An alternative form of geogonic; relating to Earth's origin and formation.
From geogonic plus -al suffix, creating an adjective variant common in older scientific literature. The -al ending emphasizes the character or nature of something relating to geogony.
Scientists in the 1700s and 1800s produced dozens of 'geogonical' theories—each one explaining how mountains formed, why continents existed, and whether Earth was cooling or heating, making it the adjective of choice for speculative Earth history.
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