Outline for class: Tuesday, 23 February
Topic: Let's go to the Beach!
In Class Activities:
- Some major objectives of the past unit: (1) to get a sense
of what the seafloor looks like and how we can figure out what's
there; (2) to gain practice with some methods: calculating rates
and depths, map and profile reading; (3) to learn how seafloor
is created and destroyed-how oceans form; (4) to gain practical
information such as preditions for earthquake intensities at
different locations; (5) to enrich travel experiences both locally
and globally (e.g., Hawaii, the "ring of fire"); (6)
to provide ideas for field projects.
- The rocks that make up San Francisco formed in the ocean
and have since been plastered onto the continental margin. The
rocks include parts of the ocean crust that were formed at a
mid-ocean ridge (basalt and serpentine) and marine sediments
that collected on top of the volcanic basalt (chert and sandstone).
A new book called "Geologic Trips: San Francisco and the
Bay Areas" by Ted Konigsmark, contains information about
the local geology and descriptions of field trips you could take
to various locations in the Bay Area.
- Review of Pacific "Ring of Fire", Hawaii, and direction
of Pacific plate motion
- Questions for 3x5 card: look at the sand sample you received
in class; describe your sand sample and also your neighbor's
sample.
- Video: The Beach: A River of Sand (can be viewed at the Media
Access Center, 3rd floor, Library); see questions in course reader.