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DEPOSITIONAL AND GEOCHEMICAL CYCLICITY IN THE CRETACEOUS FINE-GRAINED STRATA OF COLOMBIA. A MODEL FOR ORGANIC MATTER CONTENT

open access: yesCT&F Ciencia, TecnologĂ­a & Futuro
Spectral analyses of depositional and geochemical time series were conducted on three stratigraphic sections of the Cretaceous Vil I eta Group, Colombia.
T. VILLAMIL
doaj  

Global cooling drove diversification and warming caused extinction among Carboniferous-Permian fusuline foraminifera. [PDF]

open access: yesSci Adv
Zhang SH   +13 more
europepmc   +1 more source

Obliquity disruption and Antarctic ice sheet dynamics over a 2.4-Myr astronomical grand cycle. [PDF]

open access: yesSci Adv
Sullivan NB   +15 more
europepmc   +1 more source

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