In situ

Webster's Dictionary of the English Language

·- In its natural position or place;

— said of a rock or fossil, when found in the situation in which it was originally formed or deposited.

II. In situ ·add. ·- In its natural or original position or place; in position;

— said specif., in geology, of a rock, soil, or fossil, when in the situation in which it was originally formed or deposited.

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