Lab6_Excavation Stage II

Dinosaur Excavation Stage II Part I: Excavation Stage II – Caudal Region Below is “site map” image of the excavation site(s). These images, and others you will need to complete this assignment, are available at: https://sites.google.com/tamu.edu/geol- 207-dinosaur-world-ex2/home . An arrow is labeled in the top right corner of your image indicating the direction of North. On your site map image, each bone has been numerically labeled. 1) Identify and Catalog the Bones: Use Table 2 below to catalog the bones recovered during the excavation. For each numbered bone, you should identify the type of bone and the region of the body the bone is from (in this lab, all bones are from the caudal region). Under notes, provide any features present that are important sharded derived characters that could help you in your identification. You should also provide an approximate measurement for each bone marked with a * using the scale bars on the zoom- in photos available at : https://sites.google.com/tamu.edu/geol-207-dinosaur-world-ex2/home Table 2. Bone catalog for Excavation Stage II. (10 pts) Bone Number Bone Identification Skeletal Region Measurements Other Notes Length (cm) Width (cm) 22* Caudal Vertebrae caudal 40 20 23 Caudal Vertebrae caudal 40 20 24 Caudal Vertebrae caudal 38 20 25 Caudal Vertebrae caudal 35 20 26 Caudal Vertebrae caudal 34 22 27 Caudal Vertebrae Caudal 33 23 28 Caudal Vertebrae Caudal 32 24 29 Caudal Vertebrae Caudal 30 20 30 Caudal Vertebrae Caudal 21 20 31 Caudal Vertebrae Caudal 22 22 32 Caudal Vertebrae Caudal 21 22 33 Caudal Vertebrae Caudal 21 21 34* Caudal Vertebrae Caudal 20 23 35 Caudal Vertebrae Caudal 18 21 36 Caudal Vertebrae Caudal 18 20 37 Caudal Vertebrae Caudal 18 19 38 Caudal Vertebrae Caudal 18 19 39 Caudal Vertebrae Caudal 17 21 40 Caudal Vertebrae Caudal 16 23

41* Caudal Vertebrae Caudal 15 22 42 Caudal Vertebrae Caudal 10 21 43 Caudal Vertebrae Caudal 10 22 44 Caudal Vertebrae Caudal 9 20 45 Caudal Vertebrae Caudal 8 20 46 Caudal Vertebrae Caudal 7 19 47* Caudal Vertebrae Caudal 7 19 48* Caudal Vertebrae Caudal 100 18 End of tail 49 Chevron Caudal 5 25 50* Chevron Caudal 4 30 51 Chevron Caudal 5 20 52 Chevron Caudal 5 20 53 Chevron Caudal 5 20 54 Chevron Caudal 5 20 55 Chevron Caudal 5 20 56 Chevron Caudal 5 20 57 Chevron Caudal 5 20 58 Chevron Caudal 5 20 59 Chevron Caudal 7 5 60* Chevron Caudal 7 5 61 Chevron Caudal 7 5 62 Chevron Caudal 7 7 63 Chevron Caudal 10 8 63 Chevron Caudal 10 8 65 Chevron Caudal 13 10 66 Chevron Caudal 13 10 67 Chevron Caudal 13 10 68 Chevron Caudal 13 7 69 Chevron Caudal 13 7 70 Chevron Caudal 11 7 71 Chevron Caudal 8 7 72 Chevron Caudal 8 5 73 Chevron Caudal 7 5 74 Chevron Caudal 5 5 75* Chevron Caudal 5 5 2) Interpret the Skeleton (5 pts) a) What is the approximate total length of the tail? Be sure to use the scale bars in the images determine the length. (1 pt) 3.5 meters b) Describe how the size of the caudal vertebrae changes from the proximal to the distal end of the skeletal remains? (1 pt) The caudal vertebrae start large from the proximal area and get smaller/shorter as you get closer to the distal end of the skeleton.