Download part 1 - Research at UVU

Geologic Hazards (GEO 3200), Utah Valley University:
Lab 1A: Review of Landforms, Faults, and Plate Tectonics
Part A of this lab is designed to help review macro landforms and other features that are indicative of plate boundary
activity as well as major landforms that we will encounter in Utah.
Plate Boundary Landforms and Features.
Q1: Use the attached shaded relief map of North America and the eastern Pacific Ocean to map the location of plate
boundaries in this region of Earth (Aleutian Subduction Zone, Queen Charlotte-Fairweather Fault, Juan De Fuca Ridge,
Cascadia Subduction Zone, Mendicino Transform, San Andreas Fault, Baja California Spreading Center, East Pacific Rise,
and Central American Subduction Zone)
*Draw arrows indicating the relative motions across each of the plate boundaries you identify.
*Make sure to symbolize the three types of plate boundaries differently and be as precise with your line work. Describe
your symbols here:
Q2: On your maps indicate locations where you would expect (predict) that volcanic activity should be active. Use small
triangles to symbolize the volcanic activity.
Q3: On your map, please draw a profile line across either the Aleutian or Central American Subduction zone. Then use
this profile line to draw a cartoon cross section of the plate boundary from the surface into the asthenosphere. Including
at least the following features, but as many as you can comfortably address: crust/mantle boundary,
lithosphere/asthenosphere boundary, earthquake locations, volcanism, relative motions, and generalized surface
topography (but reasonable relative to the horizontal scale).
Mapping Utah Landforms
Q4: On the map of the piedmont just west of Mercur, UT please map the following features:
Major channel talweg networks
Alluvial Fans Surfaces and their relative age. Use color, shape, morphology and relative heights to differentiate their ages
(e.g., Pleistocene (dissected ballena), late Pleistocene, Holocene, and active). Consider also if they could be described as
entrenched, dissected, remnant, inset, etc.
Faults – if you see evidence for them in your fan mapping.
Describe your symbology here. You need to map contacts, because these are geomorphic surfaces you need to make
decisions about where the contact lies in the landscape’s slopes (at the top of a riser or bottom)… what is a riser?
0
625
1,250
2,500
3,750
5,000
Kilometers
North America Group
Explanation
Earthquake
depth
0 - 15
16 - 70
71 - 100
101 - 300
301 - 720
±