What we know today as Sabino Canyon was the site of a whole lot of scrunching 25 million years ago. In a geologic nutshell: Two ancient types of rock - 1.4-billion-year-old Oracle granite and ...

Jesse Reimink, a postdoctoral associate at DTM, will give a talk titled, "Early terrestrial crust formation: petrogenesis of the oldest rocks within the Acasta Gneiss Complex", at 11 a.m. on Thursday, ...

NASA has pulled off a high-flying aurora investigation, launching three rockets into the glowing northern lights over Alaska. One mission targeted mysterious dark patches called black auroras, while ...

There are various types of body composition tests (more on these below). Still, each one measures the percentages of fat and fat-free mass (muscle and bone) in the body. Knowing these percentages can ...

What is the Swain Biotite Gneiss and Why Does it Matter? The Swain Biotite Gneiss represents a fascinating metamorphic formation with outsized geological importance despite its limited geographic ...

The Skagit Gneiss Complex represents one of North America's most fascinating geological formations, providing geologists with an exceptional window into deep crustal processes that shaped the western ...

Scientists recently unveiled the nation's newest "oldest known" rock — discovered in Michigan's Upper Peninsula. Michigan, Minnesota and Wisconsin all feature ancient rocks known as gneisses — ...

Geologist Michael Ackerson holds a sample from Canada's Acasta Gneiss formation, home to some of the oldest rocks on the planet. Michael Ackerson We know Earth is old. Scientists estimate that our ...

In a recent study, geologists say Michigan is home to the oldest known rock in the nation. Watersmeet gneiss is found in Michigan's Upper Peninsula. Minnesota's Morton gneiss previously held the title ...

A weathered sign in the Minnesota River Valley proudly proclaims: “World’s Oldest Rock.” Erected in 1975, it marks a 3.8-billion-year-old gneiss — or so scientists thought. Turns out, it’s not the ...