How are the Negro League's parks described in the biography, Oscar Charleston: Was Cobb “The White Charleston”

Most ballparks in the Negro leagues were cavernous places where doubles and triples provided most of the excitement. The conditions of the fields varied, but the infields were almost always rocky and hard— as were most major league infields of the time—and it was commonplace to see a fielder scoop up rocks and debris while he was fielding a ground ball.