80 answer the questions below. when you are finished, submit this assignment to your teacher by the due date for full credit. in this laboratory experiment, you will write a narrative history of a rock section found in the grand canyon. you will describe and explain the events starting with the vishnu schist forming and ending with the unconformity above the redwall limestone in the mississippian. your description should include environmental changes. example: • sea level lowered, and the esplanade sandstone was deposited in a beach environment. • erosion, and the sea level rose. • hermit shale deposited in a deeper sea. • sea level drops, returning the area to a beach environment where the coconino sandstone was deposited. 1. interpret the bottom half of the cross section below. start with the vishnu schist and end with the redwall limestone. scoring: (8 points) score correct order: (8 points) score proper environmental changes: (4 points) score attention to detail and completeness:(5 points) score 2. there is one of each type of unconformity in this diagram. name at least one of each of them by indicating the layers that they are between. nonconformity:angular unconformity:disconformity:your score of 25

events in order:

1.       vishnu schist

2. zoroaster granite

3. bass limestone

4. hakatar   shale

5. igneous intrusion

6. shinumo quartzite

7. dox sandstone

8. tapeats limestone

9. bright angel shale

10. muav limestone

11. temple butte limestone

12. redwall limestone  

nonconformity

answer: the unkar group shows angular unconformity because the layers are turned at angle.

unconformity

answer: specifically the angular unconformity occurs between the cambrian and precambrian rocks. the dox sandstone, shinumo quartzite, hakatar shale, and bass limestone have been filled. an angular unconformity occurs between the cambrian and precambrian rocks. the dox sandstone, shinumo quartzite, hakatar shale, and bass limestone have been filled.

disconformity

answer: the disconformities aremarked irregular lines between the sedimentaryrocks layers.

most community's take hundreds of years to become stable

answer: national resource conservation services

national resource conservation services is the us. based approach that provides technical and financial assistance for natural resource management. nrcs society in conservation of resources by involving in activities like farmland protection, flood prevention, watershed protection, urban conservation, conserves economic and environmental conditions. it conducts soil surveys and implements the policy of natural resources management on the society.