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 . 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.