Mr YEC needs a bit more info.
It's amazing how they just discard what doesn't agree with their view... I've recently thought of this detail and I think I've posted it somewhere else, but here goes a slightly more... err... cited version.
First, let's establish that the simple compass was invented by the chinese in the first millenium BC:
The magnetic compass was first invented as a device for divination as early as the Chinese Han Dynasty (since about 206 BC).[1][2][3] The compass was used in Song Dynasty China by the military for navigational orienteering by 1040-1044,[4][5][6] and was used for maritime navigation by 1111 to 1117.[7]
(follow the citations on the wiki link if you wish)
Then, let's establish that the Earth's magnetic field has been alternating and that alternation is recorded on the rocks that have been formed at that time, the prime example being the Atlantic seafloor, due to the slow but steady creation of new rock at the mid-Atlantic ridge: http://en.wikipedia.org/wiki/Geomagnetic_reversal
Now, if the Chinese had compasses pointing north, like we have today and have never recorded the compasses pointing elsewhere (except in the proximity of a magnetic rock), then the most recent band of magnetized rock on the seafloor has been there since, at least, the first millenium BC.
Just look at how many bands there are, how large they are and it's also possible to measure how fast they're moving away from the ridge and you get a geologic age for the Atlantic Ocean which goes far beyond what any YEC is willing to admit for the age of the planet.
(of course, you weren't there; god made it work much faster than what we measure now because... he didn't have enough time?)
It's amazing how they just discard what doesn't agree with their view... I've recently thought of this detail and I think I've posted it somewhere else, but here goes a slightly more... err... cited version.
First, let's establish that the simple compass was invented by the chinese in the first millenium BC:
The magnetic compass was first invented as a device for divination as early as the Chinese Han Dynasty (since about 206 BC).[1][2][3] The compass was used in Song Dynasty China by the military for navigational orienteering by 1040-1044,[4][5][6] and was used for maritime navigation by 1111 to 1117.[7]
(follow the citations on the wiki link if you wish)
Then, let's establish that the Earth's magnetic field has been alternating and that alternation is recorded on the rocks that have been formed at that time, the prime example being the Atlantic seafloor, due to the slow but steady creation of new rock at the mid-Atlantic ridge: http://en.wikipedia.org/wiki/Geomagnetic_reversal
Now, if the Chinese had compasses pointing north, like we have today and have never recorded the compasses pointing elsewhere (except in the proximity of a magnetic rock), then the most recent band of magnetized rock on the seafloor has been there since, at least, the first millenium BC.
Just look at how many bands there are, how large they are and it's also possible to measure how fast they're moving away from the ridge and you get a geologic age for the Atlantic Ocean which goes far beyond what any YEC is willing to admit for the age of the planet.
(of course, you weren't there; god made it work much faster than what we measure now because... he didn't have enough time?)
