Age Quote by Avicenna
![“Mountains have been formed by one [or other] of the causes of the formation of stone, most probably from agglutinative clay which slowly dried and petrified during ages of which we have no record. It seems likely that this habitable world was in former days uninhabitable and, indeed, submerged…” quote by Avicenna](https://sms4smile.com/quotes/img-quotes/4ce/avicenna-19211_age_mountains-have-been-formed-by-one-or-oth_1402208.jpg)
“Mountains have been formed by one [or other] of the causes of the formation of stone, most probably from agglutinative clay which slowly dried and petrified during ages of which we have no record. It seems likely that this habitable world was in former days uninhabitable and, indeed, submerged beneath the ocean. Then, becoming exposed little by little, it petrified in the course of ages.”
![“Evidence of this [transformation of animals into fossils] is that parts of aquatic animals and perhaps of naval gear are found in rock in hollows on mountains, which water no doubt deposited there enveloped in sticky mud, and which were prevented by coldness and dryness of the stone from…” quote by Albertus Magnus](https://sms4smile.com/quotes/img-quotes/5a7/albertus-magnus-39861_animal_evidence-of-this-transformation-of-anima_3017159.jpg)
![“Pure earth does not petrify, because the predominance of dryness over [i.e. in] the earth endows it not with coherence but rather with crumbliness. In general, stone is formed in two ways only (a) through the hardening of clay, and (b) by the congelation [of waters].” quote by Avicenna](https://sms4smile.com/quotes/img-quotes/4b0/avicenna-19211_clay_pure-earth-does-not-petrify-because-the_878916.jpg)
