page_title: Giovanni Targioni Tozzetti
hierarchical_section_title: Giovanni Targioni Tozzetti
caption_attribution_description: Giovanni Targioni-Tozzetti. Line engraving. Iconographic Collections Keywords: portrait prints; engravings; Giovanni Targioni-Tozzetti
context_page_description: Giovanni Targioni Tozzetti was an Italian naturalist. He was supervisor of the Orto Botanico di Firenze in Florence succeeded by Saverio Manetti. Apparently met Caso Umbria in the 1730s. After the age of catastrophic, to give strong evidence on geomorphological activities occurring on earth, he postulated that the irregular courses of the rivers
  depended on the nature of rocks through which they
  flow. The regions of massive and resistant rocks
  maintain deep and narrow courses whereas
  broad and meandering courses are developed in the
  regions of soft and less resistant rocks. Thus, this
  concept gives the glimpse of differential erosion.
context_section_description: Giovanni Targioni Tozzetti (Florence, 11 September 1712 - Florence, 7 January 1783) was an Italian naturalist. He was supervisor of the Orto Botanico di Firenze in Florence succeeded by Saverio Manetti. Apparently met Caso Umbria in the 1730s. After the age of catastrophic, to give strong evidence on geomorphological activities occurring on earth, he postulated that the irregular courses (symmetry
  and asymmetry of the valleys) of the rivers
  depended on the nature of rocks through which they
  flow. The regions of massive and resistant rocks
  maintain deep and narrow courses (valleys) whereas
  broad and meandering courses are developed in the
  regions of soft and less resistant rocks. Thus, this
  concept gives the glimpse of differential erosion.
caption: Portrait. Credit: Wellcome Collection
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