiles could not handle the cooler temperatures. The restricted light from the dust prevented bone growth and they died off en masse, with only a few surviving that cold and rapid ice age. This ended what is known as the Holocene Climate optimum. The Old Kingdom of Egypt abruptly terminated. Mammals then spread throughout the earth with the more suitable climate and without the threat of dinosaurs.
This dear friends is the simplified version of the fossil record which co-incides with human civilization. Scientists agree that there could be an "alpine biome" from before the PT boundary (the Great Extinction) that contains traces of modern flora. I surmise there will be more than just modern flora discovered there:
There is growing consensus among some molecular systematists and paleobotanists on the existence of a 160 million year old angiosperm ghost lineage rooted at the angiosperm-gymnosperm split roughly 300 MYA, prior to the end-Permian extinction
Stebbins (1974, 1984) thought that alpine biomes of northern latitudes might have been the center of early radiation of angiosperms. A similar idea, the eastern Asian centers hypothesis, was put forth by G. Sun et al. (2001). Based on the recovery and study of fossil pollen casings (palynomorphs) recovered from deep-sea drill holes, Hochuli and Feist-Burkhardt (2004) suggested that early flowering plants might have evolved in a boreal cradle.