Where these walls of igneous rock cut across rock layers, they are called “dikes.” Every now and then, when conditions are just right, sediments get to play this game, too. When they’re over ...

The most common intrusive igneous rock in the area is known as diabase ... York County in the form of what geologists called dikes. These fractures in the earth’s crust were caused by ...

This smooth granite rock in Joshua Tree National Park contains a near-vertical dike. Sometimes called “broken terrace walls,” a dike, Dee explains, is a “sheetlike igneous intrusion that ...

This helps explain a number of observations, including the sheets of igneous rock (formed in those fractures) called “dikes” that are so common in and around these features. The other ...

igneous, mafic dike swarms as piercing points to determine nearest-neighbor continents in the past." Mafic dikes are dark-colored rocks or minerals that are in a dike formation, which is a sheet ...

“Igneous petrology doesn’t pay well ... to show the ripples and color distinctions between the “country rock” and the dike that intruded through it. The blending phenomenon resulted ...

igneous, mafic dike swarms as piercing points to determine nearest-neighbor continents in the past." Mafic dikes are dark-colored rocks or minerals that are in a dike formation, which is a sheet ...

igneous, mafic dike swarms as piercing points to determine nearest-neighbor continents in the past.” Mafic dikes are dark-colored rocks or minerals that are in a dike formation, which is a sheet of ...

"Igneous petrology doesn't pay well," Penn ... to show the ripples and color distinctions between the "country rock" and the dike that intruded through it. The blending phenomenon resulted in ...