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Sabrina Imbler
Dyke (geology)
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Prologue
1.
2. A dyke, according to geology, is a sheet of magma born in a fracture. Dykes are best understood as the veins of a volcano, coursing hot and varicose toward the surface to erupt. Because of this, dykes are always younger than the body of rock in which they’ve made their home. Born differently than the mother rock, they make their presence known in rebel coloration: black against white, striped against mottled, crystal against sand. Geologists consider dykes intrusive formations, in part because they were formed underground until exposed.
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