Landforms

Question 1

what are the phases of the historical study of landforms?

Answer 1

Phase 1 - exploration of the world (to mid 19th century)
phase 2 - establishment of the discipline - early theories of environmentalism (late 19th century)
phase 3 - dominance of regonal geography (detailed area descriptions - early 20th century)
phase 4 - emergence of human and physical geog - mid 20th century)
phase 5 - physical, integrated and human geography (late 20th century)

Question 2

what was physical geography before 1800?

Answer 2

• Ancient Greeks and Romans were concerned with topographic descriptions of places and maps
• Dark Age Europe merely relied on Greek and Roman texts and rejected anything against the teachings of the church
• Arab geographers were pioneering fieldwork
• Chinese triangulation techniques for mapping

Question 3

The Renaissance 15th and 16th Centuries

Answer 3

• Renewed interest in geographical knowledge of the ancients due to issues of exploration, patriotism and colonization
• Period of major invention and discovery
• Time keeping, mapping and printing
• Importance began to be placed on real-world experience (triumph of experience over authority was central at that time)

Question 4

what is catastrophism and when was it around as a theory?

Answer 4

until 1830s

Ascribes the origin of Earth’s landforms to one or more “catastrophic” themes:

• instantaneous formation during Creation
• formation after Noah’s Flood
• earthquake and volcanic activity

Question 5

who was George Cuvier and what did he explain?

Answer 5

(1769-1832)
french anatomist and paleontologist, explained the patterns of extinction and faunal succession observed in the fossil record.

Question 6

who translated cuvier’s work and linked it with the biblical flood?

Answer 6

Robert Jameson (1774-1854)

Question 7

whats uniformitarianism and when was it around?

Answer 7

1830-1930+
also termed gradialism
‘the present is key to the past’ - coined by William Whewell in a review of Lyell’s book
natural processes shape landforms through gradual changes over long periods of time.

Question 8

uniformitarianism does not include…

Answer 8

the role of catastrophic events. eg volcanic eruptions, meteorite impacts, massive floods.

Question 9

Coming from the Romantic school of thought, WHO believed that “…nature is perfect till man deforms it with care”

Answer 9

Alexander von Humboldt (1769-1859)

Question 10

Who extended uniformitarianism to biology (evoloution) and wrote the book ‘origin of species’ (1859) stating humans and animals were not that different at all?>

Answer 10

Charles Darwin (1809-1882)

Question 11

who suggested the cycle of erosion?

Answer 11

William Morris Davies (1850-1934)

compatible with uniformitarianism

Question 12

what is the davisian cycle of erosion?

Answer 12

1890-1950,
a) young uplifted stage with very limited incision
b) mature stage with deep valley incision and complex topography
c) old eroded landscape with few geographic features
stages = structure, process, time

Question 13

what was the glacial theory?

Answer 13

1840 - louis agassiz
multiple glaciations
most of northern america, n europe, n asia had been covered in ice sheets later termed the pleistocene

Question 14

who wrote ‘The Great Ice Age and its Relationship to the Antiquity of Man’

Answer 14

James Geike, 1874

Question 15

who was Grove Karl Gilbert?

Answer 15

(1843-1918)

• American geologist who joined the famous ‘Powell Survey’ in Rocky Mountain Region in 1874
• Recognized importance of describing physical processes and systems of laws (using quantitative methods)
• Proposed concept of dynamic equilibrium
• Detailed analysis of fluvial processes in his work ‘Geology of the Henry Mountains’ (1877)
• Gilbert’s ideas did not become popular until 1950s

Question 16

when was the quantitative revoloution?

Answer 16

1950s, a period of global moderntiy (science driving society)
Arthur Strahler (1918-2002) argued the need for physically-based real-world measurements (opposed to Davis)
Move towards quantitative and statistical approaches

Question 17

what is the ‘Strahler Stream Order’

Answer 17

1952, a system developed for classifying streams according to the power of their tributaries

Question 18

what is the ‘equilibrium concept’

Answer 18

Hack 1960 realised -

• Rather than a single long Davisian erosion process there is a more dynamic set of processes (non-cyclic)
• Rejuvenated Gilbert’s concepts of dynamic equilibrium
• often depends where and when you measure something as to whether it shows equilibrium

Question 19

what are the 3 timescales of equilibrium?

Answer 19

(a) dynamic equilibrium, 10,000 years (cyclic time);
b) steady-state equilibrium, 100 years (Graded time);
(c) static equilibrium, 0.1 years (static time)

Question 20

who proposed the climatic geomorphology?

Answer 20

Julius Büdel (1903-1983)

Question 21

what are the 3 types of geomorphology?

Answer 21

- Historical geomorphology
Catastrophism and Uniformitarianism
- Process geomorphology
Gilbert and Strahler
- Climatic geomorphology
Büdel

Question 22

what sociologist tried to distinguish science from religion?

Answer 22

Auguste Comte (1820s)

Question 23

response to large events depends on….

Answer 23

the time since the last event (relaxation time)

• a large flood event may carry less sediment because a first flood flushed it all out
• ecosystem disturbance causes species to decline - needs sufficient time to recover to original levels.
• environmental response to a particular event depends on the sensitivity of the particular environment.

Question 24

historical overview - what hapenned in 1950s?

Answer 24

Quantitative revolution (positivist science)

Question 25

historical overview - what hapenned in 1970s?

Answer 25

cause - effect relationships became the focus

Question 26

historical overview - what hapenned in 1990s?

Answer 26

realism (importance of case studies) proposed alternative to the problems of positivism