Field Trip #1
Igneous and Sedimentary Rocks
LOCATION: Mt. Woodson, Scripps Ranch Library
DATE: see syllabus
TIME: see website for time. Please be on time!
MEETING PLACE: Miramar College Room M105
BRING:
 Comfortable shoes
 Water to drink
 Sun hat/sun block (if its sunny)
 Sweatshirt (if its not)
 Notebook/pen
 Binoculars (optional)
 Camera (for photojournal)
Be green and carpool. The order of the following may be changed:
Stop #1: Scripps Ranch Public Library 10301 Scripps Lake Drive, San Diego, CA
92131.
Map
Stop #2 Miramar Lake (across the street from the library)
Stop #3: Mt. Woodson, Ramona/Poway: North side of Highway 67 just past mileage post
18.
Map
Study questions: (Hand in answers to these questions for credit on the
field trip. Answers must be legible!)
1. What is the name of the igneous rock formation exposed across from the
library and what type of igneous rock is it?
2. To what geologic period does this formation belong and what is the
approximate age?
3. What is the name of the sedimentary rock formation exposed at Miramar
Lake and what type of rock is it?
4. To what geologic period does this formation belong and what is the
approximate age?
5. What is the name of the igneous rock formation exposed at the Mt.
Woodson area and what type of rock is it?
6. To what geologic period does this formation belong and what is the
approximate age?
7. Compare the rock found at the library with that of Mt. Woodson. Are the
two more alike in texture, or mineral composition? Explain your choice:
8. What does the presence of Mt. Woodson (and the other granite peaks in the
county) tell us about the geologic history of the area?
9. What type of rock makes up the cobbles known as Poway Clasts, found at
Miramar Lake? From where did they originate?