Takes the same shape of the plant or animal. The space is sometimes filled with mud. The mud hardens and turns into rock. Cast are often made from a mold. The inside of the sedimentary rock isn't hollow.
American Bandstand, 1957. Dick Clark became host of the locally-produced Bandstand in 1956, just before the show was renamed American Bandstand, shortened to ninety minutes, and expanded to a national ABC audience on August 5, 1957.
American Bandstand began as a local program on WFIL-TV (now WPVI), Channel 6 in Philadelphia on October 7, 1952. Then it was hosted by Bob Horn and was called Bob Horn's Bandstand.On July 9 of 1956 the show got a new host, a clean-cut 26 year old named Dick Clark. When ABC picked the show up, it was renamed American Bandstand, airing it's first national show on August 5, 1957. The show was moved to Los Angeles in 1964.