Limestone Rock With Egg-Like Particles

This page is the CodyCross answer for the clue below from Mesopotamia, Group 972, Puzzle 5 (Astronomical Diaries).

Question is: Limestone Rock With Egg-Like Particles

and the answer is: OOLITE

Word Meaning:

OOLITE — (geology) A rock consisting of spherical grains within a mineral cortex accreted around a nucleus, often of quartz grains.

Definitions from Wiktionary.