The feature formed by cooling of molten magma across the bedding plane is

The feature formed by cooling of molten magma across the bedding plane is called a sill. A sill is a type of intrusive igneous rock that forms when magma is injected into a horizontal crack in the surrounding rock and then cools and solidifies. As the magma cools, it forms a flat sheet-like body that is parallel to the layering of the existing rock. Sills can be seen as flat, tabular bodies of rock that cut through existing rock layers. They can range in thickness from a few centimeters to several meters, and can cover large areas. Sills are typically composed of coarse-grained rocks, such as granite, gabbro or dolerite, and are often associated with other intrusive features like dykes, batholiths and laccoliths.