It was long ere the distinct nature and legitimate objects of geology were fully recognized, and it was at first confounded with many other branches … - Charles Lyell

The most remarkable work of that period was published by Steno... The treatise bears the quaint title of 'De Solido intra Solidum contento naturaliter (1669,)' by which the author intended to express 'On Gems, Crystals, and organic Petrifactions enclosed within solid Rocks.' ...Steno had compared the fossil shells with their recent analogues, and traced the various gradations from the state of mere calcification, when their natural gluten only was lost, to the perfect substitution of stony matter. He demonstrated that many fossil teeth found in Tuscany belonged to a species of shark; and he dissected, for the purpose of comparison, one of these fish recently taken from the Mediterranean. That the remains of shells and marine animals found petrified were not of animal origin was still a favorite dogma of many, who were unwilling to believe that the earth could have been inhabited by living beings long before many of the mountains were formed.

The earliest doctrines of the Indian and Egyptian schools of philosophy agreed in ascribing the first creation of the world to an omnipotent and infinite Being. They concurred also in representing this Being, who had existed from all eternity, as having repeatedly destroyed and reproduced the world and all its inhabitants. ...We have no right to refer to mere chance the prevailing notion that the earth and its inhabitants had formerly undergone a succession of revolutions and catastrophes, interrupted by long intervals of tranquility.

For many years after the promulgation of Lamarck's doctrine of progressive development, geologists were much occupied with the question whether the past changes in the animate and inanimate world were brought about by sudden and paroxysmal action, or gradually and continuously by causes differing neither in kind nor degree from those now in operation.