Answer: limestone

AnswerCrossword Clue
LIMESTONERock in Mammoth Cave.
limestonea sedimentary rock composed mostly of the mineral calcite
limestonerock consisting chiefly of powdered calcium
LIMESTONEMakeup of the Great Sphinx
LIMESTONE"Franklin ..." Charlie Daniels Band
LIMESTONELuray Caverns material
LIMESTONEStalactite base
LIMESTONESedimentary rock.
LIMESTONEDolomite.
LIMESTONEQuarry mineral
LIMESTONECalcium carbonate.
LIMESTONEEmpire State Building material
LIMESTONEGreat Pyramid material
LIMESTONEGreat Sphinx material
LIMESTONEQuarry rock
LIMESTONESedimentary rock
LIMESTONECalcium carbonate source