WikiVisually
The entire wiki reimagined as a visual magazine with video discovery · Watch your interests come alive
WikiVisually
The entire wiki reimagined as a visual magazine with video discovery · Watch your interests come alive
Nature The World Movies USA Top Art Fine & Rare History Ivy & Inquiry
Great Unconformity
Videos
The Great Unconformity is the unconformity observed by John Wesley Powell in the Grand Canyon in 1869. It is an exceptional example of relatively young sedimentary rock strata overlying much older sed
Geologic stratigraphic column of strata exposed in and near the Grand Canyon
Geologic stratigraphic column of strata exposed in and near the Grand Canyon
Powell's Unconformity viewed from Lipan Point on the South Rim. Rocks of the Unkar Group of the Grand Canyon Supergroup are truncated at the base of t
Powell's Unconformity viewed from Lipan Point on the South Rim. Rocks of the Unkar Group of the Grand Canyon Supergroup are truncated at the base of the Tonto Group.
Powell's Unconformity seen from Hopi Point on the South Rim. Steeply foliated and veined schists of the Vishnu Basement Rocks truncated at the base of
Powell's Unconformity seen from Hopi Point on the South Rim. Steeply foliated and veined schists of the Vishnu Basement Rocks truncated at the base of the Tonto Group.
An exposure of Powell's Great Unconformity, west of Montezuma, New Mexico
An exposure of Powell's Great Unconformity, west of Montezuma, New Mexico
Snowball Earth
Videos
The Snowball Earth is a geohistorical hypothesis proposing that during one or more of Earth's icehouse climates, the planet's surface was nearly entirely frozen, with little or no liquid water exposed
Great Unconformity
…event which took place during the Neoproterozoic, starting around 720 million years ago. This is also when a significant glaciation event known as Snowball Earth occurred. Snowball Earth periods covered almost the entire planet with ice. The areas that underwent glaciation were approximately those where the Great…
Artist's rendition of a fully frozen Snowball Earth with no remaining liquid surface water
Artist's rendition of a fully frozen Snowball Earth with no remaining liquid surface water
Diamictite of the Neoproterozoic Pocatello Formation, a "snowball Earth"-type deposit
Diamictite of the Neoproterozoic Pocatello Formation, a "snowball Earth"-type deposit
Elatina Fm diamictite below Ediacaran GSSP site in the Flinders Ranges NP, South Australia. A$1 coin is for scale.
Elatina Fm diamictite below Ediacaran GSSP site in the Flinders Ranges NP, South Australia. A$1 coin is for scale.
2.1 billion-year-old rock with black-band ironstone
2.1 billion-year-old rock with black-band ironstone