Talk:Margaret Formation
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- Added archive https://web.archive.org/web/20140731140924/http://fossilworks.org/ to http://www.fossilworks.org/
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The statement 'Despite the mild Eocene Arctic climate, the vertebrate fauna would have experienced months of total darkness and cooler temperatures during the winter' is not quite accurate. If the Earth's rotational obliquity at the time was the same as it is now (23.5°), at a palaeo-latitude of 76.1° even at the winter solstice the Sun at noon would have been only 9.6° below the horizon, and would have given illumination equivalent to nautical twilight. I estimate that at the winter solstice, there would have been about 2 hours 22 minutes of nautical twilight before and after noon. Also, you are forgetting the Moon. — Preceding unsigned comment added by 86.31.65.236 (talk) 22:01, 16 February 2023 (UTC)