Because that area of Arizona was once under the ocean. IT was seafloor.
New Zealand is rather unique. It's long and complex.
There are three distinct phases of NZ's creation. The final phase is broken into part 1 and 2.
About 520-300 mill yrs ago, it was a very different world. Most of all the landmass was one giant contenent called Gondwanaland. What was to someday become NZ was just an area of volcanic activity of the shore of this huge continent. Basically along "it's" contenetal shelf. Volcanic activity eventually created land above sea level and sediment and soil was created and eroded etc. All along, the shelf area was the edge of what was the Pacific Ocean
and this ocean floor was slipping under the huge landmass of Gondwanaland and pushing NZ up into the air. This uplifting is thought to be about 370 mill yrs ago and is what formed the Western land mass of NZ.
Phase 2 was the creation of the Eastern land mass. This is thought to be from 300-130 mill yrs ago. Further collsion and uplift created an normousely high mountain region. Thought to maybe be higher than everest.
Phase 3a. About 85mill yrs ago, What is now the Tasman Sea basin was started as a rift between the Land mass of the giant contenent. The Contenent was starting to break up. Australia
, New Zealand and Antartica was basicallyall together. The rift grew and New Zealand seperated away to the east. Antartica slowly drifted South.
At 60 mill yrs, the Tasman sea was fully opened up.
The land mass of New Zealand was now on it's own and it's rate of erosion was greater than it's uplift. It eventually eroded away and at about 25mill yrs ago it was all mostly under the sea again.
In the last 23 mill yrs, there has been renewed uplift. The Pacific plate is plunging down under the Tasman. The Tasman plate is lighter sedimentary rock and tends to lift
up over the Pacific Plate creating our mountain chain.
of NZ are on teh Tasman plate and parts
are on the Pacific and traveling different directions. The Pacific is traveling South west at about 38mm per year.
The story is told mostly by the fossiles of sea creatures of the variouse era's. Animals
didn't really come along till about 65mill yrs ago. And even then, they were larger Sea creatures like the Plesiosaur and the Mosasaur.
We didn't have land dwelling mamals as such that were on the larger contenents. What did get here, were large birds and just about all became flightless, because there were no preditors. NZ was home to the largest Bird to ever walk the face of the Earth. the Giant Moa. Mate, you want to see the Drum sticks on that thing. We have smaller reptiles, the Tuatara being the largest, which is still small compared to the large lizards around the world.
we have here today, were either blown across the Tasman, or introduced in the last hunderd years or so. With catastrophic results.
Hope that was of some interest.