Original sediments classified by clastic chemical organic and evaporties and the corresponding lithified sedimentary rock is displayed in this chart This newly revised chart explains how sedimentary rocks are formed and give clues for students to identify sedimentary rocks, This 4-color 18"" X 24"" chart incorporates National Science Standards, Unknown samples and 8 1/2"" X 11"" replica cardstock charts are provided for a classroom of 30 in the classroom project, American Educational Products have a lead ship time of 21 days, SKU: AMED539