[Rockhounds] Fossils Reveals How Much Shorter Days Were 70 Million Years Ago

[Paul]

Ancient Shell Has Revealed Exactly How Much Shorter
Days Were 70 Million Years Ago
https://www.sciencealert.com/old-shell-reveals-earth-s-days-were-half-an-hour-shorter-70-million-years-ago

de Winter, N.J., Goderis, S., Van Malderen, S.J., Sinnesael, M.,
Vansteenberge, S., Snoeck, C., Belza, J., Vanhaecke, F. and
Claeys, P., Sub‐daily scale chemical variability in a Torreites
sanchezi rudist shell: Implications for rudist paleobiology
and the Cretaceous day‐night cycle. Paleoceanography
and Paleoclimatology, p.e2019PA003723
https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2019PA003723

Yours,

Paul H.