He spent another day and night on the rock with no food or water.

She sat down next to him on the rock, a little too close.

I'll have enough left over to get me started on the next rock.

So I sat down on the rock and took time to study the country.

He came back with both hands full and once more took up his position on the rock.

She has been making her mark on natural rock as well.

He'd spent most of the night sitting by himself on a rock.

I sat on a rock and took a long look around.

She sat down on a rock and looked at the child in her arms.

She sat down on a big rock and looked around her.