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Igneous Rock Textures

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The texture of a rock refers to the details of its visible character—the size and quality and interrelations of its grains and the fabric they form. Larger-scale features, such as fractures and layering, are considered rock structures.

Igneous Rocks in a Nutshell

More About Igneous Rocks

Images 1-9 of 9
Invisible grainsAphanitic TextureSame-sized grainsEquigranular TextureNo visible grainsGlassy TextureVisible grainsPhaneritic Texture
Crystals with foreign grains insidePoikilitic TextureBig grains in a fine matrixPorphyritic TextureVolcanic bits and piecesPyroclastic TextureCrisscross crystalsSpinifex Texture
Rocks full of bubblesVesicular Texture

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