Taken near the entrance of Hawai`i Volcanoes National Park (which is now closed) on May 15, 2018, at 11:28 am.
MORTON GNEISS
Morton, Minnesota
Oldest Rock in the United States — 3.524 billion years old
MORTON GNEISS
Morton, Minnesota
Oldest Rock in the United States — 3.524 billion years old
Kilauea Volcano
10 Questions About the Earth—
and the Geology of North America.
Science — History — Biography
KILLARNEY PROVINCIAL PARK, ONTARIO
First Snowball Earth
Transition from Archean to Proterozoic Eons
2.5 billion years ago
The high-standing ridges of the Lorrain Formation of the La Cloche
Mountains and the lake-filled valleys of the easily eroded rocks of the
Gowganda Formation. The transition from the Archean to the Proterozoic Eons runs between them. (Photo by Mrspaceweb)
La Cloche Mountains (Photo by Ryan Hodnett)
Quartzite ridges of the Lorrain formation on the La Cloche Silhouette Trail (Photo by Mensilater)