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@ Chrome File Edit View History Bookmarks Profiles Tab Window Help © % [ RUEEGEEE Sedimentary Structures 131 Pamela Gore .. bedding plane il 1A i'/ i L Pamela Gore 4. Cross bedding 4k LAB EXERCISES Using the sedimentary structures provided in the lab, fill in the table below. For each sample, identify the sedimentary rock. Use the illustrations in this lab to identify the sedimentary structure. Note that some lab specimens may have more than one sedimentary structure, such as both laminations and burrows, or bur- rows and ripple marks. Use the Summary page to determine whether the sedimentary structure formed through inorganic processes or biogenic processes. If there is more than one sedimentary structure, there may be more than one answer. Finally, using what you learned in this lab, try to interpret the environment in which the sedimentary structure(s) formed. If the structure forms in moving wind or water, indicate that and interpret whether wave or current motion may have been involved. The environment of deposition may have been a river or beach. If the structure forms as mud dries, the environ- ment of deposition may have been a lake or tidal flat. ample | RockType Name of Sedimentary | Inorganicor | Interpret the environment of Structure Biogenic? deposition mudstone mudflat in formed during drying of lake 1 or water andstone | flaser bedding manly In e both fluvial and marine andstone graded bedding enviorments