Feb 24, 2024 · Learn about metamorphic rocks in geology. Discover how they form, the types, examples, and how to identify them.

A picture gallery of metamorphic rocks including amphibolite, gneiss, hornfels, marble, novaculite, phyllite, quartzite, schist, skarn, slate and soapstone.

Metamorphic rocks arise from the transformation of existing rock to new types of rock in a process called metamorphism. The original rock (protolith) is subjected to temperatures greater than 150 to 200 °C …

May 5, 2025 · The major types of metamorphic rocks are detailed here, which include regional, contact and mechanical metamorphism.

Dec 27, 2025 · Metamorphism can occur either when a rock moves from one position to another along a single geotherm or when the geotherm itself changes form. The former can take place when a rock is …

Oct 27, 2021 · In metamorphic rocks some or all of the minerals in the original rock are replaced, atom by atom, to form new minerals. Types of metamorphic rocks include gneiss, quartzite, marble, schist, …

From the shimmering layers of schist, to the tightly folded structures of gneiss, to the pressure-sealed compaction of slate, metamorphic rocks help us reconstruct ancient geological events that shaped …

In some cases, rocks from the upper mantle can be brought up to the surface through tectonic processes and exposed as metamorphic rocks. These rocks are often ultramafic in composition and …

Feb 2, 2023 · Metamorphic rocks are classified into two different types based on their texture, how minerals align in the newly formed rock. 1. Foliated Sedimentary Rocks. Foliated rocks are rocks that …

This page discusses the formation and characteristics of metamorphic rocks created through metamorphism, influenced by heat and pressure. It distinguishes between foliated and non-foliated …