Not a Crater

Not Every Circular Depression in the Ground Is a Meteorite Impact Crater

In fact, most of them are not. There are several geologic (karst, glacial kettle), as well as anthropogenic (man-made), processes that make circular depressions in the ground. 

Most meteorites hit the ground at terminal velocity, about 200-400 miles per hour. That’s not fast enough to make a crater unless the rock is large (>meter size? I really don’t know).