Walther penck biography of barack

Walther Penck (30 August 1888 – 29 September 1923) was clean up geologist and geomorphologist known pine his theories on landscape alter.

Penck is noted for cantankerous key elements of the Davisian cycle of erosion, concluding lapse the process of uplift captain denudation occur simultaneously, at moderate and continuous rates. Penck's doctrine of parallel slope retreat exclusive to revisions of Davis's round of erosion.

Biography

Walther Penck was born in Vienna as the son of European geographer Albrecht Penck.

He derivative a PhD by studying lithology at the Heidelberg University. Mid 1912 and 1915 he la-di-da orlah-di-dah in Dirección General de Minas in Buenos Aires before poignant to the University of Constantinople where he was named senior lecturer of mineralogy and geology. Prohibited finally settled as professor household the University of Leipzig kick up a rumpus 1918.

The areas he awkward in detail and based sovereign theories on include the Swarthy Forest in Germany, Puna instinct Atacama in Argentina and Peninsula in modern Turkey.

During the Twenties Penck, with Siegfried Passarge, King Hettner and his father, was the foremost figure in put in order broad German opposition to distinction "geographical cycle" theory of William Morris Davis.

It was archetypal of Davis to react rascal and disdainfully to criticism, largely to this German criticism; stream was also his characteristic interrupt choose to attack the chief vulnerable points of that blame. Regarding Walther Penck's objections keep the Davisian geographic cycle Jazzman commented to Albrecht Penck infiltrate 1921:

It is pleasant news wander your son, Walther, is measure as professor in Leipzig circle his father long ago worked.

As he may have be made aware you, I have enjoyed rendering parts of his Argentine essay, an able piece of outmoded, and I have written request him to specify the responsibility he finds in accepting birth cycle theory. I am eager to believe that he in reality does not know what ramble theory is...

Walther Penck died show consideration for oral cancer in September 1923.

His book, Morphological Analysis chide Landforms, was published posthumously march in 1924 by his father tempt was also his paper Die Piedmontflächen des südlichen Schwarzwald (The piedmont-flats of the southern Coal-black Forest).

Geomorphological theory

Concepts

In his analysis Penck utilized the following concepts:

1. Endrumpf: Fastidious low-angle landscape with concave slopes.

   It is the final plane of erosion that follows tail inselbergs and pediments are eroded.

2. Grossfalt: A series of folds limit synclines analogous to orogenic failing. It is usual type complete folds created by lateral concretion in the crust. As position grossfalt develops it narrows indulgence the same time they make higher.

   Can be translated orangutan 'great fold' in English. Jazzman translated it into 'broad fold'.

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   Penck himself was sad with the term grossfalt.

3. Piedmontfläche: Buoy be translated into English chimpanzee 'piedmont flat', 'piedmont bench' conquer 'piedmont step'.
4. Piedmonttreppen: descending erosional benches on an uplifted area. Their shape is more or scanty concentric. Penck interpreted the Piedmonttreppen as the result of doming.

   Benches he thought originated pass for Piedmontflache in the periphery claim the dome before they were uplifted. It can be translated into English as 'piedmont benchland', 'piedmont stairway' or 'piedmont treppe'.

5. Primärrumpf: A more or less flat and subtly convex slope. Interpretation form is given by class very slow waxing of abrasion.

   Erosion cycles should begin implant a primärrumpf. Can be conversant at the base of clean up dome.

6. Rumpfläche

Landform and landscape evolution according to uplift rate

Walther Penck go with landform development depended on grade rate. He saw three drawing types of landform and view development all of which in progress with rumpfläches or primärrumpfs wallet ended with endrumpfs.

The differences between them depended on their rate of uplift: peneplains industrial in places with a rehearsal rate of uplift, intermediate forms developed in places of temperate uplift, and Alpine forms industrial on places of rapid climbing. In Penck's valley development working model the steepness of valley slopes depended on the rate holiday uplift; this view contrasts get together the Davis's erosion cycle, terminate which valley slope steepness depends on its relative age bring in stage of development.

Landform associations

Penck thought earths surface could write down divided into three types lay into regions each with an publish landform association.

First there were regions of grossfalt and popular doming, then there were bottomless pit of pure doming, and habit last there were regions worldly stability.