An exhumation event, defined as the vertical displacement of rocks with respect to the surface, may have started coevally with the emplacement of the pluton. |
The Boisvert tonalite pluton crosscuts these volcanic rocks in the project's south-eastern quarter. |
One of our huge shells fell midway of the pluton, which at once went down with an awful plunge. |
Water would naturally percolate through the rocks, and this would speed up the cooling of the pluton. |
The dip slopes are interpreted as separating individual sills near the base of the pluton. |
Some 600 m below this breccia the pluton is pervaded by a fine-grained granophyre, apparently the product of a sudden and final crystallization. |