what are the 2 observations about earth that weren't properly explained by the "land bridge" theory?

Question

and how did alfred wagner account for these observations?

Answer 1

Depth of the Ocean floor between Africa and Australia.
Rock formations being different between Africa and Australia whilst being consistent between Africa and South America.

Answer 2

On my observation,
1) the sink hole in Hawaii and its ring of fire that surrounds them where an indications that the big meteorites hits.
2) the land mass of both sides of the earth that is almost identical in form ( North, Central and South Americas and Europe, Asia and Australia )