Hornfels is the group name for a set of contact metamorphic rocks that have been baked and hardened by the heat of intrusive igneous masses and have been rendered massive, hard, splintery, and in some cases exceedingly tough and durable. [1] .

Hornfels is a fine-grained metamorphic rock that was subjected to the heat of contact metamorphism at a shallow depth. It was "baked" by heat conducted from a nearby magma chamber, sill, dike, or lava flow. Common temperatures for the formation of hornfels range from about 1300 to 1450 degrees Fahrenheit (700 to 800 degrees Celsius).

Apr 23, 2023 · Hornfels can be almost any color, but black, gray, brown, reddish and greenish rocks are common. It is a type of metamorphic rock that gets its name from its resemblance to animal horn. It forms when magma heats other rock, …

May 30, 2018 · Hornfels is a type of metamorphic rock that gets its name from its resemblance to animal horn. Hornfels forms when magma heats other rock, which may be igneous, metamorphic, or sedimentary. The most common colors of hornfels are black and dark brown.

Hornfels Today this name is widely used for a group of compact, highly metamorphosed contact rocks, typically found in inner aureoles. It derives from an ancient term used by miners in Saxony (Germany) for hard compact rocks of various origins, characterised by their horny appearance and conchoidal to subconchoidal fracture, and commonly ...

All of the rocks called hornfels—a hard, fine-grained, flinty rock—are created when heat and fluids from the igneous intrusion alter the surrounding rock, changing its original mineralogy to one that is stable under high temperatures.

Hornfels are a classified group of contact metamorphic rocks that have been baked under high temperatures by the heat of igneous intrusions and as a result, have become massive, splintery, extremely hard, and in some cases exceedingly tough and durable.

Hornfels is a metamorphic rock formed by the contact between mudstone / shale, or other clay-rich rock, and a hot igneous body, and represents a heat-altered equivalent of the original rock. This process is termed contact metamorphism.

Hornfels is an important rock in the geological world, as it provides a clear indication of the type of metamorphic activity that has occurred in an area. In this article, we will explore the formation, texture, and structure of hornfels in detail.

Hornfels are a type of metamorphic rocks having a dense, compact and fine grained structure. The formation of these rocks is the result of contact metamorphism of shales and basalts.