Other limestones are also known which contain an admixture of clay.
They occur in limestones and shales and are not associated with igneous rocks.
And what's all this I hear about limestones and butter-scotch and wisdom?
The Cretaceous limestones of Mexico were folded into lofty mountains.
Geologically, it has a basis of limestones, resting on sandstones.
Soft stones, limestones, slate or soapstones are not good for this purpose.
To this head belong all limestones which contain from 20 to 30 per cent.
Occurs also as crystals in some limestones and igneous rocks.
Like limestones, they are very widespread in formations of all ages except the very old.
These limestones were subsequently raised out of the sea to be eroded.