🔬 Discovery

Avicenna on mountain formation and strata

Formación de montañas y estratos según Avicena

Date
c. 1027 · confidence medium
Place
Hamadan and Isfahan, Iran
Credited to
Ibn Sina (Avicenna)
People
👤 Avicena980–1037
Field
Cosmos & Earth

What was discovered

In the Kitab al-Shifa he explains mountains as formed by uplift and by erosion from water and wind, recognises that marine fossils indicate ancient seas, and describes deposition in layers over very long periods.

The section on minerals circulated in Latin as De congelatione et conglutinatione lapidum, attributed for centuries to Aristotle. It anticipates ideas that Steno formulated in 1669.

What it led to

  • concept of long geological time
  • theory of the petrification of fossils
  • medieval Latin geology (De mineralibus)
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Made possible

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