Tue, Apr 5, 2022
Approximatly 600 million years ago a 9 kilometer wide asteroid stuck what is now Idaho, then attached to Antarctica. Its impact through debris up to two thousand kilometers away leaving a crater 60 km wide and 12 km deep. This fifth largest known impact may have contributed to the End-Ediacaran extinction which preceded the Cambrian explosion.
Wed, Apr 12, 2023
The Hawaiian Islands are one of several island chains in the Pacific Ocean that were formed by volcanoes associated with hot spots as the Pacific Tectonic Plate moved. But there are noticeable bends in the island chains' dating to about 45 million years ago. Geologists have several hypotheses about why this happened.
Sun, Apr 23, 2023
The author posits that a massive asteroid impact that created the hypothesized Wilkes Land Crater under the Antarctic ice may have caused the formation of the Siberian traps that lead to the mass extinction know as the Great Dying, An asteroid impact on the planet Mercury caused a similar effect antipodal to the impact location.
Sun, Jun 4, 2023
During the Crygenian Period the earth was largely covered with thick ice. Geologists suspect that the ice sheets caused so much erosion that they swept over a billion years worth of deposited rock into the oceans. The result is the Great Unconformity where 520 million year old sandstone appears directly over 1.7 billion year old rock in places like the Grand Canyon.