GEOMORPHOLOGY

1. Geomorphologyis a scientific discipline concerned with the description and classification of the Earth’s topographic features. Much geomorphologic research has been devoted to the origin of landforms. Such studies focus on the forces that mold and alter the primary relief elements of the terrestrial surface. These forces include tectonic activity and surficial earth movements (e.g.,landslides and rockfalls). They also involve weathering and the erosion and deposition of the resulting rock debris by wind, glacial ice, and streams. In recent years, increasing attention has been given to the effects of human action on the physical environment as well.

2. Many systems of classifying landforms have been developed since the late 19th century. Some systems describe and group topographic features primarily according to the processes that shaped or modified them. Others take additional factors into consideration (e.g., character of the surface rocks and climatic variations) and include the developmental stage of landforms as an aspect of their evolution over geologic time.

3. Geomorphology is closely allied with a number of other scientific disciplines that are concerned with natural processes. Fluvial and coastal geomorphology rely on fluid mechanics and sedimentology; studies of mass movement, weathering, wind action, and soils draw on the atmospheric sciences, soil physics, soil chemistry, and soil mechanics; research on certain landform types entails the principles and methods of geophysics and volcanology; and the study of human impact upon landforms relies on the disciplines of geography and human ecology.

Comprehension check

Ex.1. Make the right choice.

1) I think he isn’t a … person, he so often breaks his word.

a. rely; b. reliable; c. relied; d. reliably.

2) The results of our experiment rely … on the equipment.

a. hard; b. heavy; c. hardly; d. heavily.

3) Bioengineering includes the … and fabrication of life-support systems for different missions.

a. developmental; b. developing; c. developed; d. development.

4) … is composed of particles of broken rock that has been altered by chemical and environmental processes that include weathering and erosion.

a. rock; b. soil; c. lithosphere; d. sediment

5) … comprises a geomorphological unit, and is typically an element of topography.

a. landscape; b. environment; c. landform; d. nature

6) He is researching the effects of aerosols on the ….

a. nature; b. landscape; c. environment; d. wildness

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