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Omineca belt
Term | Definition |
---|---|
What are the 4 main components of the Omineca belt | 1) Craton 2) Rocks deposited on craton margin 3) Pericratonic terranes(proximal and distal) 4)Accreted terranes |
How far west can the craton be traced by seismics and aero mag? | Rocky Mountain trench |
Craton: Main components | Monashee complex - paleoproterozoic orthogneiss overlain by metasediment |
Where does palinspastic reconstruction put the former craton argin boundary? | Near Revelstoke |
Craton: Major components in the Monashee complex | Paleoproterozoic orthogneiss (2Ga) Metasediment - Quartzite, marble |
Craton: Structural history of the Monashee complex | Oldest rocks exposed by early tertiary extension. |