ophitic texture

geology

Also known as: diabasic texture

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Last updated

July 1, 2026

Quick Summary

Ophitic texture refers to a specific fabric found in certain igneous rocks, particularly diabase. It is characterized by lath-shaped plagioclase crystals that are enclosed within larger, later-formed augite crystals. These plagioclase crystals may be arranged radially or in an irregular mesh. The term "ophitic" is derived from the Greek word for "snake-like," possibly alluding to the appearance of the rock fabric. This textural feature provides valuable insights into the conditions and sequence of mineral formation during the rock's cooling and crystallization process.12

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diabase
…the characteristic texture known as diabasic or ophitic. The larger pyroxene grains may completely enclose plagioclase; but as the quantity of the latter increases, pyroxene appears more interstitial.
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…the characteristic texture known as diabasic or ophitic. The larger pyroxene grains may completely enclose plagioclase; but as the quantity of the latter increases, pyroxene appears more interstitial.
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igneous rock
Important textural types
Ophitic texture is the association of lath-shaped euhedral crystals of plagioclase, grouped radially or in an irregular mesh, with surrounding or interstitial large anhedral crystals of pyroxene; it is characteristic of the common rock type known as diabase.
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Ophitic texture is the association of lath-shaped euhedral crystals of plagioclase, grouped radially or in an irregular mesh, with surrounding or interstitial large anhedral crystals of pyroxene; it is characteristic of the common rock type known as diabase.
Read More