This slide deck has four photographs of igneous intrusions. Figure out what kind of intrusion (sill, dike, laccolith, etc.) is present, and type the correct term in the box. If the intrusion is hiding too well in its natural habitat, click the blue button in the lower left of each slide for help spotting it.

Use left and right arrow to change slide in that direction whenever canvas is selected.
Slide 1
Sandy coloured horizontal layers of rock are visible in a cliff face. In the middle a single vertical layer cuts through them.

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Name this intrusion.

Grey rocks with a marbled appearance from being deformed. Two narrow intrusions cut through them.

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Here are two examples of the same type of intrusion. Name the type.

Slide 1 of 4