Dykes and Sills

Dykes and Sills

Dykes (vertical sheets) and sills (horizontal sheets of crystallized magma):

Felsic dyke: 14 cm wide pink, sugary (aplite) dyke cutting granodiorite.

Mafic dyke: two segments of 40 cm wide brown gabbro dyke (Kaminak?) cutting cobble conglomerate.

>

Mafic sill: irregular sill cutting layered (bedded) sandstone, with set of white quartz veins transecting the sill.