Lightning in the Peaks: How Tall Were the Peaks? : GPH 112: Intro to Phys Geography Lab (2024 Spring

.pdf

School

Arizona State University *

*We aren’t endorsed by this school

Course

112

Subject

Geography

Date

Apr 3, 2024

Type

pdf

Pages

5

Uploaded by DoctorProtonQuetzal26

Report
Lightning in the Peaks: How Tall Were the Peaks? Due Feb 14 at 11:59pm Points 3 Questions 1 Available after Jan 15 at 12am Time Limit None Instructions Roughly 200,000 years ago, the San Francisco Peaks underwent a massive lateral eruption to the northeast, similar to the lateral eruption seen in the 1980 Mount St. Helens. Today, the tallest point of the remaining peaks stands thousands of feet shorter than the original cone. In this lab, we'll look at estimating the height of the former San Francisco Peak before its dramatic and destructive eruption.
EXAMPLE QUESTION : How tall was the historic San Francisco Mountain using the current mountain slope to Agassiz Peak? First then, let's estimate the slope of this historic volcano. Go to 35.3077, -111.6898 and mark down the elevation. Then, travel to Agassiz Peak and mark down the elevation at the top. Find the difference.
Attempt History Attempt Time Score LATEST Attempt 1 6 minutes 3 out of 3 Score for this quiz: 3 out of 3 Submitted Feb 14 at 12:43pm This attempt took 6 minutes. Question 1 3 / 3 pts Mountain side elevation: 2724 meters Agassiz Peak elevation: 3746 meters Difference: 1022 meters Now find the slope (rise over run). If the distance between the two points is 2 kilometers, take the difference in elevation you found and divide that by the distance to determine the slope per kilometer. Current slope from the mountain side to Agassiz Peak = 1022 meters / 2,000 meters (2 km) = .511 Then, if the distance from Agassiz Peak to the historic peak is 1.9 kilometers, determine how many more feet the volcano would have been if the slope was kept consistent (add the current height of Agassiz Peak to the multiplied slope and distance to the original peak). Ancient volcano height = current Agassiz Peak height + (slope x distance to historic peak) Ancient volcano height = 3746 meters + (.511 x 1,900 meters) Ancient volcano height = 3746 + 971 meters = 4717 meters or roughly 15,500 feet! To estimate the historic height of the San Francisco Mountain before its destructive eruption, we will take the slope of the current volcano and extend that to the previous center point of the volcano. The slope can be estimated by determining the change in height between a location along the base of the peak, and a current high point (like Humphrey's or Agassiz Peak). Then, that slope can be applied to the remaining distance towards the historic center of the peak. You can see an overhead view of this idea in the image below.
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
  • Access to all documents
  • Unlimited textbook solutions
  • 24/7 expert homework help