Here's a piece of limestone.

After the limestone rocks, what?

And it's just limestone, nothing really special about it.

On the trail we took just before we reached the limestone rocks.

It's the same stuff as this and the same stuff as this.

And it's different than this limestone, you can see that.

I headed up hill just past the big limestone rocks we saw that Sunday.

This is the target site, the world's deepest hydrothermal spring at Cenote Zacaton in northern Mexico.

Rocks n Diamonds

Oh, he's the Rock the Rock of Gibraltar.

Like a rock.

Some rocks and some finches.

Decorative Rock

Ray It was Crease Limestone, and that was produced by sea creatures 350 million years ago in a nice, warm, sunny atmosphere.

an inlet among the rocks, many rocks that... she had never realized,

You wouldn't build a building out of this stuff, and you wouldn't try to give a lecture and write on the chalkboard with this.

They're clinging to a rock face and actually scraping bacteria off that rock face.

The waves crashed against the rocks.

I looked down from the top into the rocks.

You're climbing on little dimples and nubbins in the rock.

Not so fast. Wait a minute. Large rock...

We have to wait till the cast hardens.

You hit the solid rock.

A rock fell from above.

No water, rocky soil.

Didn't you see the rocks?

He hit his head against a rock.

He hit his head against a rock.

You fell off the rocks?

The very unusual Kaidun chondrite is a chondrite breccia consisting of a variety of highly oxidized and highly reduced lithologies.

There is a median point between tiny rock and gigantic rock, and in fact, if any of you have ever been to near Winslow, Arizona, there is a crater in the desert there that is so iconic that it is actually called Meteor Crater.

Under a high rock on a ledge near Penistone Crag.

No water, rocky soil.

And shale is not quite completely competent rock.

You bet what? I'll bet... he said he'd get off your rocks.

Get those wagons to the rocks.

Cement and lime

stucco, molded paneling, marble, black mirrors, darktoned portraits, columns,

So, that's just a rock in the hillside.

And as the sandstone weathers, new grains break free.

The Lord is my rock and my fortress.

The Lord is my rock!

He must have been smashed on the rocks.

And architect Christian Kerrigan has come up with a series of designs that show us how it may be possible to actually grow a limestone reef underneath the city.

The core comes up as these cylindrical tubes of limestone.