Glaciation in North America

Mountain uplift and the glaciation of North America – a sensitivity study

The Miocene (∼24 to ∼5 million years ago) was a period of relative global warmth compared to the Quaternary (∼2 million years ago to present; e.g. Zachos et al., 2001) and was characterised by the intermittent glaciation of Antarctica only. Paradoxically, the majority of available proxy data suggest that during the Miocene, pCO2 was similar, or even lower, than the pre-industrial levels (280 pp...

Anomalous negative excursion of carbon isotope in organic carbon after the last Paleoproterozoic glaciation in North America

[1] Early Paleoproterozoic time (2.5–2.0 Ga) spanned a critical phase in Earth’s history, characterized by repeated glaciations and an increase in atmospheric oxygen (the Great Oxidation Event (GOE)). Following the last and most intense glaciation of this period, marine carbonates record a large positive excursion of dC value (termed the “Lomagundi event”) between about 2.2 and 2.1 Ga coincidin...

Admixture in North America

The history of North America has been marked by the encounter of populations from different continents. The discovery of the New World began a period defined by human migrations at a much larger scale than in previous history. This movement of people, voluntary or forced, changed profoundly the human landscape. As populations came into contact, admixture followed in varying degrees depending on...

Medicine in North America

Travel in North America