* Northern Hemisphere:
* North America: The northern United States (especially New England and the Great Lakes region), Canada, and Alaska.
* Europe: Scandinavia, the British Isles, the Alps, and other mountainous regions.
* Asia: Siberia, the Himalayas, and other mountainous regions.
* Southern Hemisphere:
* South America: Patagonia
* Antarctica: (Though less commonly seen due to the vast ice sheets.)
Key factors:
* Presence of past glaciation: Areas that have experienced glacial activity in the past are more likely to have erratics.
* Type of glacial activity: Erratics are more common in areas that experienced continental glaciation (large ice sheets) rather than alpine glaciation (smaller glaciers in mountains).
* Erosion and transportation: Glaciers erode and transport rocks, so areas with significant glacial erosion and deposition are more likely to have erratics.
Note: While erratics are often found in mountainous areas, they can also be found in lower-lying areas that were once covered by glaciers.
