In general, perpendicularities are created by the presence of a Shard on the planet. The concentration of so much Investiture on the Cognitive and Physical Realms creates points of … friction, where a kind of tunneling exists. At these points, Physical matter, Cognitive thought, and Spiritual essence become one—and a being can slide between Realms. The existence of a perpendicularity (which often take the form of pools of concentrated power on the Physical Realm) on a planet is a hallmark of a Shard’s presence.
