Facts: - death place: stuttgart , germany - residence: austria-hungary , argentina , ottoman empire , germany - citizenship: germany - work institutions: direccion general de minas - death date: 29 september 1923 - field: geomorphology - birth date: yes 30 august 1888 - name: walther penck - image size: 250px - nationality: german - birth place: vienna , austria-hungary Based on these bullet points, write a short biography describing the life of walther penck .
The answer to this question is:
walther penck -lrb- 30 august 1888 -- 29 september 1923 -rrb- was a geologist and geomorphologist known for his theories on landscape evolution .penck is noted for criticizing key elements of the davisian cycle of erosion , concluding that the process of uplift and denudation occur simultaneously , at gradual and continuous rates .penck 's idea of parallel slope retreat led to revisions of davis 's cycle of erosion .