Lava cores

As a result, the individual prisms differ in both sides of the center and are arranged obliquely in the form of barbs pen. Investigating of volcanic rocks, bare action of the destructive processes, it is often difficult to decide whether we are dealing with the remnants of veins or thread. Location columnar separately allows us to understand sometimes in this difficult question, so, for example., Vertical pillars on the banks of the Colorado River have the location, which is characteristic of individual lava flow on the contrary, cirrus formation Gumboldtovoy rocks on the shore of Elbe Aussiga (mouth) in the Czech Republic are excellent example of the structure, which have cores.