FACE OF THE EARTH

Duration: 29 min

Year Published: 1957

Creator: Produced by KQED. Kinescopes

Format: 16mm

Color: B&W

Sound: Sound

Description: Titles are: 1. TIME & TOOLS: INTRODUCTION. Provides an introduction to the series. Explains the various tools used by the geologist and the importance of time in the study of the earth. Shows ways that the face of the earth is 'unchanging' yet 'ever-changing.' Identifies five types of present day clues used to understand the changes in earth history. 2. PLAIN DIRT. Explains the physical and chemical processes of weathering. Shows how rock is converted from soil and then reconverted to rock. Discusses these processes as they relate to the changing nature of the earth's surface. 3. EROSION. Describes the work of water in forming the fine features of the earth. Explains the hydrologic cycle. Shows the mechanics of water as it erodes and moves materials over the surface eventually forming valleys, canyons, plains, and deltas. 4. THE RIVER. Shows erosive characteristics of rivers. Explains where they are formed and how they differ in size, motion, and shape. Shows why rivers meander thus producing river cycles. Demonstrates the behavior of a variety of great rivers with a miniature laboratory river. 5. SCULPTURING OF THE LAND. Reviews early concepts concerning the formation of mountains and valleys. Discusses the various factors which bring about erosion. Shows the evolution of a valley as it proceeds through the stages of youth, maturity, and old age. Explains the rate of land destruction by water on the surface of the earth as it continually is lowered and raised again. 6. GLACIAL. Explains how glaciers are formed. Discusses three types of glaciers and their movement. Demonstrates how glaciers sculpt the surface of the earth. Points out areas on the earth's surface where glaciers are at work. Asks the audience to seek evidence of glacial work in the geologic past. 7. THE SEACOAST. Demonstrates how ocean waves shape the seacoast. Explains the action in ocean water that forms beaches, spits, and sea cliffs. Outlines the development of the shoreline through its various stages of change from youth through maturity and finally old age. 8. SEDIMENTATION. Shows how nature makes a solid rock through the compaction of loose sediment and silt under great pressure. Explains how age of rocks is determined. Shows how fossils are being used in identification of animals. Discusses changes in land mass of North America as a result of great sedimentation during the geologic past. 9. BREAKING AND BENDING. Explains the factors which hold the earth in place, and the mechanics whereby rock may be folded and faulted. Discusses the relationship of erosion to the breaking and folding of the earth's crust in forming land masses. 10. MOUNTAIN BUILDING. Explains the formation of mountains with a description of sedimentary rock, deformation, and the final uplifting. Concludes with a summary of the cycle of land building

Complete Record: Source: NET Interest level: jh-sh-ad Price: rent ea $4.75 Format: sd b&w

Metadata Source:Educational film guide. Supplements (1959-62)