What was the Alleghanian orogeny?

The Alleghanian orogeny was a major geological mountain-building event that formed the Appalachian and Allegheny Mountains between 325 million and 260 million years ago. Triggered by the collision of Africa with North America, this tectonic event helped assemble the supercontinent Pangaea. Over subsequent eras, extensive erosion wore down these once-towering peaks and distributed their sediments across surrounding regions.

What we know

• The Alleghanian orogeny occurred approximately 325 million to 260 million years ago during the Carboniferous to Permian periods. [2]
• The mountain-building event was caused by the collision of Africa with North America, which formed the supercontinent Pangaea. [2, 3]
• The term and spelling Alleghany orogeny was originally proposed by H.P. Woodward in 1957. [2]
• Geological evidence of the Alleghanian deformation extends from Alabama northward to New Jersey and into Newfoundland. [2]

Where to go next

• what caused itHow did the collision of Africa and North America form Pangaea?
• what followedHow did subsequent erosion shape the modern Appalachian landscape?
• how it workedWhat are folded and thrust faulted marine sedimentary rocks?
• how we knowWhere can surface evidence of the Alleghanian orogeny be observed today?
• the bigger pictureWhat are orogenies and how are they classified globally?
• an unexpected connectionHow are the Appalachian Mountains linked to mountains in Morocco?The plate collisions that built the Appalachians also placed neighboring Anti-Atlas mountains near the center of Pangea.

Sources

• [1]Alleghanian orogeny (Wikidata Q1761223) · CC0 1.0
• [2]Alleghanian orogeny · CC BY-SA 4.0
• [3]Geology of the Appalachians · CC BY-SA 4.0
• [4]Geologic time scale · CC BY-SA 4.0
• [5]List of orogenies · CC BY-SA 4.0

Your path

1. What is the history and architecture of St. Peter's Basilica?
2. /What is moral anti-realism?
3. /Why do blue eyes happen because of the Tyndall effect?
4. /What is the ideal state in Plato's Republic?
5. /How does Amazon Prime Video handle movie releases?
6. /What was a photographic plate?
7. /What is the difference between earthenware and stoneware?
8. /What was the Alleghanian orogeny?