Category: structure
Topics in Structural Geology | Types of Faults
Topics in Structural Geology | Folds & Folding
Topics in Structural Geology | Strain
Terms to Know!
Relevant for structure and mapping
Sudbury Impact – 1.85 Ga
Images by author
Banded Iron Formation, Soudan
Some absolutely gorgeous ~2.7 Ga Banded Iron Formation (BIF) from Soudan, Minnesota. The rotating silver and reddish layers are hematite and jasper respectively, and these BIFs differ from their Proterozoic counterparts in that they were chemically precipitated. The outcrop is intensely folded and shows numerous interference patterns, meaning that there are folds that have been… Continue reading Banded Iron Formation, Soudan