Petrology

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Petrology is the branch of geology that dives into how rocks originate, what they’re made of, how their textures and structures reflect the forces that formed them — from molten magma solidifying to deep-burial metamorphism and surface sedimentary layering. In this category, you’ll explore the chemical and physical story behind every rock type, understand how they transform through geological time, and see why engineers, geologists and field-practitioners care deeply about their composition and behaviour.

Thrust faulting of Jurassic sedimentary rock at Ketobe knob along the San Rafael swell in central Utah (Shortening occures; Davis & Reynolds 1996).

Sedimentary Petrology

Sedimentary petrology is the study of sedimentary rocks, which are rocks that form from the accumulation and solidification of sediment. This field of geology...

Petrology Petrology Overview: Igneous, Sedimentary & Metamorphic Rocks Explained

The word petrology comes from the Greek petra (rock) and logos (study or knowledge).In geology, petrology focuses specifically on rocks as aggregates of minerals,...

Basalt vs Granite – Key Differences

Basalt and granite are among the most common and important igneous rocks on Earth. Both form from molten magma, but under very different conditions.Basalt...
Microfolds in a metamorphic rock; phyllite from the eastern Alps of Italy

Metamorphic Petrology

Metamorphic petrology is the study of metamorphic rocks, which are rocks that have been transformed from one rock type into another through the action...

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Tufa

Tufa is a type of porous limestone formed by the precipitation of calcium carbonate from water, often in environments where freshwater meets carbon-dioxide-rich waters,...

Marston Marble

Marston Marble is a unique and highly ornamental type of fossiliferous limestone, valued for its artistic and aesthetic qualities. It is characterized by very...

Lava Stone

Lava stone is a type of igneous rock formed from the rapid cooling of lava that is rich in magnesium and iron. This cooling...

Tiger Iron

Tiger Iron is a metamorphic rock composed mainly of tiger's eye, red jasper, and black hematite. It's admired for its remarkable bands of color...

Boji Stones (Shaman Stones)

Boji Stones, also known as Moqui Marbles or Shaman Stones, are small, round, naturally occurring stones found in the Navajo Sandstone formation of Utah...

Tinguaite

Tinguaite is a type of volcanic rock, primarily composed of nepheline and alkali feldspar, with lesser amounts of other minerals such as amphibole, biotite,...

Calligraphy Stone or Arabic Stone

Calligraphy Stone, also known as Mariam Stone or Arabic Stone, is a unique type of fossiliferous limestone that features intricate patterns resembling Arabic calligraphy...

Menalite

Menalite is a type of sedimentary rock characterized by its distinctive nodular or concretionary structure, often found in association with clay deposits. These nodules...