How are sills and laccoliths similar

-both form the cores of the mountains

-both form long, horizontal shafts.

-both form magma that flows horizontally.

-both solidify into a saucer shape.

Sill does not cut across preexisting rocks. Laccoliths can be contrasted with sills. It is any sort of igneous intrusion that has split apart two strata, giving rise to a domelike structure. Laccoliths tend to be smaller than a stock, and usually is less than 10 miles in diameter.