1. Geology 1023
Geological maps

2. Geological maps Draw a map based on fragmentary data
Using samples and map descriptions interpret environments as they existed in the past
Make a list of the events that occurred

3. Map

4. If you extend all the boundaries…
You get contradictions/inconsistencies

5. Look for youngest contact(s)
Extending this doesn’t produce inconsistencies

6. Then add gradually older ones
Which stop at the younger contact

7. And the next…
Which again stops at the younger contact

8. Pattern or colour

9. Pattern or colour

10. Pattern or colour

11. Pattern or colour

12. Add structural or bedding info.

13. Add structural or bedding info.

14. Example given here much simpler then the example in the lab

15. Map interpretation Look at the geological map of the Wolfville Area
The rock descriptions for each unit are given (on the map)
There are examples given in the lab of each unit (samples are numbered according to the unit number on the map)

16. Map interpretation
Q2: Give the depositional environments (c.f. list in Lab. 3, e.g., beach, lagoon, etc.)
Q3: Insofar as possible, indicate the likely topography and climate that operated in the area over different times
Note: North Mountain Basalt, and Scots Bay Formation are Jurassic NOT Triassic
Q4: Indicate the evidence present for various geological features:
folding, faulting, intrusion, extrusion (mostly about the nature of the contacts)

17. Map interpretation Deduce a geological history.
Put in numerical order starting at # 1 for the oldest

18. The most basic geological sequence of events must have:
Deposition
(put the rocks there in the first place)
Uplift and erosion
(so we can see them)
Repeat

19. Adding a few wrinkles Deposition (must have) Folding/faulting
Metamorphism
Intrusion
Uplift and erosion (must have)
Repeat
These can be in any order (or may be missing altogether)

20. The Wolfville sheet has 3 of these cycles.

21. Questions?