Answer the following questions:
1. Pinnacles National Monument and the Neenach Volcano. Open sanandreas.kmz. The Pinnacles and the Neenach volcano were formed 23 million years ago on the San Andreas Fault. Zoom into the Neenach outcrop placemark and take a look around. Click on the View southeast from Neenach outcrop placemark. Do you see evidence of the San Andreas Fault? There is no evidence of the San Andreas Fault at this point.
If you haven’t noticed evidence of the fault turn on the San Andreas Fault placemark. Using the measuring tool how far from the main fault line is the Neenach outcrop in kilometer?
Turn off the San Andreas Fault placemark and zoom into the Pinnacles National Monument placemark. Zoom out and take a look around. What evidence do you see of the San Andreas Fault?
Turn on the San Andreas Fault placemark and fly northeast toward the Pacific Ocean. Pay close attention to the path of the fault as you approach Point Reyes and Tomales Bay at the Pacific Ocean. Zoom back to Pinnacles National Monument. Using the measuring tool how far from the main fault line is the Pinnacles outcropping in kilometers?
Finally, zoom out so you can see both Pinnacles National Monument and Neenach volcano. Using the path measuring tool, measure the distance between them.
What has the rate of movement in centimeters/year been if they were in the same place 23 million years ago?
1.5 cm per year
2. Carrizo Plain stream offset. Zoom to the Carrizo Plain placemark. You are looking northeast across the Carrizo Plain. The side of the San Andreas Fault closest to you is on the Pacific Plate and the other side is on the North American Plate. Take a look around and look for evidence of the fault. Do you notice sag Adapted from Christopherson and Thomsen 2007, Applied Physical Geography 7th edition 2 ponds or linear features or offset streams? Exposed rocks
Zoom in closer to the points A and B. They are on two sections of an offset stream. The movement of the fault has shifted the path of the stream over time.Using the measuring tool how far apart are points A and B in meters?
Using the rate of movement for the San Andreas Fault that you calculated in Question 1 above, how long ago were the two points together?
23 million years ago
Open hawaii.kmz. Click on the Hawai‘i and the Emperor Seamounts placemark. The Hawai‘i–Emperor Seamounts have been formed by a plume of magma upwelling from the mantle and burning through the crust as the crust moves over this hot spot.
3. What is the path distance from the hot spot’s present location at the southeast end of the Hawaiian chain to the Meiji Seamount (use the measuring tool to determine the distance)?
4. The age of Midway Island is 27.2 million years
The distance from Midway to the active hot spot is 2430 km
Given these values, what is the average speed of the Pacific Plate movement per year (in centimeters and inches) over this time frame? 2cm (0.8 inches) per year.
5. How wide is the main crater from Byron Ledge to Uwekahuna Bluff?
5 meters wide
What is the relief (vertical distance from high to low point) from Uwekahuna Bluff to the floor of the crater?
6. How wide is the fire pit at Halemaumau?
½ mile wide (0.5 miles wide)
7. Turn off the topographic map overlay and fly around the crater for a while. What signs of volcanic activity do you see?
There is a leaky tumulus and a wide channel of lava flowing.
8. Click on the Current activity placemark. Since 1983 Pu`u `O`o has been active. Can you find the main vent for Pu`u `O`o? How far is lava travelling from Pu`u `O`o to the ocean where there are the plumes of steam?
They travel about 8 miles before reaching the sea.
9. Google Earth™ mapping service shows a road called Chain of Craters road that leads from Kilauea Do you think you could actually drive to the end of Chain of Craters road? Why or why not? To find the answer you might have to zoom in quite a bit.
Yeah it is possible to drive but you are likely to encounter streams of flowing lava according to the latest pictorial representation of the park.
10. What is the vertical relief from the top of Shiprock to the valley floor?
It is 7178 feet above the sea level.
11. How many radiating dikes (mounds of earth radiating from the center) do you see?
I can see six dikes radiating from the center.
12. How long is the dike running westward from Shiprock in miles?
30 miles or 48 km.
13. What is the relief from the top of the westward dike to the valley floor in feet using the elevation reported by Google Earth™ mapping service? 78 foot high