Revisiting Day One of the Cenozoic Era

Guest geology by David Middleton Cenozoic Era: The Era of New Life Who would have ever guessed that details about the first day of the Cenozoic Era might have been preserved the stratigraphic record? Sep 09, 2019Rocks at Asteroid Impact Site Record First Day of Dinosaur Extinction AUSTIN, Texas — When the asteroid that wiped…

Advertisements

Middle Miocene Volcanism, Carbon Dioxide and Climate Change

Guest geology lesson by David Middleton What’s wrong with the following paragraph? In Late Jurassic-Early Cretaceous times, Gondwana was split apart, and as rift volcanism and sea-floor spreading developed, ocean temperatures rose and ocean waters were enriched with nutrient elements from volcanic outpourings (along mid-ocean ridges and continental margins or island arcs). Oxygen-isotope analyses of…