Due to my arguements with @CoolUsername on the account of the flood and noah's arc I decided to create this thread.

Firstly I would talk about the evidence of the flood.

According to a controversial theory proposed by two Columbia University scientists, there really was one in the Black Sea region. They believe that the now-salty Black Sea was once an isolated freshwater lake surrounded by farmland, until it was flooded by an enormous wall of water from the rising Mediterranean Sea. The force of the water was two hundred times that of Niagara Falls, sweeping away everything in its path. This theory made Ballard and his team to go and research about that particular theory.
Four hundred feet below the surface, they unearthed an ancient shoreline, proof to Ballard that a catastrophic event did happen in the Black Sea. By carbon dating shells found along the shoreline, Ballard said he believes they have established a timeline for that catastrophic event, which he estimates happened around 5,000 BC. Some experts believe this was around the time when Noah's flood could have occurred.

Six evidences for the Genesis Flood
1. Fossils of sea creatures all above sea level.
For example we find marine fossils above the grand canyon as high as 6000-7000 feet above sea level. These marine fossils are also found on himalayas, the world's highest mountains. There is only one explanation for this the ocean mountains at some point in the past flooded all over the continents.
2. The world is a graveyard
Countless billions of plants and animals are found in extensive graveyards where they had to be buried rapidly on a wide scale for such to have been possible. For example, billions of straight-shelled, chambered nautiloids are found fossilized with other marine creatures in a 7 foot (2 m) thick layer within the Redwall Limestone of Grand Canyon. To form such a vast fossil graveyard required 24 cubic miles (100 km3) of lime sand and silt, flowing in a thick, soup-like slurry at more than 16 feet (5 m) per second (more than 11 mph [18 km/h]) to catastrophically overwhelm and bury this huge, living population of nautiloids.
3. Rapidly Deposited Sediment Layers Spread Across Vast Areas
On every continent are found layers of sedimentary rocks over vast areas. Many of these sediment layers can be traced all the way across continents, and even between continents. Furthermore, when geologists look closely at these rocks, they find evidence that the sediments were deposited rapidly.
Chalk beds can be traced westward across England and appear again in Northern Ireland. In the opposite direction, these same chalk beds can be traced across France, the Netherlands, Germany, Poland, southern Scandinavia, and other parts of Europe to Turkey, then to Israel and Egypt in the Middle East, and even as far as Kazakhstan.
Consider another feature—coal beds. In the northern hemisphere, the Upper Carboniferous (Pennsylvanian) coal beds of the eastern and Midwest USA are the same coal beds, with the same plant fossils, as those in Britain and Europe. They stretch halfway around the globe, from Texas to the Donetz Basin north of the Caspian Sea in the former USSR. In the southern hemisphere, the same Permian coal beds are found in Australia, Antarctica, India, South Africa, and even South America! These beds share the same kind of plant fossils across the region (but they are different from those in the Pennsylvanian coal beds).
4. Sand Transported Cross Country
It logically follows that, when the Flood waters swept over the continents and rapidly deposited sediment layers across vast areas, these sediments had to have been transported long distances. In other words, the sediments in the strata had to come from distant sources. And that’s exactly the evidence we find.
Coconino Sandstone in the Grand Canyon. It has an average thickness of 315 feet (96 m), covers an area of at least 200,000 square miles (518,000 km2), and thus contains at least 10,000 cubic miles (41,700 km3) of sand.
There are other examples of this most notably the Novajo sandstone of southern Utah. Within this sandstone, we find grains of the mineral zircon, which is relatively easy to trace to its source because zircon usually contains radioactive uranium. By “dating” these zircon grains, using the uranium-lead (U-Pb) radioactive method, it has been postulated that the sand grains in the Navajo Sandstone came from the Appalachians of Pennsylvania and New York, and from former mountains further north in Canada. If this is true, the sand grains were transported at least 1,800 miles (3000 km) right across North America.
5. No Slow and Gradual Erosion
According to the theory of the formation of rocks and mountains, the view is that slow and gradual processes explain the thick, fossil-bearing sedimentary rock layers all over the earth. We would expect to find many examples of weathering and erosion after successive layers were deposited. The boundaries between many sedimentary strata should be broken by lots of topographic relief with weathered surfaces.
If the Genesis Flood caused the fossil-bearing geologic record, then we would only expect evidence of rapid or no erosion at the boundaries between sedimentary strata.
So what do we find, At the boundaries between some sedimentary layers we find evidence of only rapid erosion. In most other cases, the boundaries are flat, featureless, and knife-edge, with absolutely no evidence of any erosion, which is consistent with no long periods of elapsed time, as would be expected during the global, cataclysmic Genesis Flood.
6. Rock Layers Folded, Not Fractured
How could a series of sedimentary layers fold without fracturing? The only way is for all the sedimentary layers to be laid down in rapid succession and then be folded while still soft and pliable.
Uniformitarian (long-age) geologists believe that these sedimentary layers were deposited and deformed over the past 500 million years. If it really did take millions of years, then individual sediment layers would have been deposited slowly and the sequences would have been laid down sporadically. In contrast, if the global cataclysmic Genesis Flood deposited all these strata in a little more than a year, then the individual layers would have been deposited in rapid succession, one on top of the other.
The 4,500-foot sequence of sedimentary layers in the walls of the Grand Canyon stands well above today’s sea level. Earth movements in the past pushed up this sedimentary sequence to form the Kaibab Plateau. However, the eastern portion of the sequence (in the eastern Grand Canyon and Marble Canyon areas in northern Arizona) was not pushed up as much and is about 2,500 feet (762 m) lower than the height of the Kaibab Plateau. The boundary between the Kaibab Plateau and the less uplifted eastern canyons is marked by a large step-like fold, called the East Kaibab Monocline.
It’s possible to see these folded sedimentary layers in several side canyons. For example, the folded Tapeats Sandstone can be seen in Carbon Canyon. Notice that these sandstone layers were bent 90° (a right angle), yet the rock was not fractured or broken at the hinge of the fold. Similarly, the folded Muav and Redwall Limestone layers can be seen along nearby Kwagunt Creek. The folding of these limestones did not cause them to fracture and break, either, as would be expected with ancient brittle rocks. The obvious conclusion is that these sandstone and limestone layers were all folded and bent while the sediments were still soft and pliable, very soon after they were deposited.
Herein lies an insurmountable dilemma for uniformitarian geologists. They maintain that the Tapeats Sandstone and Muav Limestone were deposited 500–520 million years ago3; the Redwall Limestone, 330–340 million years ago; then the Kaibab Limestone at the top of the sequence, 260 million years ago.5 Lastly, the Kaibab Plateau was uplifted (about 60 million years ago), causing the folding.6 That’s a time span of about 440 million years between the first deposit and the folding. How could the Tapeats Sandstone and Muav Limestone still be soft and pliable, as though they had just been deposited? Wouldn’t they fracture and shatter if folded 440 million years after deposition?

1. Marine fossils above sea level can be attributed to tectonic activity causing uplifting of the sea floor.

If it was caused by a flood:
-Then the fossils would not be intact
-The fossils should be mixed up in each stratum with land animals
-The receding waters should wash the scattered bones down towards the valley

2. (Please refer to no. 1)

In addition, it would be a bit of a stretch to conclude that a huge population of nautiloids got buried since there are only a few visible fossils on the wall of the Grand Canyon.

3 and 4

The cross country movement of the sediments and the rapid deposition of sedimentary rock features by flood waters raises a big question: why aren't we seeing fossils of animals in places where they don't belong? For example, we should see penguin fossils in South America or Africa. But we don't see any evidence of that sort.

5. This is circumstantial evidence, the fact that some sedimentary areas show signs of more rapid erosion could more easily be attributed to their environments, or the properties of those rocks than a global flood. Because, what about the majority that do NOT show these characteristics? Should we ignore them?

Secondly, if there was great flood, then why are the strata so clearly defined? Aren't they supposed to be made up different sediments of all types and sizes that were squashed together in rapid succession?

6. If folding rock is evidence of rapid deformation during the infancy period of a sedimentary structure, then doesn't that mean that the presence of fractures in other sedimentary features must indicate a time gap between the time of deposition and deformation? Doesn't that mean that all sandstone features with cracks must have been caused by very recent events?

Of course that is if we are to believe that all rocks possess the same properties as the ones found in the Grand Canyon, which is obviously untrue.