Hi Pahu,
As RAZD said, you're references are wrong (and the creationist site you took this from is lying to you). Let's do some calculations to show why:
Currently, the estimated flux to the surface of the Earth is 3 x 10^7 kg /year (Love and Brownlee 1993 Science 262:550-553). This number is estimated from the actual number of things we see fall to the surface of the Earth per year, i.e., it's observed. Not much room for doubt there!
This rate has been steady within error for the last 3.8 billion years. Thus, we would expect 3 x 10^7 kg /yr * 3.8 x 10^9 yrs, 1.14 x 10^17 kg of meteoritic dust to have fallen.
The surface are of the Earth is 4 Pi R^2, where R is the radius of the Earth. The radius of the Earth is ~6400 km, so the surface area of the Earth equals 5 x 10^14 m^2.
This means that over the last 3.8 billion years, we would expect
1.14x 10^17 kg / 5 x 10^14 m^2 = 220 kg of meteoritic dust per m^2 of the Earth.
The density of meteoritic dust is about 3000 kg/m^3, so this suggests that in the last 3.8 billion years, we should see all of:
220 kg/m^2 / 3000 kg/m^3 = 0.07 m
7 cm of dust! That's a far cry from 16 feet!
Additionally, the nickel content of meteoritic dust is about 1 weight percent. So for the total amount of nickel delivered by this dust should be about 1 x 10^15 kg of nickel should have fallen to the Earth. The present day nickel content of the Earth's crust is about 2.3 x 10^18 kg (100 ppm in crust, times 2.367 x 10^22 kg mass of the crust), so all that meteoritic dust is barely a blip (about 0.05% of the total nickel of the Earth's crust).
All these calculations assume that there has been no mixing on the Earth. That's definitely not the case- most ocean rocks are
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