High levels of certain plant nutrients in runoff can lead to rapid growth of algae (an algal bloom) in aquatic ecosystems. These algal blooms are generally followed by algal death and decomposition, which consumes large
amounts of dissolved oxygen in the water and results in oxygen levels insufficient to support aerobic respiration.
This process is known as eutrophication. The amount of algae present in a body of water can be estimated from the
amount of chlorophyll a in a sample of the water. A researcher studying eutrophication collected samples at
different times of the year in a freshwater ecosystem. The samples were analyzed for total nitrogen and chlorophyll
a concentration (Figure 1) as well as total phosphorus and chlorophyll a concentration (Figure 2).

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.

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