Geological History - Earth Discover

Main image: A photograph taken in 1872 showing boats moored along Marble Canyon. Inset: A photograph of John Wesley Powell alongside a Native American named Tau-gu. Both photos were taken during Powell's second expedition down the Grand Canyon.

1869: John Wesley Powell – Unveiling the Geologic Majesty of the Grand Canyon

John Wesley Powell's groundbreaking expeditions in the late 19th century illuminated the vast geological history of the Grand Canyon, revealing its intricate layers and making it a central figure in geological studies

Main image: A letter and sketch from 1823 by Mary Anning announcing the discovery of Plesiosaurus fossils. Inset: A portrait of the nineteenth-century geologist Mary Anning, with her rock hammer, sample bag, and her dog Tray.

1811: Mary Anning – Unveiling Earth’s Ancient Secrets Through Fossils

Mary Anning's groundbreaking fossil discoveries in the 19th century, including the first ichthyosaur, plesiosaurus, and British pterosaur, played a crucial role in supporting the concepts of deep time and stratigraphy, highlighting the significance of fossils [...]

Aerial view of Meteor Crater, a ¾ mile (1.2 kilometers) wide hole in the Arizona desert formed approximately 50,000 years ago by the impact of a small iron-rich asteroid traveling at speeds exceeding 6 miles (10 kilometers) per second

c. 50,000 BCE: Arizona’s Meteor Crater – A Window into Earth’s Impact History

Meteor Crater near Flagstaff, Arizona, is a pristine geological site formed 50,000 years ago by an asteroid impact, offering insights into Earth's history with extraterrestrial collisions