In this case, researchers studied an area in the Yilgarn Craton; more specifically, at a dyke within the craton ... in place — encased in an igneous intrusion that cut through older rock ...

And the evidence of volcanoes, dyke swarms and lava fields are evident ... through the repeated intrusion of igneous dykes, all aligned NNW, as the opening was in the direction WSW-ENE.

Think lava lamp. In recent years, evidence of dike-fed igneous intrusions has been mounting, but clear evidence of diapirs has been elusive. However, researchers at the University of California ...