dyke phase

plural dyke phases · alternative dyke-phase

1. geographyThe period or event during which a dyke (a body of rock originally filling a fissure but now often rising above the older stratum that has eroded away) is formed.

   The rocks of dyke phase include viz. microgranite, rhyolite, trachyandesite, trachydacite in Siwana

   2011, Rajesh Srivastava, Dyke Swarms: Keys for Geodynamic Interpretation, page 277

   2 more examples

   and I have failed to detect those similarities between the sill and dyke phase of the same magma, which may reasonably be expected on such a view.

   1916, Geological Society of South Africa, Transactions - Volumes 18-24, page 46

   One of the most striking features of this igneous cycle is the remarkably well-developed dyke-phase, which in general followed, though to some extent it overlapped, the plutonic phase.

   1926, Frederick Henry Hatch, Alfred Kingsley Wells, The Petrology of the Igneous Rocks, page 490