primary rocks


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primary rocks

[′prī‚mer·ē ′räks]
(petrology)
Rocks whose constituents are newly formed particles that have never been constituents of previously formed rocks and that are not the products of alteration or replacement, such as limestones formed by precipitation from solution.
References in periodicals archive ?
It is assumed that initially, braided paleo-Indus river eroded the uraniferrous material from primary rocks in the north and west and deposited the material in foredeep basin and developed conventional paleo-channel type uranium ore bodies.
It's one of the primary rocks of the highlands of the moon.
For example, it has been found that failures in the primary rocks are generally perpendicular to the principal forces often resulting in shear failures.

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