Nipper's Harbour, Newfoundland. 8/4 Day 12
How
Did This Get Here? Quick facts: How a dike is formed: When a fracture occurs on the ocean floor, magma pushes through, rapidly cooling on all sides and forms a dike. How the ophiolite complex is formed: If dike formation happens repeatedly, a massive complex will form (up to 4 km). **link? to vocab page?** This is a sheeted dike; a part
of the tilted, broken and shifted ophiolite complex. We are in the Dunage
terrain; no longer the Grenville Basement material! There is a higher
degree of metamorphism. It is an ophiolite complex that differs chemically
from any other ocean-ridge basalts. This did not form at the spreading
divergent region of the ocean floor. |
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