An intrusive igneous rock that originally fills up a horizontal fracture between sedimentary layers; however, so much magma accumulates, that the laccolith pushes up the overlying sedimentary layers; thus a laccolith is a bubble of magma that separates sedimentary strata.

Laccolith

Explanation:

A laccolith is an intrusion with the shape of a mushroom that grows under the earth's surface. This happens when liquid magma exceeds its way between 2 layers of rock, causing the overlying sediments to puff out as the feature increases. Eventually, this causes the origin of small hills and mountains surrounding the top of the mountain.

моля да ми помогне с английски език аз не разбирам

molya da mi pomogne s angliĭski ezik az ne razbiram