I disagree. The idea that the world is billions of years old is a recent understanding.
I think most of the ancients would be astonished to learn that it was that old. But since the Bible doesn't say how old it is, Christians never made that an article of faith.
As far as the flood being worldwide, it was and the Biblical authors understood it as worldwide.
There is one Author to the Bible, and He doesn't say it's worldwide.
As far as evidence, there is ample evidence that the flood was global.
So far, no one's shown me.
You simply refuse to do your research on the matter because you've got so much time invested in old earth. Your heart is hard in this matter.
God has a lot of time invested in it, too. But it's not something that a heart can be hard or soft on. It's just a scientific question, not a religious one. At least it isn't for Christians.
The idea of plate tectonics was first brought up by a Young Earth advocate
No, the idea of moving continents was first brought up by Abraham Ortels in the 1500s, but plate tectonics was first formulated in the 1960s. Young Earth creationists appeared in the early 1900s, but none of them had the training or the data to work out plate tectonics.
http://www.answersingenesis.org/arti...late-tectonics
First, they got the story wrong about who first surmised that continents move. Second, they conflated the ideas about continental drift and plate tectonics.
And last, they don't seem to realize the process is still going on, a few centimeters a year. You see, if it had happened in the flood year, all that energy would have to be removed as heat. The oceans would have cooked everything.
I can work up the calculations, if you like.
BTW, Columbus' voyage was about 8 meters shorter in 1492, than it would be today.