Most meteorites are fairly small, with the largest ever discovered only a few meters across.
It is very likely that the Earth was bombarded by large asteroids in the past, as well as many smaller asteroids and meteorites, yet there is a dearth of asteroid craters on our planet. When cut open, polished and then etched with an acid, many iron meteorites display crystal-like structures in the metal called Widmanstatten patterns. The answer is no for a couple of reasons. First, objects 100 km across would not be considered meteors, but rather asteroids, regardless of their origin or composition. There really isn't any universally accepted definition of the size boundary between asteroids and meteoroids, although we might consider anything 5 -10 meters across or larger an asteroid, and anything smaller a meteoroid.