What is the name for a large igneous intrusion that has withstood the force of weathering?

A large igneous intrusion that has withstood the force of weathering is called a batholith. Batholiths are vast bodies of igneous rock that form from magma that cools and solidifies beneath the Earth's surface over a long period. The size of a batholith can be immense, often covering hundreds of square kilometers.

The process of weathering, which includes physical, chemical, and biological breakdown of rocks, can take millions of years, during which time the overlying materials are eroded away, exposing the batholith at the surface. This immense scale and depth of formation are what differentiate batholiths from other igneous features such as dykes and sills, which are typically smaller and intrude into existing rock layers rather than forming large, massive bodies.

Dykes and sills are also igneous intrusions but differ in their orientation and context within the surrounding rocks. A dyke is a vertical or steeply inclined sheet of igneous rock that cuts across pre-existing strata, while a sill is a horizontal layer that intrudes parallel to the existing layers. Volcanic rock refers to lava that has erupted at the surface or its products, not necessarily indicative of large underground formations that have resisted weathering