Chalky Rock Often Containing Skeletal Fragments
This page is the CodyCross answer for the clue below from Cruise Ship, Group 657, Puzzle 5 (Nightclubs).
Question is: Chalky Rock Often Containing Skeletal Fragments
and the answer is: LIMESTONE
Word Meaning:
LIMESTONE — An abundant rock of marine and freshwater sediments; primarily composed of calcite (CaCO₃); and occurring in a variety of forms, both crystalline and amorphous.
Definitions from Wiktionary.