Sedimentary rocks are made up of pieces of older rocks (igneous, metamorphic, and sedimentary) and organic remains (shells, bone, etc.). When rocks break apart from erosion they are transported by ...

Use one of the services below to sign in to PBS: You've just tried to add this video to My List ... rocks are that we can find on our planet as well as how you can make one of your very own ...

WHEN the first edition of this sound and very readable work appeared some eleven years ago, an appendix (76 pages, by Mr. T. Crook) dealing with the systematic examination of loose sediments was ...