Acasta Gneiss with Annie Bauer

 A lot of people, including many non-geologists (even Beyoncé), are aware of the famous detrital Hadean zircons from the Jack Hills of Western Australia, which represent the oldest terrestrial minerals yet found (up to 4.37 Ga). The oldest crystalline basement rocks are arguably an equally important source of information regarding Earth’s earliest history. During my […]


Labrador has a fabulous diversity of geology. It has rocks as old as 3.8 billion years old to the present. In addition to rocks, Labrador also is known for:   Bears… Wide expanses of pine trees… Blueberries!   Most of the best exposures in Labrador are to be found in quarries. These quarries are large […]