Tag Archives: late Cretaceous

Early September Organic Feast!

Of all the particles in a sedimentary basin, organics are arguably the most insightful. Think about it: they tell you how hot things got, millions and millions of years ago, and that is both within the basin at depth but also at the surface when they were deposited; they tell you what plants were evolving; […]

Leave a comment Continue Reading →

High up in Colombia

The lyrics of Neil Young* were going through my head as we trundled down the decline of a mineshaft at 3000 m elevation. We had left the brilliant blue skies of the Andean cordillera moments before, plunging into the darkened tunnel; we were headed for the Guaduas Formation (Late Cretaceous – Paleocene), which contains some […]

Leave a comment Continue Reading →