Rocks that reveal the past

Duration: 0:11:58

Genre: Educational

Year Published: 1962

Creator: Film Associates of California: Distributor | Indiana University Audio-Visual Center: Distributor

Format: 16mm

Color: Color

Sound: sound

Description: Describes sedimentary rocks, their formation, and their importance as a record of the past. Pictures the weathering process, the deposit of sediments, and the formation of rock. Discusses four different kinds of fossils--imprints, actual remains, mineralized, and casts. Illustrates how fossils of plants and animals aid geologists in their study of the history of life on earth. Depicts the Grand Canyon as an ideal location to study the deposition of sediments., Explains that layered or sedimentary rocks often contain fossils. Discusses the value of fossils and sedimentary rocks in helping scientists to reconstruct the past. Points out the importance of the Grand Canyon where rock layers have remained undisturbed for a billion years.

Complete Record: , Describes sedimentary rocks, their formation, and their importance as a record of the past. Pictures the weathering process, the deposit of sediments, and the formation of rock. Discusses four different kinds of fossils--imprints, actual remains, mineralized, and casts. Illustrates how fossils of plants and animals aid geologists in their study of the history of life on earth. Depicts the Grand Canyon as an ideal location to study the deposition of sediments., NOTE: Two (or more) records have been merged together to create this data.