This activity is designed for students to learn about sedimentary environments. Students will learn about grain size, shape, and arrangement and how it relates to deciphering sedimentary environments. Students are given a sediment sample to analyze. They first examine the sample under the microscope and then will use sieves to separate the sediments into size classes. They will also take time to compare their sample versus another group's sample in the classroom. They will also have an opportunity to look at rock specimens representing sedimentary structures including mud cracks, cross bedding, and ripple marks. In the end, students should gain some skills at using basic observations and data collection to interpret the original depositional environment.