Name: __________________________________________ Date: _______________ Period: ________ Lab: Sedimentary Rocks All sedimentary rocks can be classified into one groups: clastic, chemical, or organic. Complete the following activity to learn about the classification of sedimentary rocks. Lab Preview: What will you be doing in this lab? ___________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ Purpose: To examine and identify different types of sedimentary rocks. Materials: sedimentary rock samples, hydrochloric acid, magnifying glass, textbook Procedure: 1. Use the chart on the next page to record your observations and data. 2. In the Observations column, record observations about each rock. 3. Determine the sediment size of each mineral sample using Table 2 on page ______. Record your answer (clay, silt, sand, or gravel) in the sediment size column. 4. Using your book and notes, hypothesize the types of minerals and/or fossils for each rock. You may also use a drop of HCl to check for the presence of Calcite. Record in the Minerals/Fossils Present column. 5. Based on your data in the other columns, decide whether each rock is clastic, chemical, or organic. Record your choice in the Type of Sedimentary Rock column. 6. When your data table is complete, answer all questions using complete sentences. Then clean up your lab area. Rock Name Observations Minerals or Fossils Present Sediment Size Clastic, Chemical, or Organic 1. Conglomerate 2. Sandstone 3. Shale 4. Limestone 5. Rock Salt Conclusions: 1. Why did you test the rocks with hydrochloric acid? Which mineral reacts with HCl? 2. What is needed in order for sedimentary rock fragments to form? 3. The mineral Halite forms by evaporation. Would you classify Halite at clastic, chemical, or organic? 4. How do you classify sedimentary rocks?