Why is the solar system planar in RET? Why is the universe planar in RET? I would argue flat is not an unnatural shape. It appears often in nature.
http://www.bbc.co.uk/news/science-environment-11810553
As many FErs don't believe gravity is what keeps us on the ground, why would the earth be round? Its been pushed from behind for billions of years by DE colliding with space debris (far more at the formation of the solar system when there was lots of dust and debris floating about before it settled). It was probably squashed flat by UA and space impacts, before it cooled.
And did the FE form like a pancake? Mixing bowl, flour and eggs? Not likely.
Sooooo you don't have an actual answer? How would the earth's edge be so un-irregular if it formed that way? The earth would be more like a splat than a flat disc.
By un-irregular, can I assume you mean regular? The impacts are small compared to earth's total size. Imagine it has been sandblasted flat for 4.5 billion years by space debris. Its a better analogy.
What about the edge? If you think the edge is more or less smooth compared to the Earth, how would it have formed as perfectly as that?
The 'edge' is made of ice. Ice is compacted snow. It falls to make a flat surface. So flat edge.
What was happening when the earth was the size of an upsidown frisbie?
Coagulation of rock is a RET. There is no evidence to suggest the earth is made up of rock from all over the galaxy that collected together by some magic invisible force. It is more likely the earth has always been this size from its inception.Asking about that will be derailment into big-bangs and the existence of God etc. Its up to you.
Its more likely? what evidence do you have that suggests its always been this way?
A huge amount of the rock is 4.5 billion years old suggesting it formed at the same time. Therefore it wasn't gathered from all over the galaxy.
The surface of earth cooled about 4.5 billion years ago, forming the top layer.
How do we know how old the earth is?
Believe it or not, there are clocks in rocks! You can't see them and you need very sophisticated machines to tell time by these clocks. The clocks are naturally radioactive elements, called isotopes, such as uranium.
Radioactive elements change spontaneously to non-radioactive elements. For example, radioactive uranium changes, or decays, to non-radioactive lead. If you start with a certain amount of radioactive uranium (100% U) it takes a certain amount of time for one half of the uranium to become lead (50% U,50% Pb). Then it takes the same amount of time for that half to become one half lead (25% U, 75% Pb), and so on. This is called the half-life, or decay constant; it never changes inside rocks.
Different radioactive elements decay at different rates. Some radioactive isotopes have short half-lives, others have very long half-lives, such as millions or billions of years. This is where you need a fancy machine and laboratory to find out how old Earth is; it is done by actually measuring the very tiny amounts of radioactive elements and their decay products, called the parent and daughter, in rocks. If you know the amount of parent and daughter (such as uranium and lead) in a rock and the decay constant, you can calculate the age of the rock. By measuring parent-daughter ratios for various radioactive elements in many kinds of rocks, and meteorites, we know that Earth formed about 4 and 1/2 billion years ago and that the Sun formed shortly before then.
http://www.ccmr.cornell.edu/education/ask/index.html?quid=182